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  • C# Select clause returns system exception instead of relevant object

    - by Kashif
    I am trying to use the select clause to pick out an object which matches a specified name field from a database query as follows: objectQuery = from obj in objectList where obj.Equals(objectName) select obj; In the results view of my query, I get: base {System.SystemException} = {"Boolean Equals(System.Object)"} Where I should be expecting something like a Car, Make, or Model Would someone please explain what I am doing wrong here? The method in question can be seen here: // this function searches the database's table for a single object that matches the 'Name' property with 'objectName' public static T Read<T>(string objectName) where T : IEquatable<T> { using (ISession session = NHibernateHelper.OpenSession()) { IQueryable<T> objectList = session.Query<T>(); // pull (query) all the objects from the table in the database int count = objectList.Count(); // return the number of objects in the table // alternative: int count = makeList.Count<T>(); IQueryable<T> objectQuery = null; // create a reference for our queryable list of objects T foundObject = default(T); // create an object reference for our found object if (count > 0) { // give me all objects that have a name that matches 'objectName' and store them in 'objectQuery' objectQuery = from obj in objectList where obj.Equals(objectName) select obj; // make sure that 'objectQuery' has only one object in it try { foundObject = (T)objectQuery.Single(); } catch { return default(T); } // output some information to the console (output screen) Console.WriteLine("Read Make: " + foundObject.ToString()); } // pass the reference of the found object on to whoever asked for it return foundObject; } } Note that I am using the interface "IQuatable<T>" in my method descriptor. An example of the classes I am trying to pull from the database is: public class Make: IEquatable<Make> { public virtual int Id { get; set; } public virtual string Name { get; set; } public virtual IList<Model> Models { get; set; } public Make() { // this public no-argument constructor is required for NHibernate } public Make(string makeName) { this.Name = makeName; } public override string ToString() { return Name; } // Implementation of IEquatable<T> interface public virtual bool Equals(Make make) { if (this.Id == make.Id) { return true; } else { return false; } } // Implementation of IEquatable<T> interface public virtual bool Equals(String name) { if (this.Name.Equals(name)) { return true; } else { return false; } } } And the interface is described simply as: public interface IEquatable<T> { bool Equals(T obj); }

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  • Android: Programatically Add UI Elements to a View

    - by Shivan Raptor
    My view is written as follow: package com.mycompany; import android.view.View; import java.util.concurrent.TimeUnit; import java.util.ArrayList; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.util.AttributeSet; import android.graphics.Paint; import android.graphics.Point; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; import android.widget.*; public class GameEngineView extends View implements SensorEventListener { GameLoop gameloop; String txt_acc; float accY; ArrayList<Point> bugPath; private SensorManager sensorManager; private class GameLoop extends Thread { private volatile boolean running = true; public void run() { while (running) { try { TimeUnit.MILLISECONDS.sleep(1); postInvalidate(); pause(); } catch (InterruptedException ex) { running = false; } } } public void pause() { running = false; } public void start() { running = true; run(); } public void safeStop() { running = false; interrupt(); } } public void unload() { gameloop.safeStop(); } public GameEngineView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); // TODO Auto-generated constructor stub init(context); } public GameEngineView(Context context, AttributeSet attrs) { super(context, attrs); // TODO Auto-generated constructor stub init(context); } public GameEngineView(Context context) { super(context); // TODO Auto-generated constructor stub init(context); } private void init(Context context) { txt_acc = ""; // Adding SENSOR sensorManager=(SensorManager)context.getSystemService(Context.SENSOR_SERVICE); // add listener. The listener will be HelloAndroid (this) class sensorManager.registerListener(this, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL); // Adding UI Elements : How ? Button btn_camera = new Button(context); btn_camera.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT)); btn_camera.setClickable(true); btn_camera.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { System.out.println("clicked the camera."); } }); gameloop = new GameLoop(); gameloop.run(); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { // TODO Auto-generated method stub //super.onMeasure(widthMeasureSpec, heightMeasureSpec); System.out.println("Width " + widthMeasureSpec); setMeasuredDimension(widthMeasureSpec, heightMeasureSpec); } @Override protected void onDraw(Canvas canvas) { // TODO Auto-generated method stub // super.onDraw(canvas); Paint p = new Paint(); p.setColor(Color.WHITE); p.setStyle(Paint.Style.FILL); p.setAntiAlias(true); p.setTextSize(30); canvas.drawText("|[ " + txt_acc + " ]|", 50, 500, p); gameloop.start(); } public void onAccuracyChanged(Sensor sensor,int accuracy){ } public void onSensorChanged(SensorEvent event){ if(event.sensor.getType()==Sensor.TYPE_ACCELEROMETER){ //float x=event.values[0]; accY =event.values[1]; //float z=event.values[2]; txt_acc = "" + accY; } } } I would like to add a Button to the scene, but I don't know how to. Can anybody give me some lights? UPDATE: Here is my Activity : public class MyActivity extends Activity { private GameEngineView gameEngine; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // add Game Engine gameEngine = new GameEngineView(this); setContentView(gameEngine); gameEngine.requestFocus(); } }

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  • How do I implement a listener pattern over RMI using Spring?

    - by predhme
    So here is a generalized version of our application desgin: @Controller public class MyController { @Autowired private MyServiceInterface myServiceInterface; @RequestMapping("/myURL") public @ResponseBody String doSomething() { MyListenerInterface listener = new MyListenerInterfaceImpl(); myServiceInterface.doThenCallListener(listener); // do post stuff } } public interface MyListenerInterface { public void callA(); public void callB(); } public class MyListenerInterfaceImpl implements MyListenerInterface { // ... omitted for clarity } public interface MyServiceInterface { public void doThenCallListener(MyListenerInterface listener); } public class MyServiceImpl { public void doThenCallListener(MyListenerInterface listener) { // do stuff listener.callA(); } } Basically I have a controller that is being called via AJAX in which I am looking to return a response as a string. However, I need to make a call to the backend (MyServiceInterface). That guy is exposed through RMI by using Spring (man that was easy). But the service method as described requires a listener to be registered for invokation completion purposes. So what I assume I need to achieve is transparently to the backend make it so that when the listener methods are called, really the call is going over RMI. I would have thought Spring would have a simple way to wrap a POJO (not a service singleton) with RMI calls. I looked through their documentation but they had nothing besides exposing services via RMI. Could someone point me in the right direction?

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  • Autofac wiring question - beginner

    - by user645788
    Beginners question: Given two classes: Myclass5 and Myclass6 how can one wire up following factory method (returned as Func) such that myclass5 and myclass6 instances and IMyClass that they depend on are all retrieved via autofac (assuming that these three instances are registered). public static MyClass4 FactoryMethod(int nu) { if (nu == 1) return new MyClass5(....); if (nu == 4) return new MyClass6(....); throw new NotImplementedException(); } public abstract class MyClass4 { } public class MyClass5 : MyClass4 { public MyClass5(int nu, IMyClass a) { } } public class MyClass6 : MyClass4 { public MyClass6(int nu, IMyClass a) { } }

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  • How do I change the base class at runtime in C#?

    - by MatthewMartin
    I may be working on mission impossible here, but I seem to be getting close. I want to extend a ASP.NET control, and I want my code to be unit testable. Also, I'd like to be able to fake behaviors of a real Label (namely things like ID generation, etc), which a real Label can't do in an nUnit host. Here a working example that makes assertions on something that depends on a real base class and something that doesn't-- in a more realistic unit test, the test would depend on both --i.e. an ID existing and some custom behavior. Anyhow the code says it better than I can: public class LabelWrapper : Label //Runtime //public class LabelWrapper : FakeLabel //Unit Test time { private readonly LabelLogic logic= new LabelLogic(); public override string Text { get { return logic.ProcessGetText(base.Text); } set { base.Text=logic.ProcessSetText(value); } } } //Ugh, now I have to test FakeLabelWrapper public class FakeLabelWrapper : FakeLabel //Unit Test time { private readonly LabelLogic logic= new LabelLogic(); public override string Text { get { return logic.ProcessGetText(base.Text); } set { base.Text=logic.ProcessSetText(value); } } } [TestFixture] public class UnitTest { [Test] public void Test() { //Wish this was LabelWrapper label = new LabelWrapper(new FakeBase()) LabelWrapper label = new LabelWrapper(); //FakeLabelWrapper label = new FakeLabelWrapper(); label.Text = "ToUpper"; Assert.AreEqual("TOUPPER",label.Text); StringWriter stringWriter = new StringWriter(); HtmlTextWriter writer = new HtmlTextWriter(stringWriter); label.RenderControl(writer); Assert.AreEqual(1,label.ID); Assert.AreEqual("<span>TOUPPER</span>", stringWriter.ToString()); } } public class FakeLabel { virtual public string Text { get; set; } public void RenderControl(TextWriter writer) { writer.Write("<span>" + Text + "</span>"); } } //System Under Test internal class LabelLogic { internal string ProcessGetText(string value) { return value.ToUpper(); } internal string ProcessSetText(string value) { return value.ToUpper(); } }

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  • java - powermock whenNew doesnt seem to work, calls the actual constructor

    - by user1331243
    I have two final classes that are used in my unit test. I am trying to use whenNew on the constructor of a final class, but I see that it calls the actual constructor. The code is @PrepareForTest({A.class, B.class, Provider.class}) @Test public void testGetStatus() throws Exception { B b = mock(B.class); when(b.getStatus()).thenReturn(1); whenNew(B.class).withArguments(anyString()).thenReturn(b); Provider p = new Provider(); int val = p.getStatus(); assertTrue((val == 1)); } public class Provider { public int getStatus() { B b = new B("test"); return b.getStatus(); } } public final class A { private void init() { // ...do soemthing } private static A a; private A() { } public static A getInstance() { if (a == null) { a = new A(); a.init(); } return a; } } public final class B { public B() { } public B(String s) { this(A.getInstance(), s); } public B(A a, String s) { } public int getStatus() { return 0; } } On debug, I find that its the actual class B instance created and not the mock instance that is returned for new usage and assertion fails. Any pointers on how to get this working. Thanks

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  • How to Declare Complex Nested C# Type for Web Service

    - by TheArtTrooper
    I would like to create a service that accepts a complex nested type. In a sample asmx file I created: [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. // [System.Web.Script.Services.ScriptService] public class ServiceNest : System.Web.Services.WebService { public class Block { [XmlElement(IsNullable = false)] public int number; } public class Cell { [XmlElement(IsNullable = false)] public Block block; } public class Head { [XmlElement(IsNullable = false)] public Cell cell; } public class Nest { public Head head; } [WebMethod] public void TakeNest(Nest nest) { } } When I view the asmx file in IE the test page shows the example SOAP post request as: <?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <TakeNest xmlns="http://schemas.intellicorp.com/livecompare/"> <nest> <head> <cell> <block xsi:nil="true" /> </cell> </head> </nest> </TakeNest> </soap:Body> </soap:Envelope> It hasn't expanded the <block> into its number member. Looking at the WSDL, the types all look good. So is this just a limitation of the post demo page creator? Thanks.

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  • PHP use of undefined constant error

    - by user272899
    Using a great script to grab details from imdb, I would like to thank Fabian Beiner. Just one error i have encountered with it is: Use of undefined constant sys_get_temp_dir assumed 'sys_get_temp_dir' in '/path/to/directory' on line 49 This is the complete script <?php /** * IMDB PHP Parser * * This class can be used to retrieve data from IMDB.com with PHP. This script will fail once in * a while, when IMDB changes *anything* on their HTML. Guys, it's time to provide an API! * * @link http://fabian-beiner.de * @copyright 2010 Fabian Beiner * @author Fabian Beiner (mail [AT] fabian-beiner [DOT] de) * @license MIT License * * @version 4.1 (February 1st, 2010) * */ class IMDB { private $_sHeader = null; private $_sSource = null; private $_sUrl = null; private $_sId = null; public $_bFound = false; private $_oCookie = '/tmp/imdb-grabber-fb.tmp'; const IMDB_CAST = '#<a href="/name/(\w+)/" onclick="\(new Image\(\)\)\.src=\'/rg/castlist/position-(\d|\d\d)/images/b\.gif\?link=/name/(\w+)/\';">(.*)</a>#Ui'; const IMDB_COUNTRY = '#<a href="/Sections/Countries/(\w+)/">#Ui'; const IMDB_DIRECTOR = '#<a href="/name/(\w+)/" onclick="\(new Image\(\)\)\.src=\'/rg/directorlist/position-(\d|\d\d)/images/b.gif\?link=name/(\w+)/\';">(.*)</a><br/>#Ui'; const IMDB_GENRE = '#<a href="/Sections/Genres/(\w+|\w+\-\w+)/">(\w+|\w+\-\w+)</a>#Ui'; const IMDB_MPAA = '#<h5><a href="/mpaa">MPAA</a>:</h5>\s*<div class="info-content">\s*(.*)\s*</div>#Ui'; const IMDB_PLOT = '#<h5>Plot:</h5>\s*<div class="info-content">\s*(.*)\s*<a#Ui'; const IMDB_POSTER = '#<a name="poster" href="(.*)" title="(.*)"><img border="0" alt="(.*)" title="(.*)" src="(.*)" /></a>#Ui'; const IMDB_RATING = '#<b>(\d\.\d/10)</b>#Ui'; const IMDB_RELEASE_DATE = '#<h5>Release Date:</h5>\s*\s*<div class="info-content">\s*(.*) \((.*)\)#Ui'; const IMDB_RUNTIME = '#<h5>Runtime:</h5>\s*<div class="info-content">\s*(.*)\s*</div>#Ui'; const IMDB_SEARCH = '#<b>Media from&nbsp;<a href="/title/tt(\d+)/"#i'; const IMDB_TAGLINE = '#<h5>Tagline:</h5>\s*<div class="info-content">\s*(.*)\s*</div>#Ui'; const IMDB_TITLE = '#<title>(.*) \((.*)\)</title>#Ui'; const IMDB_URL = '#http://(.*\.|.*)imdb.com/(t|T)itle(\?|/)(..\d+)#i'; const IMDB_VOTES = '#&nbsp;&nbsp;<a href="ratings" class="tn15more">(.*) votes</a>#Ui'; const IMDB_WRITER = '#<a href="/name/(\w+)/" onclick="\(new Image\(\)\)\.src=\'/rg/writerlist/position-(\d|\d\d)/images/b\.gif\?link=name/(\w+)/\';">(.*)</a>#Ui'; const IMDB_REDIRECT = '#Location: (.*)#'; /** * Public constructor. * * @param string $sSearch */ public function __construct($sSearch) { if (function_exists(sys_get_temp_dir)) { $this->_oCookie = tempnam(sys_get_temp_dir(), 'imdb'); } $sUrl = $this->findUrl($sSearch); if ($sUrl) { $bFetch = $this->fetchUrl($this->_sUrl); $this->_bFound = true; } } /** * Little REGEX helper. * * @param string $sRegex * @param string $sContent * @param int $iIndex; */ private function getMatch($sRegex, $sContent, $iIndex = 1) { preg_match($sRegex, $sContent, $aMatches); if ($iIndex > count($aMatches)) return; if ($iIndex == null) { return $aMatches; } return $aMatches[(int)$iIndex]; } /** * Little REGEX helper, I should find one that works for both... ;/ * * @param string $sRegex * @param int $iIndex; */ private function getMatches($sRegex, $iIndex = null) { preg_match_all($sRegex, $this->_sSource, $aMatches); if ((int)$iIndex) return $aMatches[$iIndex]; return $aMatches; } /** * Save an image. * * @param string $sUrl */ private function saveImage($sUrl) { $sUrl = trim($sUrl); $bolDir = false; if (!is_dir(getcwd() . '/posters')) { if (mkdir(getcwd() . '/posters', 0777)) { $bolDir = true; } } $sFilename = getcwd() . '/posters/' . preg_replace("#[^0-9]#", "", basename($sUrl)) . '.jpg'; if (file_exists($sFilename)) { return 'posters/' . basename($sFilename); } if (is_dir(getcwd() . '/posters') OR $bolDir) { if (function_exists('curl_init')) { $oCurl = curl_init($sUrl); curl_setopt_array($oCurl, array ( CURLOPT_VERBOSE => 0, CURLOPT_HEADER => 0, CURLOPT_RETURNTRANSFER => 1, CURLOPT_TIMEOUT => 5, CURLOPT_CONNECTTIMEOUT => 5, CURLOPT_REFERER => $sUrl, CURLOPT_BINARYTRANSFER => 1)); $sOutput = curl_exec($oCurl); curl_close($oCurl); $oFile = fopen($sFilename, 'x'); fwrite($oFile, $sOutput); fclose($oFile); return 'posters/' . basename($sFilename); } else { $oImg = imagecreatefromjpeg($sUrl); imagejpeg($oImg, $sFilename); return 'posters/' . basename($sFilename); } return false; } return false; } /** * Find a valid Url out of the passed argument. * * @param string $sSearch */ private function findUrl($sSearch) { $sSearch = trim($sSearch); if ($aUrl = $this->getMatch(self::IMDB_URL, $sSearch, 4)) { $this->_sId = 'tt' . preg_replace('[^0-9]', '', $aUrl); $this->_sUrl = 'http://www.imdb.com/title/' . $this->_sId .'/'; return true; } else { $sTemp = 'http://www.imdb.com/find?s=all&q=' . str_replace(' ', '+', $sSearch) . '&x=0&y=0'; $bFetch = $this->fetchUrl($sTemp); if( $this->isRedirect() ) { return true; } else if ($bFetch) { if ($strMatch = $this->getMatch(self::IMDB_SEARCH, $this->_sSource)) { $this->_sUrl = 'http://www.imdb.com/title/tt' . $strMatch . '/'; unset($this->_sSource); return true; } } } return false; } /** * Find if result is redirected directly to exact movie. */ private function isRedirect() { if ($strMatch = $this->getMatch(self::IMDB_REDIRECT, $this->_sHeader)) { $this->_sUrl = $strMatch; unset($this->_sSource); unset($this->_sHeader); return true; } return false; } /** * Fetch data from given Url. * Uses cURL if installed, otherwise falls back to file_get_contents. * * @param string $sUrl * @param int $iTimeout; */ private function fetchUrl($sUrl, $iTimeout = 15) { $sUrl = trim($sUrl); if (function_exists('curl_init')) { $oCurl = curl_init($sUrl); curl_setopt_array($oCurl, array ( CURLOPT_VERBOSE => 0, CURLOPT_HEADER => 1, CURLOPT_FRESH_CONNECT => true, CURLOPT_RETURNTRANSFER => 1, CURLOPT_TIMEOUT => (int)$iTimeout, CURLOPT_CONNECTTIMEOUT => (int)$iTimeout, CURLOPT_REFERER => $sUrl, CURLOPT_FOLLOWLOCATION => 0, CURLOPT_COOKIEFILE => $this->_oCookie, CURLOPT_COOKIEJAR => $this->_oCookie, CURLOPT_USERAGENT => 'Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6' )); $sOutput = curl_exec($oCurl); if ($sOutput === false) { return false; } $aInfo = curl_getinfo($oCurl); if ($aInfo['http_code'] != 200 && $aInfo['http_code'] != 302) { return false; } $sTmpHeader = strpos($sOutput, "\r\n\r\n"); $this->_sHeader = substr($sOutput, 0, $sTmpHeader); $this->_sSource = str_replace("\n", '', substr($sOutput, $sTmpHeader+1)); curl_close($oCurl); return true; } else { $sOutput = @file_get_contents($sUrl, 0); if (strpos($http_response_header[0], '200') === false){ return false; } $this->_sSource = str_replace("\n", '', (string)$sOutput); return true; } return false; } /** * Returns the cast. */ public function getCast($iOutput = null, $bMore = true) { if ($this->_sSource) { $sReturned = $this->getMatches(self::IMDB_CAST, 4); if (is_array($sReturned)) { if ($iOutput) { foreach ($sReturned as $i => $sName) { if ($i >= $iOutput) break; $sReturn[] = $sName; } return implode(' / ', $sReturn) . (($bMore) ? '&hellip;' : ''); } return implode(' / ', $sReturned); } return $sReturned; } return 'n/A'; } /** * Returns the cast as links. */ public function getCastAsUrl($iOutput = null, $bMore = true) { if ($this->_sSource) { $sReturned1 = $this->getMatches(self::IMDB_CAST, 4); $sReturned2 = $this->getMatches(self::IMDB_CAST, 3); if (is_array($sReturned1)) { if ($iOutput) { foreach ($sReturned1 as $i => $sName) { if ($i >= $iOutput) break; $aReturn[] = '<a href="http://www.imdb.com/name/' . $sReturned2[$i] . '/">' . $sName . '</a>';; } return implode(' / ', $aReturn) . (($bMore) ? '&hellip;' : ''); } return implode(' / ', $sReturned); } return '<a href="http://www.imdb.com/name/' . $sReturned2 . '/">' . $sReturned1 . '</a>';; } return 'n/A'; } /** * Returns the countr(y|ies). */ public function getCountry() { if ($this->_sSource) { $sReturned = $this->getMatches(self::IMDB_COUNTRY, 1); if (is_array($sReturned)) { return implode(' / ', $sReturned); } return $sReturned; } return 'n/A'; } /** * Returns the countr(y|ies) as link(s). */ public function getCountryAsUrl() { if ($this->_sSource) { $sReturned = $this->getMatches(self::IMDB_COUNTRY, 1); if (is_array($sReturned)) { foreach ($sReturned as $sCountry) { $aReturn[] = '<a href="http://www.imdb.com/Sections/Countries/' . $sCountry . '/">' . $sCountry . '</a>'; } return implode(' / ', $aReturn); } return '<a href="http://www.imdb.com/Sections/Countries/' . $sReturned . '/">' . $sReturned . '</a>'; } return 'n/A'; } /** * Returns the director(s). */ public function getDirector() { if ($this->_sSource) { $sReturned = $this->getMatches(self::IMDB_DIRECTOR, 4); if (is_array($sReturned)) { return implode(' / ', $sReturned); } return $sReturned; } return 'n/A'; } /** * Returns the director(s) as link(s). */ public function getDirectorAsUrl() { if ($this->_sSource) { $sReturned1 = $this->getMatches(self::IMDB_DIRECTOR, 4); $sReturned2 = $this->getMatches(self::IMDB_DIRECTOR, 1); if (is_array($sReturned1)) { foreach ($sReturned1 as $i => $sDirector) { $aReturn[] = '<a href="http://www.imdb.com/name/' . $sReturned2[$i] . '/">' . $sDirector . '</a>'; } return implode(' / ', $aReturn); } return '<a href="http://www.imdb.com/name/' . $sReturned2 . '/">' . $sReturned1 . '</a>'; } return 'n/A'; } /** * Returns the genre(s). */ public function getGenre() { if ($this->_sSource) { $sReturned = $this->getMatches(self::IMDB_GENRE, 1); if (is_array($sReturned)) { return implode(' / ', $sReturned); } return $sReturned; } return 'n/A'; } /** * Returns the genre(s) as link(s). */ public function getGenreAsUrl() { if ($this->_sSource) { $sReturned = $this->getMatches(self::IMDB_GENRE, 1); if (is_array($sReturned)) { foreach ($sReturned as $i => $sGenre) { $aReturn[] = '<a href="http://www.imdb.com/Sections/Genres/' . $sGenre . '/">' . $sGenre . '</a>'; } return implode(' / ', $aReturn); } return '<a href="http://www.imdb.com/Sections/Genres/' . $sReturned . '/">' . $sReturned . '</a>'; } return 'n/A'; } /** * Returns the mpaa. */ public function getMpaa() { if ($this->_sSource) { return implode('' , $this->getMatches(self::IMDB_MPAA, 1)); } return 'n/A'; } /** * Returns the plot. */ public function getPlot() { if ($this->_sSource) { return implode('' , $this->getMatches(self::IMDB_PLOT, 1)); } return 'n/A'; } /** * Download the poster, cache it and return the local path to the image. */ public function getPoster() { if ($this->_sSource) { if ($sPoster = $this->saveImage(implode("", $this->getMatches(self::IMDB_POSTER, 5)), 'poster.jpg')) { return $sPoster; } return implode('', $this->getMatches(self::IMDB_POSTER, 5)); } return 'n/A'; } /** * Returns the rating. */ public function getRating() { if ($this->_sSource) { return implode('', $this->getMatches(self::IMDB_RATING, 1)); } return 'n/A'; } /** * Returns the release date. */ public function getReleaseDate() { if ($this->_sSource) { return implode('', $this->getMatches(self::IMDB_RELEASE_DATE, 1)); } return 'n/A'; } /** * Returns the runtime of the current movie. */ public function getRuntime() { if ($this->_sSource) { return implode('', $this->getMatches(self::IMDB_RUNTIME, 1)); } return 'n/A'; } /** * Returns the tagline. */ public function getTagline() { if ($this->_sSource) { return implode('', $this->getMatches(self::IMDB_TAGLINE, 1)); } return 'n/A'; } /** * Get the release date of the current movie. */ public function getTitle() { if ($this->_sSource) { return implode('', $this->getMatches(self::IMDB_TITLE, 1)); } return 'n/A'; } /** * Returns the url. */ public function getUrl() { return $this->_sUrl; } /** * Get the votes of the current movie. */ public function getVotes() { if ($this->_sSource) { return implode('', $this->getMatches(self::IMDB_VOTES, 1)); } return 'n/A'; } /** * Get the year of the current movie. */ public function getYear() { if ($this->_sSource) { return implode('', $this->getMatches(self::IMDB_TITLE, 2)); } return 'n/A'; } /** * Returns the writer(s). */ public function getWriter() { if ($this->_sSource) { $sReturned = $this->getMatches(self::IMDB_WRITER, 4); if (is_array($sReturned)) { return implode(' / ', $sReturned); } return $sReturned; } return 'n/A'; } /** * Returns the writer(s) as link(s). */ public function getWriterAsUrl() { if ($this->_sSource) { $sReturned1 = $this->getMatches(self::IMDB_WRITER, 4); $sReturned2 = $this->getMatches(self::IMDB_WRITER, 1); if (is_array($sReturned1)) { foreach ($sReturned1 as $i => $sWriter) { $aReturn[] = '<a href="http://www.imdb.com/name/' . $sReturned2[$i] . '/">' . $sWriter . '</a>'; } return implode(' / ', $aReturn); } return '<a href="http://www.imdb.com/name/' . $sReturned2 . '/">' . $sReturned1 . '</a>'; } return 'n/A'; } } ?>

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  • MySQL access classes in PHP

    - by Mike
    I have a connection class for MySQL that looks like this: class MySQLConnect { private $connection; private static $instances = 0; function __construct() { if(MySQLConnect::$instances == 0) { //Connect to MySQL server $this->connection = mysql_connect(MySQLConfig::HOST, MySQLConfig::USER, MySQLConfig::PASS) or die("Error: Unable to connect to the MySQL Server."); MySQLConnect::$instances = 1; } else { $msg = "Close the existing instance of the MySQLConnector class."; die($msg); } } public function singleQuery($query, $databasename) { mysql_select_db(MySQLConfig::DB, $this->connection) or die("Error: Could not select database " . MySQLConfig::DB . " from the server."); $result = mysql_query($query) or die('Query failed.'); return $result; } public function createResultSet($query, $databasename) { $rs = new MySQLResultSet($query, MySQLConfig::DB, $this->connection ) ; return $rs; } public function close() { MySQLConnect::$instances = 0; if(isset($this->connection) ) { mysql_close($this->connection) ; unset($this->connection) ; } } public function __destruct() { $this->close(); } } The MySQLResultSet class looks like this: class MySQLResultSet implements Iterator { private $query; private $databasename; private $connection; private $result; private $currentRow; private $key = 0; private $valid; public function __construct($query, $databasename, $connection) { $this->query = $query; //Select the database $selectedDatabase = mysql_select_db($databasename, $connection) or die("Error: Could not select database " . $this->dbname . " from the server."); $this->result = mysql_query($this->query) or die('Query failed.'); $this->rewind(); } public function getResult() { return $this->result; } // public function getRow() // { // return mysql_fetch_row($this->result); // } public function getNumberRows() { return mysql_num_rows($this->result); } //current() returns the current row public function current() { return $this->currentRow; } //key() returns the current index public function key() { return $this->key; } //next() moves forward one index public function next() { if($this->currentRow = mysql_fetch_array($this->result) ) { $this->valid = true; $this->key++; }else{ $this->valid = false; } } //rewind() moves to the starting index public function rewind() { $this->key = 0; if(mysql_num_rows($this->result) > 0) { if(mysql_data_seek($this->result, 0) ) { $this->valid = true; $this->key = 0; $this->currentRow = mysql_fetch_array($this->result); } } else { $this->valid = false; } } //valid returns 1 if the current position is a valid array index //and 0 if it is not valid public function valid() { return $this->valid; } } The following class is an example of how I am accessing the database: class ImageCount { public function getCount() { $mysqlConnector = new MySQLConnect(); $query = "SELECT * FROM images;"; $resultSet = $mysqlConnector->createResultSet($query, MySQLConfig::DB); $mysqlConnector->close(); return $resultSet->getNumberRows(); } } I use the ImageCount class like this: if(!ImageCount::getCount()) { //Do something } Question: Is this an okay way to access the database? Could anybody recommend an alternative method if it is bad? Thank-you.

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  • Live wallpaper settings not applying

    - by Steve
    I have added settings to my live wallpaper but they are not being applied when changed. I would greatly appreciate it if someone could tell me why my settings are not being applied when changed. Here is my code: settings.xml <PreferenceCategory android:title="@string/more"> <PreferenceScreen android:title="@string/more"> <intent android:action="android.intent.action.VIEW" android:data="market://search?q=pub:PSP Demo Center" /> </PreferenceScreen> <ListPreference android:persistent="true" android:enabled="true" android:entries="@array/settings_light_number_options" android:title="@string/settings_light_number" android:key="light_power" android:summary="@string/settings_light_number_summary" android:defaultValue="3" android:entryValues="@array/settings_light_number_optionvalues" /> <ListPreference android:persistent="true" android:enabled="false" android:entries="@array/settings_speed_number_options" android:title="@string/settings_speed_number" android:key="speed" android:summary="@string/settings_speed_number_summary" android:defaultValue="10" android:entryValues="@array/settings_speed_number_optionvalues" /> <ListPreference android:persistent="true" android:enabled="false" android:entries="@array/settings_rotate_number_options" android:title="@string/settings_rotate_number" android:key="rotate" android:summary="@string/settings_rotate_number_summary" android:defaultValue="8000" android:entryValues="@array/settings_rotate_number_optionvalues" /> </PreferenceCategory> </PreferenceScreen> Settings.java public class GraffitiLWPSettings extends PreferenceActivity implements SharedPreferences .OnSharedPreferenceChangeListener { public static final String SHARED_PREFS_NAME = "wallpaper_settings"; protected void onCreate(Bundle icicle) { super.onCreate(icicle); getPreferenceManager(). setSharedPreferencesName(GraffitiLWP.SHARED_PREFS_NAME); addPreferencesFromResource(R.xml.settings); getPreferenceManager().getSharedPreferences(). registerOnSharedPreferenceChangeListener(this); } protected void onResume() { super.onResume(); } protected void onDestroy() { getPreferenceManager().getSharedPreferences() .unregisterOnSharedPreferenceChangeListener(this); super.onDestroy(); } public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) { } } wallpaper.java public class GraffitiLWP extends Wallpaper { private GraffitiLWPRenderer mRenderer; public static final String SHARED_PREFS_NAME = "wallpaper_settings"; public Engine onCreateEngine() { mRenderer = new GraffitiLWPRenderer(this); return new WallpaperEngine( this.getSharedPreferences(SHARED_PREFS_NAME, Context.MODE_PRIVATE), getBaseContext(), mRenderer); } } renderer.java public class GraffitiLWPRenderer extends RajawaliRenderer { private Animation3D mAnim; private BaseObject3D mCan; private SettingsUpdater settingsUpdater; //private SharedPreferences preferences; public GraffitiLWPRenderer(Context context) { super(context); setFrameRate(20); } public class SettingsUpdater implements SharedPreferences .OnSharedPreferenceChangeListener { private GraffitiLWPRenderer renderer; public SettingsUpdater(GraffitiLWPRenderer renderer) { this.renderer = renderer; } public void onSharedPreferenceChanged( SharedPreferences sharedPreferences, String key) { preferences.getInt("wallpaper_settings", 0); renderer.setSharedPreferences(preferences); } } public void initScene() { System.gc(); ALight light = new DirectionalLight(); light.setPower(this.preferences.getLong("light_power", 3)); light.setPosition(0, 0, -10); mCamera.setPosition(0, -1, -7); mCamera.setLookAt(0, 2, 0); mCamera.setFarPlane(1000); ObjParser parser = new ObjParser(mContext .getResources(), mTextureManager, R.raw.spraycan_obj); parser.parse(); mCan = parser.getParsedObject(); mCan.addLight(light); mCan.setScale(1.2f); addChild(mCan); Number3D axis = new Number3D(0, this.preferences.getLong("speed", 10), 0); axis.normalize(); mAnim = new RotateAnimation3D(axis, 360); mAnim.setDuration(this.preferences.getLong("rotate", 8000)); mAnim.setRepeatCount(Animation3D.INFINITE); mAnim.setInterpolator(new AccelerateDecelerateInterpolator()); mAnim.setTransformable3D(mCan); setSkybox(R.drawable.posz, R.drawable.posx, R.drawable.negz, R.drawable.negx, R.drawable.posy, R.drawable.negy); } public void onSurfaceCreated(GL10 gl, EGLConfig config) { settingsUpdater = new SettingsUpdater(this); this.preferences.registerOnSharedPreferenceChangeListener( settingsUpdater); settingsUpdater.onSharedPreferenceChanged(preferences, null); super.onSurfaceCreated(gl, config); mAnim.start(); } public void onDrawFrame(GL10 glUnused) { super.onDrawFrame(glUnused); mSkybox.setRotY(mSkybox.getRotY() + .5f); } } I know the code is long but I would greatly appreciate any help that someone could give me. Thank you.

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  • Using C code in c#

    - by karthik
    When i googled to find the way to change the window style i could find the code in "C" language How can i use the snippet below in my c# application, so that i can hide the Title Bar of external application ? I have not used "C" before.. //Finds a window by class name [DllImport("USER32.DLL")] public static extern IntPtr FindWindow(string lpClassName, string lpWindowName); //Sets a window to be a child window of another window [DllImport("USER32.DLL")] public static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent); //Sets window attributes [DllImport("USER32.DLL")] public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong); //Gets window attributes [DllImport("USER32.DLL")] public static extern int GetWindowLong(IntPtr hWnd, int nIndex); //assorted constants needed public static int GWL_STYLE = -16; public static int WS_CHILD = 0x40000000; //child window public static int WS_BORDER = 0x00800000; //window with border public static int WS_DLGFRAME = 0x00400000; //window with double border but no title public static int WS_CAPTION= WS_BORDER | WS_DLGFRAME; //window with a title bar /* This function sets the parent of the window with class ClassClass to the form/control the method is in. */ public void Reparent() { //get handle of parent form (.net property) IntPtr par = this.Handle; //get handle of child form (win32) IntPtr child = FindWindow("ClassClass", null); //set parent of child form SetParent(child, par); //get current window style of child form int style = GetWindowLong(child, GWL_STYLE); //take current window style and remove WS_CAPTION from it SetWindowLong(child, GWL_STYLE, (style & ~WS_CAPTION)); }

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  • S#harp architecture mapping many to many and ado.net data services: A single resource was expected f

    - by Leg10n
    Hi, I'm developing an application that reads data from a SQL server database (migrated from a legacy DB) with nHibernate and s#arp architecture through ADO.NET Data services. I'm trying to map a many-to-many relationship. I have a Error class: public class Error { public virtual int ERROR_ID { get; set; } public virtual string ERROR_CODE { get; set; } public virtual string DESCRIPTION { get; set; } public virtual IList<ErrorGroup> GROUPS { get; protected set; } } And then I have the error group class: public class ErrorGroup { public virtual int ERROR_GROUP_ID {get; set;} public virtual string ERROR_GROUP_NAME { get; set; } public virtual string DESCRIPTION { get; set; } public virtual IList<Error> ERRORS { get; protected set; } } And the overrides: public class ErrorGroupOverride : IAutoMappingOverride<ErrorGroup> { public void Override(AutoMapping<ErrorGroup> mapping) { mapping.Table("ERROR_GROUP"); mapping.Id(x => x.ERROR_GROUP_ID, "ERROR_GROUP_ID"); mapping.IgnoreProperty(x => x.Id); mapping.HasManyToMany<Error>(x => x.Error) .Table("ERROR_GROUP_LINK") .ParentKeyColumn("ERROR_GROUP_ID") .ChildKeyColumn("ERROR_ID").Inverse().AsBag(); } } public class ErrorOverride : IAutoMappingOverride<Error> { public void Override(AutoMapping<Error> mapping) { mapping.Table("ERROR"); mapping.Id(x => x.ERROR_ID, "ERROR_ID"); mapping.IgnoreProperty(x => x.Id); mapping.HasManyToMany<ErrorGroup>(x => x.GROUPS) .Table("ERROR_GROUP_LINK") .ParentKeyColumn("ERROR_ID") .ChildKeyColumn("ERROR_GROUP_ID").AsBag(); } } When I view the Data service in the browser like: http://localhost:1905/DataService.svc/Errors it shows the list of errors with no problems, and using it like http://localhost:1905/DataService.svc/Errors(123) works too. The Problem When I want to see the Errors in a group or the groups form an error, like: "http://localhost:1905/DataService.svc/Errors(123)?$expand=GROUPS" I get the XML Document, but the browser says: The XML page cannot be displayed Cannot view XML input using XSL style sheet. Please correct the error and then click the Refresh button, or try again later. -------------------------------------------------------------------------------- Only one top level element is allowed in an XML document. Error processing resource 'http://localhost:1905/DataServic... <error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"> -^ I view the sourcecode, and I get the data. However it comes with an exception: <error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"> <code></code> <message xml:lang="en-US">An error occurred while processing this request.</message> <innererror xmlns="xmlns"> <message>A single resource was expected for the result, but multiple resources were found.</message> <type>System.InvalidOperationException</type> <stacktrace> at System.Data.Services.Serializers.Serializer.WriteRequest(IEnumerator queryResults, Boolean hasMoved)&#xD; at System.Data.Services.ResponseBodyWriter.Write(Stream stream)</stacktrace> </innererror> </error> A I missing something??? Where does this error come from?

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  • Using IOperationBehavior to supply a WCF parameter

    - by Chris Kemp
    This is my first step into the world of stackoverflow, so apologies if I cock anything up. I'm trying to create a WCF Operation which has a parameter that is not exposed to the outside world, but is instead automatically passed into the function. So the world sees this: int Add(int a, int b) But it is implemented as: int Add(object context, int a, int b) Then, the context gets supplied by the system at run-time. The example I'm working with is completely artificial, but mimics something that I'm looking into in a real-world scenario. I'm able to get close, but not quite the whole way there. First off, I created a simple method and wrote an application to confirm it works. It does. It returns a + b and writes the context as a string to my debug. Yay. [OperationContract] int Add(object context, int a, int b); I then wrote the following code: public class SupplyContextAttribute : Attribute, IOperationBehavior { public void Validate(OperationDescription operationDescription) { if (!operationDescription.Messages.Any(m => m.Body.Parts.First().Name == "context")) throw new FaultException("Parameter 'context' is missing."); } public void ApplyDispatchBehavior(OperationDescription operationDescription, DispatchOperation dispatchOperation) { dispatchOperation.Invoker = new SupplyContextInvoker(dispatchOperation.Invoker); } public void ApplyClientBehavior(OperationDescription operationDescription, ClientOperation clientOperation) { } public void AddBindingParameters(OperationDescription operationDescription, BindingParameterCollection bindingParameters) { // Remove the 'context' parameter from the inbound message operationDescription.Messages[0].Body.Parts.RemoveAt(0); } } public class SupplyContextInvoker : IOperationInvoker { readonly IOperationInvoker _invoker; public SupplyContextInvoker(IOperationInvoker invoker) { _invoker = invoker; } public object[] AllocateInputs() { return _invoker.AllocateInputs().Skip(1).ToArray(); } private object[] IntroduceContext(object[] inputs) { return new[] { "MyContext" }.Concat(inputs).ToArray(); } public object Invoke(object instance, object[] inputs, out object[] outputs) { return _invoker.Invoke(instance, IntroduceContext(inputs), out outputs); } public IAsyncResult InvokeBegin(object instance, object[] inputs, AsyncCallback callback, object state) { return _invoker.InvokeBegin(instance, IntroduceContext(inputs), callback, state); } public object InvokeEnd(object instance, out object[] outputs, IAsyncResult result) { return _invoker.InvokeEnd(instance, out outputs, result); } public bool IsSynchronous { get { return _invoker.IsSynchronous; } } } And my WCF operation now looks like this: [OperationContract, SupplyContext] int Amend(object context, int a, int b); My updated references no longer show the 'context' parameter, which is exactly what I want. The trouble is that whenver I run the code, it gets past the AllocateInputs and then throws an Index was outside the bounds of the Array. error somewhere in the WCF guts. I've tried other things, and I find that I can successfully change the type of the parameter and rename it and have my code work. But the moment I remove the parameter it falls over. Can anyone give me some idea of how to get this to work (or if it can be done at all).

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  • How do you Remove an Invalid Remote Branch Reference from Git?

    - by Casey
    In my current repo I have the following output: $ git branch -a * master remotes/origin/master remotes/public/master I want to delete 'remotes/public/master' from the branch list: $ git branch -d remotes/public/master error: branch 'remotes/public/master' not found. Also, the output of 'git remote' is strange, since it does not list 'public': $ git remote show origin How can I delete 'remotes/public/master' from the branch list? Update, tried the 'git push' command: $ git push public :master fatal: 'public' does not appear to be a git repository fatal: The remote end hung up unexpectedly Solution: The accepted answer had the solution at the bottom! git gc --prune=now

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  • Castle, sharing a transient component between a decorator and a decorated component

    - by Marius
    Consider the following example: public interface ITask { void Execute(); } public class LoggingTaskRunner : ITask { private readonly ITask _taskToDecorate; private readonly MessageBuffer _messageBuffer; public LoggingTaskRunner(ITask taskToDecorate, MessageBuffer messageBuffer) { _taskToDecorate = taskToDecorate; _messageBuffer = messageBuffer; } public void Execute() { _taskToDecorate.Execute(); Log(_messageBuffer); } private void Log(MessageBuffer messageBuffer) {} } public class TaskRunner : ITask { public TaskRunner(MessageBuffer messageBuffer) { } public void Execute() { } } public class MessageBuffer { } public class Configuration { public void Configure() { IWindsorContainer container = null; container.Register( Component.For<MessageBuffer>() .LifeStyle.Transient); container.Register( Component.For<ITask>() .ImplementedBy<LoggingTaskRunner>() .ServiceOverrides(ServiceOverride.ForKey("taskToDecorate").Eq("task.to.decorate"))); container.Register( Component.For<ITask>() .ImplementedBy<TaskRunner>() .Named("task.to.decorate")); } } How can I make Windsor instantiate the "shared" transient component so that both "Decorator" and "Decorated" gets the same instance? Edit: since the design is being critiqued I am posting something closer to what is being done in the app. Maybe someone can suggest a better solution (if sharing the transient resource between a logger and the true task is considered a bad design)

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  • JAVA Inheritance Generics and Casting.

    - by James Moore
    Hello, I have two classes which both extends Example. public class ClassA extends Example { public ClassA() { super("a", "class"); } .... } public class ClassB extends Example { public ClassB() { super("b", "class"); } .... } public class Example () { public String get(String x, String y) { return "Hello"; } } So thats all very well. So suppose we have another class called ExampleManager. With example manager I want to use a generic type and consequently return that generic type. e.g. public class ExampleManager<T extends Example> { public T getExample() { return new T("example","example"); // So what exactly goes here? } } So where I am returning my generic type how do i get this to actually work correctly and cast Example as either classA or classB? Many Thanks

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  • Only error showing is null, rss feed reader not working

    - by Callum
    I have been following a tutorial which is showing me how to create an rssfeed reader, I come to the end of the tutorial; and the feed is not displaying in the listView. So I am looking for errors in logCat, but the only one I can find is one just saying 'null', which is not helpful at all. Can anyone spot a potential problem with the code I have written? Thanks. DirectRSS(main class): package com.example.rssapplication; import java.util.List; import android.app.ListActivity; import android.content.pm.ActivityInfo; import android.os.Bundle; import android.util.Log; import android.widget.ArrayAdapter; import android.widget.ListView; public class DirectRSS extends ListActivity{ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.directrss); //Set to portrait, so that every time the view changes; it does not run the DB query again... setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); try{ RssReader1 rssReader = new RssReader1("http://www.skysports.com/rss/0,20514,11661,00.xml"); ListView list = (ListView)findViewById(R.id.list); ArrayAdapter<RssItem1> adapter = new ArrayAdapter<RssItem1>(this, android.R.layout.simple_list_item_1); list.setAdapter(adapter); list.setOnItemClickListener(new ListListener1(rssReader.getItems(),this)); }catch(Exception e) { String err = (e.getMessage()==null)?"SD Card failed": e.getMessage(); Log.e("sdcard-err2:",err + " " + e.getMessage()); // Log.e("Error", e.getMessage()); Log.e("LOGCAT", "" + e.getMessage()); } } } ListListener1: package com.example.rssapplication; import java.util.List; import android.app.Activity; import android.content.Intent; import android.net.Uri; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; public class ListListener1 implements OnItemClickListener{ List<RssItem1> listItems; Activity activity; public ListListener1(List<RssItem1> listItems, Activity activity) { this.listItems = listItems; this.activity = activity; } @Override public void onItemClick(AdapterView<?> parent, View view, int pos, long id) { // TODO Auto-generated method stub Intent i = new Intent(Intent.ACTION_VIEW); i.setData(Uri.parse(listItems.get(pos).getLink())); activity.startActivity(i); } } RssItem1: package com.example.rssapplication; public class RssItem1 { private String title; private String link; public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getLink() { return link; } public void setLink(String link) { this.link = link; } } RssParseHandler1: package com.example.rssapplication; import java.util.ArrayList; import java.util.List; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; public class RssParseHandler1 extends DefaultHandler{ private List<RssItem1> rssItems; private RssItem1 currentItem; private boolean parsingTitle; private boolean parsingLink; public RssParseHandler1(){ rssItems = new ArrayList<RssItem1>(); } public List<RssItem1> getItems(){ return rssItems; } @Override public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { if("item".equals(qName)){ currentItem = new RssItem1(); } else if("title".equals(qName)){ parsingTitle = true; } else if("link".equals(qName)){ parsingLink = true; } // TODO Auto-generated method stub super.startElement(uri, localName, qName, attributes); } @Override public void endElement(String uri, String localName, String qName) throws SAXException { if("item".equals(qName)){ rssItems.add(currentItem); currentItem = null; } else if("title".equals(qName)){ parsingTitle = false; } else if("link".equals(qName)){ parsingLink = false; } // TODO Auto-generated method stub super.endElement(uri, localName, qName); } @Override public void characters(char[] ch, int start, int length) throws SAXException { if(parsingTitle) { if(currentItem!=null) { currentItem.setTitle(new String(ch,start,length)); } } else if(parsingLink) { if(currentItem!=null) { currentItem.setLink(new String(ch,start,length)); parsingLink = false; } } // TODO Auto-generated method stub super.characters(ch, start, length); } } RssReader1: package com.example.rssapplication; import java.util.List; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; public class RssReader1 { private String rssUrl; public RssReader1(String rssUrl) { this.rssUrl = rssUrl; } public List<RssItem1> getItems() throws Exception { SAXParserFactory factory = SAXParserFactory.newInstance(); SAXParser saxParser = factory.newSAXParser(); RssParseHandler1 handler = new RssParseHandler1(); saxParser.parse(rssUrl, handler); return handler.getItems(); } } Here is the logCat also: 08-25 11:13:20.803: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:20.803: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:20.803: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:20.813: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:20.813: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:20.813: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:20.813: W/ApplicationPackageManager(26291): getCSCPackageItemText() 08-25 11:13:20.843: D/AbsListView(26291): Get MotionRecognitionManager 08-25 11:13:20.843: E/sdcard-err2:(26291): SD Card failed null 08-25 11:13:20.843: E/LOGCAT(26291): null 08-25 11:13:20.843: D/AbsListView(26291): onVisibilityChanged() is called, visibility : 4 08-25 11:13:20.843: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:20.873: D/AbsListView(26291): onVisibilityChanged() is called, visibility : 0 08-25 11:13:20.883: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:20.903: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:20.933: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:20.963: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:20.973: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:21.323: D/AbsListView(26291): onVisibilityChanged() is called, visibility : 4 08-25 11:13:21.323: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:21.323: D/AbsListView(26291): onVisibilityChanged() is called, visibility : 4 08-25 11:13:21.323: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:21.323: D/AbsListView(26291): onVisibilityChanged() is called, visibility : 4 08-25 11:13:21.323: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:21.323: D/AbsListView(26291): onVisibilityChanged() is called, visibility : 4 08-25 11:13:21.323: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:21.323: D/AbsListView(26291): onVisibilityChanged() is called, visibility : 4 08-25 11:13:21.323: D/AbsListView(26291): unregisterIRListener() is called 08-25 11:13:21.333: D/AbsListView(26291): onVisibilityChanged() is called, visibility : 4 08-25 11:13:21.333: D/AbsListView(26291): unregisterIRListener() is called

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  • c++ to vb.net , problem with callback function

    - by johan
    I'm having a hard time here trying to find a solution for my problem. I'm trying to convert a client API funktion from C++ to VB.NET, and i think have some problems with the callback function. parts of the C++ code: typedef struct{ BYTE m_bRemoteChannel; BYTE m_bSendMode; BYTE m_nImgFormat; // =0 cif ; = 1 qcif char *m_sIPAddress; char *m_sUserName; char *m_sUserPassword; BOOL m_bUserCheck; HWND m_hShowVideo; }CLIENT_VIDEOINFO, *PCLIENT_VIDEOINFO; CPLAYER_API LONG __stdcall MP4_ClientStart(PCLIENT_VIDEOINFO pClientinfo,void(CALLBACK *ReadDataCallBack)(DWORD nPort,UCHAR *pPacketBuffer,DWORD nPacketSize)); void CALLBACK ReadDataCallBack(DWORD nPort,UCHAR *pPacketBuffer,DWORD nPacketSize) { TRACE("%d\n",nPacketSize); } ..... aa5.m_sUserName = "123"; aa5.m_sUserPassword="w"; aa5.m_bUserCheck = TRUE; MP4_ClientSetTTL(64); nn1 = MP4_ClientStart(&aa5,ReadDataCallBack); if (nn1 == -1) { MessageBox("error"); return; } SDK description: MP4_ClientStart This function starts a connection. The format of the call is: LONG __stdcall MP4_ClientStart(PCLIENT_VIDEOINFO pClientinfo, void(*ReadDataCallBack)(DWORD nChannel,UCHAR *pPacketBuffer,DWORD nPacketSize)) Parameters pClientinfo holds the information. of this connection. nChannel holds the channel of card. pPacketBuffer holds the pointer to the receive buffer. nPacketSize holds the length of the receive buffer. Return Values If the function succeeds the return value is the context of this connection. If the function fails the return value is -1. Remarks typedef struct{ BYTE m_bRemoteChannel; BYTE m_bSendMode; BYTE m_bImgFormat; char *m_sIPAddress; char *m_sUserName; char *m_sUserPassword; BOOL m_bUserCheck; HWND m_hShowVideo; } CLIENT_VIDEOINFO, * PCLIENT_VIDEOINFO; m_bRemoteChannel holds the channel which the client wants to connect to. m_bSendMode holds the network mode of the connection. m_bImgFormat : Image format, 0 is main channel video, 1 is sub channel video m_sIPAddress holds the IP address of the server. m_sUserName holds the user’s name. m_sUserPassword holds the user’s password. m_bUserCheck holds the value whether sends the user’s name and password or not. m_hShowVideo holds Handle for this video window. If m_hShowVideo holds NULL, the client can be record only without decoder. If m_bUserCheck is FALSE, we will send m_sUserName and m_sUserPassword as NULL, else we will send each 50 bytes. The length of m_sIPAddress and m_sUserName must be more than 50 bytes. ReadDataCallBack: When the library receives a packet from a server, this callback is called. My VB.Net code: Imports System.Runtime.InteropServices Public Class Form1 Const WM_USER = &H400 Public Structure CLIENT_VIDEOINFO Public m_bRemoteChannel As Byte Public m_bSendMode As Byte Public m_bImgFormat As Byte Public m_sIPAddress As String Public m_sUserName As String Public m_sUserPassword As String Public m_bUserCheck As Boolean Public m_hShowVideo As Long 'hWnd End Structure Public Declare Function MP4_ClientSetNetPort Lib "hikclient.dll" (ByVal dServerPort As Integer, ByVal dClientPort As Integer) As Boolean Public Declare Function MP4_ClientStartup Lib "hikclient.dll" (ByVal nMessage As UInteger, ByVal hWnd As System.IntPtr) As Boolean <DllImport("hikclient.dll")> Public Shared Function MP4_ClientStart(ByVal Clientinfo As CLIENT_VIDEOINFO, ByRef ReadDataCallBack As CALLBACKdel) As Long End Function Public Delegate Sub CALLBACKdel(ByVal nPort As Long, <MarshalAs(UnmanagedType.LPArray)> ByRef pPacketBuffer As Byte(), ByVal nPacketSize As Long) Public Sub CALLBACK(ByVal nPort As Long, <MarshalAs(UnmanagedType.LPArray)> ByRef pPacketBuffer As Byte(), ByVal nPacketSize As Long) End Sub Public mydel As New CALLBACKdel(AddressOf CALLBACK) Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim Clientinfo As New CLIENT_VIDEOINFO() Clientinfo.m_bRemoteChannel = 0 Clientinfo.m_bSendMode = 0 Clientinfo.m_bImgFormat = 0 Clientinfo.m_sIPAddress = "193.168.1.100" Clientinfo.m_sUserName = "1" Clientinfo.m_sUserPassword = "a" Clientinfo.m_bUserCheck = False Clientinfo.m_hShowVideo = Me.Handle 'Nothing MP4_ClientSetNetPort(850, 850) MP4_ClientStartup(WM_USER + 1, Me.Handle) MP4_ClientStart(Clientinfo, mydel) End Sub End Class here is some other examples of the code in: C# http://blog.csdn.net/nenith1981/archive/2007/09/17/1787692.aspx VB ://read.pudn.com/downloads70/sourcecode/graph/250633/MD%E5%AE%A2%E6%88%B7%E7%AB%AF%28VB%29/hikclient.bas__.htm ://read.pudn.com/downloads70/sourcecode/graph/250633/MD%E5%AE%A2%E6%88%B7%E7%AB%AF%28VB%29/Form1.frm__.htm Delphi ://read.pudn.com/downloads91/sourcecode/multimedia/streaming/349759/Delphi_client/Unit1.pas__.htm

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  • Data not synchornizing java sockets

    - by Droid_Interceptor
    I am writing a auction server and client and using a class called BidHandler to deal with the bids another class AuctionItem to deal with the items for auction. The main problem I am having is little synchroization problem. Screen output of client server as can see from the image at 1st it takes the new bid and changes the value of the time to it, but when one the user enters 1.0 the item seems to be changed to that. But later on when the bid changes again to 15.0 it seems to stay at that price. Is there any reason for that. I have included my code below. Sorry if didnt explain this well. This is the auction client import java.io.*; import java.net.*; public class AuctionClient { private AuctionGui gui; private Socket socket; private DataInputStream dataIn; private DataOutputStream dataOut; //Auction Client constructor String name used as identifier for each client to allow server to pick the winning bidder public AuctionClient(String name,String server, int port) { gui = new AuctionGui("Bidomatic 5000"); gui.input.addKeyListener (new EnterListener(this,gui)); gui.addWindowListener(new ExitListener(this)); try { socket = new Socket(server, port); dataIn = new DataInputStream(socket.getInputStream()); dataOut = new DataOutputStream(socket.getOutputStream()); dataOut.writeUTF(name); while (true) { gui.output.append("\n"+dataIn.readUTF()); } } catch (Exception e) { e.printStackTrace(); } } public void sentBid(String bid) { try { dataOut.writeUTF(bid); } catch(IOException e) { e.printStackTrace(); } } public void disconnect() { try { socket.close(); } catch(IOException e) { e.printStackTrace(); } } public static void main (String args[]) throws IOException { if(args.length!=3) { throw new RuntimeException ("Syntax: java AuctionClient <name> <serverhost> <port>"); } int port = Integer.parseInt(args[2]); AuctionClient a = new AuctionClient(args[0],args[1],port); } } The Auction Server import java.io.*; import java.net.*; import java.util.*; public class AuctionServer { public AuctionServer(int port) throws IOException { ServerSocket server = new ServerSocket(port); while(true) { Socket client = server.accept(); DataInputStream in = new DataInputStream(client.getInputStream()); String name = in.readUTF(); System.out.println("New client "+name+" from " +client.getInetAddress()); BidHandler b = new BidHandler (name, client); b.start(); } } public static void main(String args[]) throws IOException { if(args.length != 1) throw new RuntimeException("Syntax: java AuctionServer <port>"); new AuctionServer(Integer.parseInt(args[0])); } } The BidHandler import java.net.*; import java.io.*; import java.util.*; import java.lang.Float; public class BidHandler extends Thread { Socket socket; DataInputStream in; DataOutputStream out; String name; float currentBid = 0.0f; AuctionItem paper = new AuctionItem(" News Paper ", " Free newspaper from 1990 ", 1.0f, false); protected static Vector handlers = new Vector(); public BidHandler(String name, Socket socket) throws IOException { this.name = name; this.socket = socket; in = new DataInputStream (new BufferedInputStream (socket.getInputStream())); out = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream())); } public synchronized void run() { try { broadcast("New bidder has entered the room"); handlers.addElement(this); while(true) { broadcast(paper.getName() + paper.getDescription()+" for sale at: " +paper.getPrice()); while(paper.getStatus() == false) { String message = in.readUTF(); currentBid = Float.parseFloat(message); broadcast("Bidder entered " +currentBid); if(currentBid > paper.getPrice()) { paper.setPrice(currentBid); broadcast("New Higgest Bid is "+paper.getPrice()); } else if(currentBid < paper.getPrice()) { broadcast("Higgest Bid is "+paper.getPrice()); } else if(currentBid == paper.getPrice()) { broadcast("Higgest Bid is "+paper.getPrice()); } } } } catch(IOException ex) { System.out.println("-- Connection to user lost."); } finally { handlers.removeElement(this); broadcast(name+" left"); try { socket.close(); } catch(IOException ex) { System.out.println("-- Socket to user already closed ?"); } } } protected static void broadcast (String message) { synchronized(handlers) { Enumeration e = handlers.elements(); while(e.hasMoreElements()) { BidHandler handler = (BidHandler) e.nextElement(); try { handler.out.writeUTF(message); handler.out.flush(); } catch(IOException ex) { handler = null; } } } } } The AuctionItem Class class AuctionItem { String itemName; String itemDescription; float itemPrice; boolean itemStatus; //Create a new auction item with name, description, price and status public AuctionItem(String name, String description, float price, boolean status) { itemName = name; itemDescription = description; itemPrice = price; itemStatus = status; } //return the price of the item. public synchronized float getPrice() { return itemPrice; } //Set the price of the item. public synchronized void setPrice(float newPrice) { itemPrice = newPrice; } //Get the status of the item public synchronized boolean getStatus() { return itemStatus; } //Set the status of the item public synchronized void setStatus(boolean newStatus) { itemStatus = newStatus; } //Get the name of the item public String getName() { return itemName; } //Get the description of the item public String getDescription() { return itemDescription; } } There is also simple GUI to go with this that seems to be working fine. If anyone wants it will include the GUI code.

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  • Running code when all threads are finished processing.

    - by rich97
    Quick note: Java and Android noob here, I'm open to you telling me I'm stupid (as long as you tell me why.) I have an android application which requires me start multiple threads originating from various classes and only advance to the next activity once all threads have done their job. I also want to add a "failsafe" timeout in case one the the threads takes too long (HTTP request taking too long or something.) I searched Stack Overflow and found a post saying that I should create a class to keep a running total of open threads and then use a timer to poll for when all the threads are completed. I think I've created a working class to do this for me, it's untested as of yet but has no errors showing in eclipse. Is this a correct implementation? Are there any APIs that I should be made aware of (such as classes in the Java or Android APIs that could be used in place of the abstract classes at the bottom of the class?) package com.dmp.geofix.libs; import java.util.ArrayList; import java.util.Iterator; import java.util.Timer; import java.util.TimerTask; public class ThreadMonitor { private Timer timer = null; private TimerTask timerTask = null; private OnSuccess onSuccess = null; private OnError onError = null; private static ArrayList<Thread> threads; private final int POLL_OPEN_THREADS = 100; private final int TIMEOUT = 10000; public ThreadMonitor() { timerTask = new PollThreadsTask(); } public ThreadMonitor(OnSuccess s) { timerTask = new PollThreadsTask(); onSuccess = s; } public ThreadMonitor(OnError e) { timerTask = new PollThreadsTask(); onError = e; } public ThreadMonitor(OnSuccess s, OnError e) { timerTask = new PollThreadsTask(); onSuccess = s; onError = e; } public void start() { Iterator<Thread> i = threads.iterator(); while (i.hasNext()) { i.next().start(); } timer = new Timer(); timer.schedule(timerTask, 0, POLL_OPEN_THREADS); } public void finish() { Iterator<Thread> i = threads.iterator(); while (i.hasNext()) { i.next().interrupt(); } threads.clear(); timer.cancel(); } public void addThread(Thread t) { threads.add(t); } public void removeThread(Thread t) { threads.remove(t); t.interrupt(); } class PollThreadsTask extends TimerTask { private int timeElapsed = 0; @Override public void run() { timeElapsed += POLL_OPEN_THREADS; if (timeElapsed <= TIMEOUT) { if (threads.isEmpty() == false) { if (onSuccess != null) { onSuccess.run(); } } } else { if (onError != null) { onError.run(); } finish(); } } } public abstract class OnSuccess { public abstract void run(); } public abstract class OnError { public abstract void run(); } }

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  • How can I check if a value exists in a list using C#

    - by Samantha J
    I have the following code that gives me a list of id and names from the new ASP.NET MVC5 Identity: var identityStore = new IdentityStore(); var users = ( from user in identityStore.DbContext.Set<User>() select new { id = user.Id, name = user.UserName } ); How could I modify this so that it allows me to check if a UserName exists? Here's the user class: public class User : IUser { public User(); public User(string userName); [Key] public string Id { get; set; } public virtual ICollection<UserLogin> Logins { get; set; } public virtual UserManagement Management { get; set; } public virtual ICollection<UserRole> Roles { get; set; } public string UserName { get; set; } }

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  • Why am I getting an IndexOutOfBoundsException here?

    - by Berzerker
    I'm getting an index out of bounds exception thrown and I don't know why, within my replaceValue method below. [null, (10,4), (52,3), (39,9), (78,7), (63,8), (42,2), (50,411)] replacement value test:411 size=7 [null, (10,4), (52,3), (39,9), (78,7), (63,8), (42,2), (50,101)] removal test of :(10,4) [null, (39,9), (52,3), (42,2), (78,7), (63,8), (50,101)] size=6 I try to replace the value again here and get an error... package heappriorityqueue; import java.util.*; public class HeapPriorityQueue<K,V> { protected ArrayList<Entry<K,V>> heap; protected Comparator<K> comp; int size = 0; protected static class MyEntry<K,V> implements Entry<K,V> { protected K key; protected V value; protected int loc; public MyEntry(K k, V v,int i) {key = k; value = v;loc =i;} public K getKey() {return key;} public V getValue() {return value;} public int getLoc(){return loc;} public String toString() {return "(" + key + "," + value + ")";} void setKey(K k1) {key = k1;} void setValue(V v1) {value = v1;} public void setLoc(int i) {loc = i;} } public HeapPriorityQueue() { heap = new ArrayList<Entry<K,V>>(); heap.add(0,null); comp = new DefaultComparator<K>(); } public HeapPriorityQueue(Comparator<K> c) { heap = new ArrayList<Entry<K,V>>(); heap.add(0,null); comp = c; } public int size() {return size;} public boolean isEmpty() {return size == 0; } public Entry<K,V> min() throws EmptyPriorityQueueException { if (isEmpty()) throw new EmptyPriorityQueueException("Priority Queue is Empty"); return heap.get(1); } public Entry<K,V> insert(K k, V v) { size++; Entry<K,V> entry = new MyEntry<K,V>(k,v,size); heap.add(size,entry); upHeap(size); return entry; } public Entry<K,V> removeMin() throws EmptyPriorityQueueException { if (isEmpty()) throw new EmptyPriorityQueueException("Priority Queue is Empty"); if (size == 1) return heap.remove(1); Entry<K,V> min = heap.get(1); heap.set(1, heap.remove(size)); size--; downHeap(1); return min; } public V replaceValue(Entry<K,V> e, V v) throws InvalidEntryException, EmptyPriorityQueueException { // replace the value field of entry e in the priority // queue with the given value v, and return the old value This is where I am getting the IndexOutOfBounds exception, on heap.get(i); if (isEmpty()){ throw new EmptyPriorityQueueException("Priority Queue is Empty."); } checkEntry(e); int i = e.getLoc(); Entry<K,V> entry=heap.get(((i))); V oldVal = entry.getValue(); K key=entry.getKey(); Entry<K,V> insert = new MyEntry<K,V>(key,v,i); heap.set(i, insert); return oldVal; } public K replaceKey(Entry<K,V> e, K k) throws InvalidEntryException, EmptyPriorityQueueException, InvalidKeyException { // replace the key field of entry e in the priority // queue with the given key k, and return the old key if (isEmpty()){ throw new EmptyPriorityQueueException("Priority Queue is Empty."); } checkKey(k); checkEntry(e); K oldKey=e.getKey(); int i = e.getLoc(); Entry<K,V> entry = new MyEntry<K,V>(k,e.getValue(),i); heap.set(i,entry); downHeap(i); upHeap(i); return oldKey; } public Entry<K,V> remove(Entry<K,V> e) throws InvalidEntryException, EmptyPriorityQueueException{ // remove entry e from priority queue and return it if (isEmpty()){ throw new EmptyPriorityQueueException("Priority Queue is Empty."); } MyEntry<K,V> entry = checkEntry(e); if (size==1){ return heap.remove(size--); } int i = e.getLoc(); heap.set(i, heap.remove(size--)); downHeap(i); return entry; } protected void upHeap(int i) { while (i > 1) { if (comp.compare(heap.get(i/2).getKey(), heap.get(i).getKey()) <= 0) break; swap(i/2,i); i = i/2; } } protected void downHeap(int i) { int smallerChild; while (size >= 2*i) { smallerChild = 2*i; if ( size >= 2*i + 1) if (comp.compare(heap.get(2*i + 1).getKey(), heap.get(2*i).getKey()) < 0) smallerChild = 2*i+1; if (comp.compare(heap.get(i).getKey(), heap.get(smallerChild).getKey()) <= 0) break; swap(i, smallerChild); i = smallerChild; } } protected void swap(int j, int i) { heap.get(j).setLoc(i); heap.get(i).setLoc(j); Entry<K,V> temp; temp = heap.get(j); heap.set(j, heap.get(i)); heap.set(i, temp); } public String toString() { return heap.toString(); } protected MyEntry<K,V> checkEntry(Entry<K,V> ent) throws InvalidEntryException { if(ent == null || !(ent instanceof MyEntry)) throw new InvalidEntryException("Invalid entry."); return (MyEntry)ent; } protected void checkKey(K key) throws InvalidKeyException{ try{comp.compare(key,key);} catch(Exception e){throw new InvalidKeyException("Invalid key.");} } }

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  • Binding an Ilist to datagridview containing another object in a field

    - by JaSk
    I have pretty much the same problem as this question http://stackoverflow.com/questions/970741 but in windows forms, can anyone help me solve it? this is my code, so you don't have to check the other question: public class Material { public virtual int id { get; private set; } public virtual string nombre { get; set; } public virtual string unidad { get; set; } public virtual Categorias Categoria { get; set; } public virtual IList Materiales { get; set; } public Material() { Materiales = new List<Materiales>(); } public virtual void AddMateriales(Materiales materiales) { materiales.Material = this; this.Materiales.Add(materiales); } } as you can see I have an object within the IList so when I use the List as the data source for a datagridview I get a object.categoria where I want to get the Categoria.Name property, can anyone help me?. Thanks

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  • How to best propagate changes upwards a hierarchical structure for binding?

    - by H.B.
    If i have a folder-like structure that uses the composite design pattern and i bind the root folder to a TreeView. It would be quite useful if i can display certain properties that are being accumulated from the folder's contents. The question is, how do i best inform the folder that changes occurred in a child-element so that the accumulative properties get updated? The context in which i need this is a small RSS-FeedReader i am trying to make. This are the most important objects and aspects of my model: Composite interface: public interface IFeedComposite : INotifyPropertyChanged { string Title { get; set; } int UnreadFeedItemsCount { get; } ObservableCollection<FeedItem> FeedItems { get; } } FeedComposite (aka Folder) public class FeedComposite : BindableObject, IFeedComposite { private string title = ""; public string Title { get { return title; } set { title = value; NotifyPropertyChanged("Title"); } } private ObservableCollection<IFeedComposite> children = new ObservableCollection<IFeedComposite>(); public ObservableCollection<IFeedComposite> Children { get { return children; } set { children.Clear(); foreach (IFeedComposite item in value) { children.Add(item); } NotifyPropertyChanged("Children"); } } public FeedComposite() { } public FeedComposite(string title) { Title = title; } public ObservableCollection<FeedItem> FeedItems { get { ObservableCollection<FeedItem> feedItems = new ObservableCollection<FeedItem>(); foreach (IFeedComposite child in Children) { foreach (FeedItem item in child.FeedItems) { feedItems.Add(item); } } return feedItems; } } public int UnreadFeedItemsCount { get { return (from i in FeedItems where i.IsUnread select i).Count(); } } Feed: public class Feed : BindableObject, IFeedComposite { private string url = ""; public string Url { get { return url; } set { url = value; NotifyPropertyChanged("Url"); } } ... private ObservableCollection<FeedItem> feedItems = new ObservableCollection<FeedItem>(); public ObservableCollection<FeedItem> FeedItems { get { return feedItems; } set { feedItems.Clear(); foreach (FeedItem item in value) { AddFeedItem(item); } NotifyPropertyChanged("Items"); } } public int UnreadFeedItemsCount { get { return (from i in FeedItems where i.IsUnread select i).Count(); } } public Feed() { } public Feed(string url) { Url = url; } Ok, so here's the thing, if i bind a TextBlock.Text to the UnreadFeedItemsCount there won't be simple notifications when an item is marked unread, so one of my approaches has been to handle the PropertyChanged event of every FeedItem and if the IsUnread-Property is changed i have my Feed make a notification that the property UnreadFeedItemsCount has been changed. With this approach i also need to handle all PropertyChanged events of all Feeds and FeedComposites in Children of FeedComposite, from the sound of it, it should be obvious that this is not such a very good idea, you need to be very careful that items never get added or removed to any collection without having attached the PropertyChanged event handler first and things like that. Also: What do i do with the CollectionChanged-Events which necessarily also cause a change in the sum of the unread items count? Sounds like more event handling fun. It is such a mess, it would be great if anyone has an elegant solution to this since i don't want the feed-reader to end up as awful as my first attempt years ago when i didn't even know about DataBinding...

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  • Class constructor in java

    - by aladine
    Please advise me the difference between two ways of declaration of java constructor public class A{ private static A instance = new A(); public static A getInstance() { return instance; } public static void main(String[] args) { A a= A.getInstance(); } } AND public class B{ public B(){}; public static void main(String[] args) { B b= new B(); } } Thanks

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