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• "detached entity passed to persist error" with JPA/EJB code

  - by zengr

  I am trying to run this basic JPA/EJB code: public static void main(String[] args){ UserBean user = new UserBean(); user.setId(1); user.setUserName("name1"); user.setPassword("passwd1"); em.persist(user); } I get this error: javax.ejb.EJBException: javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: com.JPA.Database Any ideas? I search on the internet and the reason I found was: This was caused by how you created the objects, i.e. If you set the ID property explicitly. Removing ID assignment fixed it. But I didn't get it, what will I have to modify to get the code working?

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• JPA 2.0 Implementations comparison : Hibernate 3.5 vs EclipseLink 2 vs OpenJPA 2

  - by peperg

  What's your choice? Do You have any suggestions and experience? I'm developing an application with Hibernate 3.5 and Spring 3.0 Pros: Good documentation Easy configuration and helpful logs Popularity - wide community Some extensions to JPA Some additional Tools - JBoss Tools for Eclipse, hbm2ddl, generating static metamodel etc... Cons: Bugs! (Sequences, collections etc...) Lots of reatures are doubled with "pure" Hibernate. There's a mess in legacy Hibernate and JPA annotations. I'm considering to switch to EclipseLink. What do You think ? Edit: I've tried EclipseLink and have very bad experiences. It seems like EclipseLink needs LoadTimeWeaver and likes to run on OSGi platform rather than simple Jetty or Tomcat environment. I just don't have time for all this configuration stuff.

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• Linking C and CXX files in CMake

  - by vedro so snegom

  Hi I'm building C++ app with CMake. But it uses some source files in C. Here is simplified structure: trunk/CMakeLists.txt: project(myapp) set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -g -Wall") add_subdirectory (src myapp) trunk/src/main.cpp: #include "smth/f.h" int main() { f(); } trunk/src/CMakeLists.txt: add_subdirectory (smth) link_directories (smth) set(APP_SRC main) add_executable (myapp ${APP_SRC}) target_link_libraries (myapp smth) trunk/src/smth/f.h: #ifndef F_H #define F_H void f(); #endif trunk/src/smth/f.c: #include "f.h" void f() {} trunk/src/smth/CMakeLists.txt set (SMTH_SRC some_cpp_file1 some_cpp_file2 f) add_library (smth STATIC ${SMTH_SRC}) The problem is: i run gmake, it compiles all the files and when it links all libs together, i get: undefined reference to `f()` in main.cpp if i rename f.c into f.cpp everything goes just fine. What's the difference and how to handle it? Thanks

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• .Net - using FileIOPermission with mask in file name

  - by Max Gontar

  Hello! I would like to apply FileIOPermission on set of files using mask in file name, ex. on all txt files in folder C:\TMP: [type: FileIOPermission(SecurityAction.PermitOnly, Read = @"C:\TMP\*.txt")] class SomeClass { static void testPermissions() { Console.WriteLine("allowed action"); File.OpenRead(@"C:\TMP\1.txt"); // <--- here goes exception Console.WriteLine("denied action"); try { File.Create(@"C:\TMP\2.txt"); } catch (Exception e) { Console.WriteLine(e.Message); } finally { Console.ReadKey(); } } } This throws ArgumentException "Illegal characters in path." What is wrong? Is it possible to achieve anyway?

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• Compiling the icu sqlite extension statically linked to icu.

  - by Georg

  I want to compile the icu sqlite extension statically linked to icu. This is what I've tried, maybe the mistake is obvious to you. cd icu/source ./runConfigureIcu Linux --enable-static --with-packaging-format=archive ... make cd ../../icu-sqlite gcc -o libSqliteIcu.so -shared icu.c -I../icu/source/common -I../icu/source/i18n -L ../icu/source/lib -lsicuuc -lsicui18n -lsicudata ... sqlite3 .load "libSqliteIcu.so" Undefined symbol utf8_countTrailBytes Files icu sqlite extension Download icu.c from sqlite.org ICU 4.2.1 Download ICU4C from icu-project.org My Requirements Runs on Linux & Windows Only one file that I have to distribute: libSqliteIcu.so. Any idea what else I can try? Documentation Sqlite ICU extension's readme ICU's readme

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• How to make an Android UI with images from a designer delivered as layers

  - by Not Me

  I hired a designer to help me redesign the UI for my Android app. For each Activity he gave me an image for the background, which includes any static content like fancy frames for text content; plus images for the buttons, which must fit in to the background image in exact places, to fit into the frames in the background image. However, since Android devices have different screen sizes and aspect ratios, it's easy to fit the background image by itself with android:scaleType="centerInside", but how can I get all the other images to fit in with background exactly, to the pixel? If they didn't have to fit in with the background, I would just set the exact width and height for each ImageButton, but depending on how the background scales (based on the screen size and ratio) they might end up not aligned correctly. Thank you very much in advance.

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• How to add handler in dynamic datatemplate

  - by Phillip Ngan

  I am successfully declaring a data template in a code behind as follows: private static DataTemplate CreateTemplate(string sortMemberPath, HorizontalAlignment horzAlignment) { const string xamlFormat = "<DataTemplate xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" >" + "<StackPanel > " + " <TextBlock Margin=\"2,0\" VerticalAlignment=\"Center\" HorizontalAlignment=\"_HALIGNMENT_\" " + " Text=\"hello there\"> " + " </TextBlock> " + "</StackPanel>" + "</DataTemplate>"; return (DataTemplate) XamlReader.Load(xamlReturned); } But now I want to add a size changed handler by changing the line: + "<StackPanel > " to + "<StackPanel SizeChanged="SizeChangedHandler" > " I have the method "SizeChangedHandler" declared in the code behind. This results in a xaml parse error when the control attempts to load at runtime. I suspect that it can't find the handler "SizeChangedHandler". How can I specify this handler so that the xaml parser is happy.

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• Asp.Net(C#) Jquery Ajax with WebMethod In Public Method Call

  - by oraclee

  Hi All; Aspx Page: $(document).ready(function() { $("#btnn").click(function() { $.ajax({ type: "POST", url: "TestPage.aspx/emp", data: "{}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(msg) { } }); }); }); CodeBehind: public void grdload() { GridView1.DataSource = GetEmployee("Select * from Employee"); GridView1.DataBind(); } [WebMethod] public static void emp() { TestPage re = new TestPage(); re.grdload(); } I Can't Gridview Data Load ? How To Make GridView Data Load? Thank You

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• How to avoid "source !=null" when using Code Contracts and Linq To Sql?

  - by Florian

  I have the following code using a normal data context which works great: var dc = new myDataContext(); Contract.Assume(dc.Cars!= null); var cars = (from c in dc.Cars where c.Owner = 'Jim' select c).ToList(); However when I convert the filter to an extension method like this: var dc = new myDataContext(); Contract.Assume(dc.Cars!= null); var cars = dc.Cars.WithOwner('Jim'); public static IQueryable<Car> WithOwner(IQueryable<Car> cars, string owner) { Contract.Requires(cars != null); return cars.Where(c => c.Owner = owner); } I get the following warning: warning : CodeContracts: requires unproven: source != null

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• Clob as param for PL/SQL Java Stored Procedure

  - by JDS

  I have a java stored procedure that takes in a clob representing a chunk of javascript and mins it. The structure of the function calling the JSP is as follows: function MIN_JS(pcl_js in clob) return clob as language java name 'JSMin.min(oracle.sql.CLOB) return oracle.sql.CLOB'; In the actual JSP, I have the following: import oracle.sql.CLOB; public class JSMin { ... public static min(CLOB js) { ... } The problem I'm having is that whenever I pass a clob to JS_MIN, it is always interpreted as null inside the JSP. I've checked the clob before calling JS_MIN annd it definitely has contents. Any ideas as to what I'm missing? Any help is greatly appreciated.

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• Embedding Facebook Connect In A Facebook Page

  - by Russell C.

  Our site allows users to register using Facebook Connect. We also have a Facebook page. We'd like to include the "Connect with Facebook" button in our page so a user could instantly connect (aka register) and then be forwarded on to their account on our site. I was hoping to use the Static FBML page application and the FBML iFrame tag to simply embed the button but it looks like the iFrame tag isn't allowed in Facebook pages. Facebook Connect uses JavaScript so I'm wondering if there is some kind of trick I could use like popping up a page in a new window that would automatically display the connect dialog box. Any ideas on how I would include a Facebook Connect button on our Facebook page would awesome! Thanks in advance for your help.

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• Can NSDictionary be used with TableView on iPhone?

  - by bobo

  In a UITableViewController subclass, there are some methods that need to be implemented in order to load the data and handle the row selection event: - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; //there is only one section needed for my table view } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return [myList count]; //myList is a NSDictionary already populated in viewDidLoad method } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease ]; } // indexPath.row returns an integer index, // but myList uses keys that are not integer, // I don't know how I can retrieve the value and assign it to the cell.textLabel.text return cell; } - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // Handle row on select event, // but indexPath.row only returns the index, // not a key of the myList NSDictionary, // this prevents me from knowing which row is selected } How is NSDictionary supposed to work with TableView? What is the simplest way to get this done?

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• Throwing exceptions as well as catching exceptions?

  - by Eric S

  I was wondering how Java takes the following scenario public static void main(String[] args) throws IndexOutOfBoundsException, CoordinateException, MissionException, SQLException, ParserConfigurationException { try { doSomething(); } catch (Exception e) { e.printStackTrace(); } } In the above code, I am declaring the main function to throw many different exceptions, but inside the function, I am catching the generic Exception. I am wondering how java takes this internally? I.e., say doSomething() throws an IndexOutOfBounds exception, will the e.printStackTrace() get called in the last catch (Exception e) {...} block? I know if an exception not declared in the throws area of the function gets thrown, the try/catch will handle it, but what about exceptions mentioned in the declaration?

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• How would you pass objects with MVC and jQuery AJAX?

  - by Ken

  I am finally experimenting and trying to learn MVC after years of asp.net. I am used to using asp.net AJAX PageMethods where you can pass an object that automagically gets parsed to whatever type the parameter is in that method. Javascript: PageMethods.AddPerson({First:"John",Last:"Doe"}); Code-Behind: [WebMethod] public static Result AddPerson(Person objPerson) { return Person.Save(); } How would do this using MVC and jQuery? Did just have to send strings and parse the json to object?

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• Windows hosts file and IIS binding question

  - by bmw0128

  I'm building a few SharePoint sites, and I want to make use of zones so I may set security different in the various zones. My workstation has a local SharePoint, and I use it for development. My workstation has a static IP, and is connected to the internet. When I make a SharePoint site, I want to add a host header, for instance, devbox.com. I do not own this name, nor do I want to. I then add an entry in my hosts file, but when I surf to http://devbox.com:8080, it does not resolve. Do I need to register the name I want to use, or should this work, i.e., have my hosts file resolve names/IPs first?

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• How to register a service with Mono.ZeroConf?

  - by pablo

  Hi, I'm trying to test the ZeroConf sample at http://www.mono-project.com/Mono.Zeroconf. I'm running OpenSuse 11 and Mono 2.2. My server code is: using System; using Mono.Zeroconf; namespace zeroconftestserver { class MainClass { public static void Main(string[] args) { RegisterService service = new RegisterService (); service.Name = "test server"; service.RegType = "_daap._tcp"; service.ReplyDomain = "local."; service.Port = 6060; // TxtRecords are optional TxtRecord txt_record = new TxtRecord (); txt_record.Add ("Password", "false"); service.TxtRecord = txt_record; service.Register(); Console.WriteLine("Service registered!"); Console.ReadLine(); } } } But I can't find my registered service with the sample client browser code nor with mzclient. Thanks!

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• jQuery: how to produce a ProgressBar from given markup

  - by Richard Knop

  So I'm using the ProgressBar JQuery plugin (http://t.wits.sg/misc/jQueryProgressBar/demo.php) to create some static progress bars. What I want to achieve is to from this markup: <span class="progress-bar">10 / 100</span> produce a progress bar with maximum value of 100 and current value of 10. I am using html() method to get the contents of the span and then split() to get the two numbers: $(document).ready(function() { $(".progress-bar").progressBar($(this).html().split(' / ')[0], { max: $(this).html().split(' / ')[1], textFormat: 'fraction' }); }); That doesn't work, any suggestions? I'm pretty sure the problem is with $(this).html().split(' / ')[0] and $(this).html().split(' / ')[1], is that a correct syntax?

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• Inclusion Handling in MVC 2 / MVCContrib

  - by mnemosyn

  I'd like to improve my page by combining and minifying javascript and CSS files. Since MVCContrib already contains a project called IncludeHandling, I took a look at that which unfortunately left me with unanswered questions: There is quite a set of interfaces and objects involved in the process. Now I'm using Ninject.Mvc, but it seems that MvcContrib.IncludeHandling is using some additional (home-brewed?) DI? Can I work around this? Has anybody used this and can share some experiences? Secondly, advice that is often heard is to put static content on different domains so the request does not contain cookies and the like, making it much easier for the server to handle the request. But how can I combine this with automatic inclusion handling - isn't that necessarily served in the same application? EDIT: Figured that there is really just a single resolve call in the whole thing, i really wonder why they use DI for that... Thinking about a fork there...

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• What language has the longest "Hello world" program?

  - by Kip

  In most scripting languages, a "Hello world!" application is very short: print "Hello world" In C++, it is a little more complicated, requiring at least 46 non-whitespace characters: #include <cstdio> int main() { puts("Hello world"); } Java, at 75 non-whitespace characters, is even more verbose: class A { public static void main(String[] args) { System.out.print("Hello world"); } } Are there any languages that require even more non-whitespace characters than Java? Which language requires the most? Notes: I'm asking about the length of the shortest possible "hello world" application in a given language. A newline after "Hello world" is not required. I'm not counting whitespace, but I know there is some language that uses only whitespace characters. If you use that one you can count the whitespace characters.

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• Groovy Prototype Object

  - by Holden

  I have a method with an incoming variable, which represents a script. e.g. hello.groovy Foo.init(this) Foo.groovy class Foo { static init(app) { } } What is the best way to add a ton of new functionality to the app variable in the init method? Basically, I would like to add all the functionality of another object to the app object. For instance, if I had another class: class Bar { def a() { } def b() { } } I would like the app object to basically be a new Bar(). In JavaScript, this is easy by using the prototype object, but I cannot seem to get it working in groovy. What is the best way to accomplish this? Or should I be doing something differently?

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• How do I reduce the height of a TableView when it is constructed in IB?

  - by erotsppa

  I wanted to add a view to the bottom of my screen. The controller is a UITableViewController, how do I shrink the tableView and add a extra view at the bottom of the tableview? I've tried setting the frame of self.tableView in different places (viewDidLoad, viewWillAppear etc) but nothing happens. The tableView is created by IB and not programtically. I've tried added a footer to my table view but that's not what I want, because the footer actually scrolls up, I want a static non moving View at the bottom of the screen.

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• Avoiding the Controller with Routing Rules in ASP.NET MVC

  - by Ryan Elkins

  I've created a website with ASP.NET MVC. I have a number of static pages that I am currently serving through a single controller called Home. This creates some rather ugly URLs. example.com/Home/About example.com/Home/ContactUs example.com/Home/Features You get the idea. I'd rather not have to create a controller for each one of these as the actions simply call the View with no model being passed in. Is there a way to write a routing rule that will remove the controller from the URL? I'd like it to look like: example.com/About example.com/ContactUs example.com/Features If not, how is this situation normally handled? I imagine I'm not the first person to run in to this.

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• How to create DSN for SQL Server using C# ?

  - by Pavan Kumar

  using Microsoft.Win32; using System.Runtime.InteropServices; [DllImport("ODBCCP32.dll")] private static extern bool SQLConfigDataSource(IntPtr parent, int request, string driver, string attributes); private void btnDsn_Click(object sender, EventArgs e) { string str = "SERVER=MYDBSERVER\0DSN=MYDSN\0DESCRIPTION=MYDSNDESC\0DATABASE=master\0TRUSTED_CONNECTION=YES"; SQLConfigDataSource((IntPtr)0, 4, "SQL Server ",str); } Reference : http://social.msdn.microsoft.com/Forums/en-US/vscrystalreports/thread/441811b9-c4e9-4d15-97a3-7b92d2c9f318 Can anybody help me remove the following errors?? Error 1 Expected class, delegate, enum, interface, or struct C:\Documents and Settings\Pavan\My Documents\Visual Studio 2008\Projects\CopyDatabase\CopyDatabase\Synchronize.cs 17 23 CopyDatabase Error 2 The name 'SQLConfigDataSource' does not exist in the current context C:\Documents and Settings\Pavan\My Documents\Visual Studio 2008\Projects\CopyDatabase\CopyDatabase\Synchronize.cs 67 13 CopyDatabase

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• Usage of sendBroadcast()

  - by Vidhya

  sendBroadcast() - Should it be called inside Activity? I am trying to call sendBroadcast() from my method of utility-class which doesn't extend Activity. I am getting compilation error as below The method sendBroadcast(Intent) is undefined for the type MyWrapperClass MyWrapperClass.java Here is the code snippet: abstract class MyWrapperClass { public static void sendData() { Intent intent = new Intent ("com.proj.utility.mgr",null); intent.putExtra("example","Broadcasting "); sendBroadcast(intent); } } Is there any concept behind using sendBroadcast call inside my class. There is no issue in using sendBroadcast() inside Activity. Can someone here help me to resolve it? Or Any other suggestions are invited to return data from utility class to application asynchronously. Thanks in advance.

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• Scope of variables inside anonymous functions in C#

  - by Vinod

  I have a doubt in scope of varibles inside anonymous functions in C#. Consider the program below: delegate void OtherDel(int x); public static void Main() { OtherDel del2; { int y = 4; del2 = delegate { Console.WriteLine("{0}", y);//Is y out of scope }; } del2(); } My VS2008 IDE gives the following errors: [Practice is a class inside namespace Practice] 1.error CS1643: Not all code paths return a value in anonymous method of type 'Practice.Practice.OtherDel' 2.error CS1593: Delegate 'OtherDel' does not take '0' arguments. It is told in a book: Illustrated C# 2008(Page 373) that the int variable y is inside the scope of del2 definition. Then why these errors.

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