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  • How to use DAOs with hibernate/jpa?

    - by Ari
    Assuming the DAO structure and component interaction described below, how should DAOs be used with persistence layers like hibernate and toplink? What methods should/shouldn't they contain? Would it be bad practice to move the code from the DAO directly to the service? For example, let's say that for every model we have a DAO (that may or may not implement a base interface) that looks something like the following: public class BasicDao<T> { public List<T> list() { ... } public <T> retrieve() { ... } public void save() { ... } public void delete() { ... } } Component interaction pattern is -- service DAO model

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  • Curve fitting: Find the smoothest function that satisfies a list of constraints.

    - by dreeves
    Consider the set of non-decreasing surjective (onto) functions from (-inf,inf) to [0,1]. (Typical CDFs satisfy this property.) In other words, for any real number x, 0 <= f(x) <= 1. The logistic function is perhaps the most well-known example. We are now given some constraints in the form of a list of x-values and for each x-value, a pair of y-values that the function must lie between. We can represent that as a list of {x,ymin,ymax} triples such as constraints = {{0, 0, 0}, {1, 0.00311936, 0.00416369}, {2, 0.0847077, 0.109064}, {3, 0.272142, 0.354692}, {4, 0.53198, 0.646113}, {5, 0.623413, 0.743102}, {6, 0.744714, 0.905966}} Graphically that looks like this: We now seek a curve that respects those constraints. For example: Let's first try a simple interpolation through the midpoints of the constraints: mids = ({#1, Mean[{#2,#3}]}&) @@@ constraints f = Interpolation[mids, InterpolationOrder->0] Plotted, f looks like this: That function is not surjective. Also, we'd like it to be smoother. We can increase the interpolation order but now it violates the constraint that its range is [0,1]: The goal, then, is to find the smoothest function that satisfies the constraints: Non-decreasing. Tends to 0 as x approaches negative infinity and tends to 1 as x approaches infinity. Passes through a given list of y-error-bars. The first example I plotted above seems to be a good candidate but I did that with Mathematica's FindFit function assuming a lognormal CDF. That works well in this specific example but in general there need not be a lognormal CDF that satisfies the constraints.

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  • Efficiency of data structures in C99 (possibly affected by endianness)

    - by Ninefingers
    Hi All, I have a couple of questions that are all inter-related. Basically, in the algorithm I am implementing a word w is defined as four bytes, so it can be contained whole in a uint32_t. However, during the operation of the algorithm I often need to access the various parts of the word. Now, I can do this in two ways: uint32_t w = 0x11223344; uint8_t a = (w & 0xff000000) >> 24; uint8_t b = (w & 0x00ff0000) >> 16; uint8_t b = (w & 0x0000ff00) >> 8; uint8_t d = (w & 0x000000ff); However, part of me thinks that isn't particularly efficient. I thought a better way would be to use union representation like so: typedef union { struct { uint8_t d; uint8_t c; uint8_t b; uint8_t a; }; uint32_t n; } word32; Using this method I can assign word32 w = 0x11223344; then I can access the various parts as I require (w.a=11 in little endian). However, at this stage I come up against endianness issues, namely, in big endian systems my struct is defined incorrectly so I need to re-order the word prior to it being passed in. This I can do without too much difficulty. My question is, then, is the first part (various bitwise ands and shifts) efficient compared to the implementation using a union? Is there any difference between the two generally? Which way should I go on a modern, x86_64 processor? Is endianness just a red herring here? I could inspect the assembly output of course, but my knowledge of compilers is not brilliant. I would have thought a union would be more efficient as it would essentially convert to memory offsets, like so: mov eax, [r9+8] Would a compiler realise that is what happening in the bit-shift case above? If it matters, I'm using C99, specifically my compiler is clang (llvm). Thanks in advance.

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  • jqGrid search/filter data api

    - by McLovin
    I've already read all available documentation and I cannot find a solution. I have a calendar outside of the grid which on click returns a date. All I need to do is filter my jqGrid based on that date. Can someone point me to the correct API method? Thanks!

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  • how to set data into textfeild

    - by shishir.bobby
    hi all i have a table view containing some text. and an selecting a row, i hv to set text on another view's textfeild based on the selected index of row od table view. this is hoe it looks like -(void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath { abc *abcController = [ [ abcController alloc] initWithNibName:@"abcController" bundle:[NSBundle mainBundle]]; [self.navigationController abcController animated:YES]; coffeeObj = [appdelegate.coffeeArray objectAtIndex:indexPath.row]; abcController.sender.text =[NSString stringWithFormat:@" to %@", coffeeObj.to]; abcController.mobileNumber.text = [NSString stringWithFormat:@" from %@", coffeeObj.from]; [abcController release]; } and this is how my textfeilds looks like, which is in table view if(indexPath.row == 0) textField.keyboardType = UIKeyboardTypeDefault; else textField.keyboardType = UIKeyboardTypePhonePad; textField.autocorrectionType = UITextAutocorrectionTypeNo; [cell.contentView addSubview:textField]; if(indexPath.row == 0) { self.sender = textField; cell.textLabel.text = NSLocalizedString(@"From :", @" "); NSLog(@"sender: %@", self.sender.text); } else { self.mobileNumber = textField; cell.textLabel.text = NSLocalizedString(@"To :" ,@" "); NSLog(@"mobile Number: %@", self.mobileNumber.text); } [textField release]; my problem is i am not abel to set text in these textfeilds from previous view..... plz let me knw where i am wrong..... w8ing for a quick reply.. regards shishir

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  • Ruby zlib deflate massive data

    - by Bub Bradlee
    I'm trying to use Zlib::Deflate.deflate on a massive file (4 gigs). There are obvious problems with doing that, the first of which being that I can't load the entire file into memory all at once. Zlib::GzipWriter would work, since it works with streams, but it's not zlib compression. Any ideas?

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  • Magento resource model for table with compound primary key

    - by sdek
    I am creating a custom module for a Magento ecommerce site, and the module will center around a new (ie, custom) table that has a compound/composite primary key, or rather the table has two columns that make up the primary key. Does anybody know how to create your models/resource models based on a table with a compound key? To give a few more details, I have looked up several tutorials and also used the excellent moduleCreator script. But it seems like all the tutorials revolve around the table having a PK with just one column in it. Something like this: class <Namespace>_<Module>_Model_Mysql4_<Module> extends Mage_Core_Model_Mysql4_Abstract { public function _construct(){ $this->_init('<module_alias>/<table_alias>', '<table_primary_key_id>'); } } Also, I just noticed that looking at the database model almost all tables have a single primary key. I understand this has much to do with the EAV-style db structure, but still is it possible to use a table with a compound PK? I want to stick with the Magento framework/conventions if possible. Is it discouraged? Should I just change the structure of my custom table to have some dummy id column? I do have the ability to do that, but geez! (Another side note that I thought I would mention is that it looks like the Zend Framework provides a way to base a class on a table with compound primary key (see Example #20 on this page - about half-way down), so it seems that the Magento framework should also provide for it... I just don't see how.)

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  • Programmatical Creation of NSMappingModel

    - by enchilada
    I want to programmatically (without Lightweight Migration) create a mapping model between two models that are exactly the same, except one of the entities (there are a bunch of entities) has different attributes. Let's call this entity "Person". And let's say the destination model has 1) added a new attribute called "address" 2) deleted an attribute called "eyeColor" 3) kept (i.e. not done anything with) an attribute called "name" How would you create an NSMappingModel between these models programmatically? I happen to have some explicit questions that might help me do this by myself: Q1) Do I have to create NSEntityMapping objects for all of the entities other than "Person", even if they remain unchanged? Q2) How do I deal with the "address" attribute in "Person", which is a new one being created? Should I create an NSPropertyMapping for that somehow, that turns nothing into something ("address")? Q3) How do I deal with the "name" attribute in "Person"? Do I have to create an NSPropertyMapping for that, even though it simply stays the same? Q4) For the NSEntityMapping corresponding to "Person", is not creating any NSPropertyMapping for "eyeColor" a proper way to get it deleted? Or should I create an NSPropertyMapping for "eyeColor"? If yes, how would this object be created, i.e. what would determine that its purpose is to get rid of "eyeColor"? Thank you in advance, and I apologize not being able to answer these questions myself, as the documenation really has no good example of how to create NSMappingModels programmatically. Note again that I'm not allowed to use Lightweight Migration. I must do this manually.

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  • Pulling data and printing it in an HTML table

    - by John
    Hello, From a MySQL table called "submission" containing the fields "loginid, submissionid, title, url, datesubmitted, displayurl", I would like to print an HTML table thats contains all "title" and corresponding "datesubmitted" where "loginid" equals "$profile." The code I am trying to use is below. It isn't working. Any ideas why it isn't working? Thanks in advance, John $profile = $_GET['profile']; $sqlStr = "SELECT loginid, submissionid, title, url, datesubmitted, displayurl FROM submission WHERE loginid = $profile ORDER BY datesubmitted DESC"; $result = mysql_query($sqlStr); $arr = array(); echo "<table class=\"samplesrec\">"; while ($row = mysql_fetch_array($result)) { echo '<tr>'; echo '<td class="sitename1"><a href="http://www.'.$row["url"].'">'.$row["title"].'</a></td>'; echo '</tr>'; echo '<tr>'; echo '<td class="sitename2">'.$row["datesubmitted"].'</a></td>'; echo '</tr>'; } echo "</table>";

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  • Should I have different models and views for no user data than for some user data?

    - by Sam Holder
    I'm just starting to learn asp.net mvc and I'm not sure what the right thing to do is. I have a user and a user has a collection of (0 or more) reminders. I have a controller for the user which gets the reminders for the currently logged in user from a reminder service. It populates a model which holds some information about the user and the collection of reminders. My question is should I have 2 different views, one for when there are no reminders and one for when there are some reminders? Or should I have 1 view which checks the number of reminders and displays different things? Having one view seems wrong as then I end up with code in my view which says if (Model.Reminders.Count==0){//do something} else {do something else}, and having logic in the view feels wrong. But if I want to have 2 different views then I'd like to have some code like this in my controller: [Authorize] public ActionResult Index() { MembershipUser currentUser = m_membershipService.GetUser(); IList<Reminder> reminders = m_reminderRepository.GetReminders(currentUser); if (reminders.Count == 0) { var model = new EmptyReminderModel { Email = currentUser.Email, UserName = currentUser.UserName }; return View(model); } else { var model = new ReminderModel { Email = currentUser.Email, UserName = currentUser.UserName, Reminders = reminders }; return View(model); } but obviously this doesn't compile as the View can't take both different types. So if I'm going to do this should I return a specific named view from my controller, depending on the emptiness of the reminders, or should my Index() method redirect to other actions like so: [Authorize] public ActionResult Index() { MembershipUser currentUser = m_membershipService.GetUser(); IList<Reminder> reminders = m_reminderRepository.GetReminders(currentUser); if (reminders.Count == 0) { return RedirectToAction("ShowEmptyReminders"); } else { return RedirectToAction("ShowReminders"); } } which seems nicer but then I need to re-query the reminders for the current user in the ShowReminders action. Or should I be doing something else entirely?

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  • WPF Listview- What would be the best way to display data from different ObservableCollections based

    - by highone
    I have three ObservableCollections: CharacterCollection, LocationCollection, and ItemCollection. They are all collections of objects; CharacterCollection is a collection of Character Objects. I need to display, in the listview, information from the collection determined by the user clicking on a button. I would prefer to use databinding, but I don't see a clear cut way to do that with multiple collections containing different types of objects. What would be the best way to easily switch between collections?

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  • C# datatable to listview

    - by Data-Base
    I like to be able to view datatable in windows form I managed to get the headers only with ListView how to get the data in there DataTable data = new DataTable(); data = EnumServices(); //create headers foreach (DataColumn column in data.Columns) { listView_Services.Columns.Add(column.ColumnName); } I just want to show now the data in there! cheers

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  • Pipe data from InputStream to OutputStream in Java

    - by Wangnick
    Dear all, I'd like to send a file contained in a ZIP archive unzipped to an external program for further decoding and to read the result back into Java. ZipInputStream zis = new ZipInputStream(new FileInputStream(ZIPPATH)); Process decoder = new ProcessBuilder(DECODER).start(); ??? BufferedReader br = new BufferedReader(new InputStreamReader( decoder.getInputStream(),"us-ascii")); for (String line = br.readLine(); line!=null; line = br.readLine()) { ... } What do I need to put into ??? to pipe the zis content to the decoder.getOutputStream()? I guess a dedicated thread is needed, as the decoder process might block when its output is not consumed.

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  • jQuery / jqGrids / Submitting form data troubles...

    - by Kelso
    Ive been messing with jqgrids alot of the last couple days, and I have nearly everything the way I want it from the display, tabs with different grids, etc. Im wanting to make use of Modal for adding and editing elements on my grid. My problem that Im running into is this. I have my editurl:"editsu.php" set, if that file is renamed, on edit, i get a 404 in the modal.. great! However, with that file in place, nothing at all seems to happen. I even put a die("testing"); line at the top, so it sees the file, it just doesnt do anything with it. Below is the content. ........ the index page jQuery("#landings").jqGrid({ url:'server.php?tid=1', datatype: "json", colNames:['ID','Tower','Sector', 'Client', 'VLAN','IP','DLink','ULink','Service','Lines','Freq','Radio','Serial','Mac'], colModel:[ {name:'id', index:'id', width : 50, align: 'center', sortable:true,editable:true,editoptions:{size:10}}, {name:'tower', index:'tower', width : 85, align: 'center', sortable:true,editable:false,editoptions:{readonly:true,size:30}}, {name:'sector', index:'sector', width : 50, align: 'center',sortable:true,editable:true,editoptions:{readonly:true,size:20}}, {name:'customer',index:'customer', width : 175, align: 'left', editable:true,editoptions:{readonly:true,size:35}}, {name:'vlan', index:'vlan', width : 35, align: 'left',editable:true,editoptions:{size:10}}, {name:'suip', index:'suip', width : 65, align: 'left',editable:true,editoptions:{size:20}}, {name:'datadl',index:'datadl', width:55, editable: true,edittype:"select",editoptions:{value:"<? $qr = qquery("select * from datatypes"); while ($q = ffetch($qr)) {echo "$q[id]:$q[name];";}?>"}}, {name:'dataul', index:'dataul', width : 55, editable: true,edittype:"select",editoptions:{value:"<? $qr = qquery("select * from datatypes"); while ($q = ffetch($qr)) {echo "$q[id]:$q[name];";}?>"}}, {name:'servicetype', index:'servicetype', width : 85, editable: true,edittype:"select",editoptions:{value:"<? $qr = qquery("select * from servicetype"); while ($q = ffetch($qr)) {echo "$q[id]:$q[name];";}?>"}}, {name:'voicelines', index:'voicelines', width : 35, align: 'center',editable:true,editoptions:{size:30}}, {name:'freqname', index:'freqname', width : 35, editable: true,edittype:"select",editoptions:{value:"<? $qr = qquery("select * from freqband"); while ($q = ffetch($qr)) {echo "$q[id]:$q[name];";}?>"}}, {name:'radioname', index:'radioname', width : 120, editable: true,edittype:"select",editoptions:{value:"<? $qr = qquery("select * from radiotype"); while ($q = ffetch($qr)) {echo "$q[id]:$q[name];";}?>"}}, {name:'serial', index:'serial', width : 100, align: 'right',editable:true,editoptions:{size:20}}, {name:'mac', index:'mac', width : 120, align: 'right',editable:true,editoptions:{size:20}} ], rowNum:20, rowList:[30,50,70], pager: '#pagerl', sortname: 'sid', mtype: "GET", viewrecords: true, sortorder: "asc", altRows: true, caption:"Landings", editurl:"editsu.php", height:420 }); jQuery("#landings").jqGrid('navGrid','#pagerl',{edit:true,add:true,del:false,search:false},{height:400,reloadAfterSubmit:false},{height:400,reloadAfterSubmit:false},{reloadAfterSubmit:false},{}); now for the editsu.php file.. $operation = $_REQUEST['oper']; if ($operation == "edit") { qquery("UPDATE customers SET vlan = '".$_POST['vlan']."', datadl = '".$_POST['datadl']."', dataul = '".$_POST['dataul']."', servicetype = '".$_POST['servicetype']."', voicelines = '".$_POST['voicelines']."', freqname = '".$_POST['freqname']."', radioname = '".$_POST['radioname']."', serial = '".$_POST['serial']."', mac = '".$_POST['mac']."' WHERE id = '".$_POST['id']."'") or die(mysql_error()); } Im just having a hard time troubleshooting this to figure out where its getting hung up at. My next question after this would be to see if its possible to make it so when you click "add", that it auto inserts a row into the db with a couple variable predtermined and then bring up the modal window, but ill work on the first problem first. thanks!

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  • Extract enumeration data from .XSD file

    - by Ram
    Hi, I am trying to read enum from a XSD file. The schema is as follows <xs:schema id="ShipReports-v1.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" attributeFormDefault="unqualified" elementFormDefault="qualified" msdata:IsDataSet="true"> <xs:simpleType name="Type"> <xs:restriction base="xs:string"> <xs:enumeration value="Op1" /> <xs:enumeration value="Op2" /> <xs:enumeration value="Op3" /> </xs:restriction> </xs:simpleType> </xs:schema> I also tried using this but I am getting list item count as Zero. Following is the code I am using DataSet _sR = new DataSet(); _sR.ReadXmlSchema(assembly.GetManifestResourceStream("v1.xsd")); XmlDocument xDoc = new XmlDocument(); xDoc.LoadXml(_sR.GetXml()); XmlNamespaceManager xMan = new XmlNamespaceManager(xDoc.NameTable); xMan.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema"); XmlNodeList xNodeList = xDoc.SelectNodes( "//xs:schema/xs:simpleType[@name='Type']/xs:enumeration", xMan); string[] enumVal = new string[xNodeList.Count]; int ctr = 0; foreach (XmlNode xNode in xNodeList) { enumVal[ctr] = xNode.Attributes["value"].Value; ctr++; }

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  • Large public datasets?

    - by Jason
    I am looking for some large public datasets, in particular: Large sample web server logs that have been anonymized. Datasets used for database performance benchmarking. Any other links to large public datasets would be appreciated. I already know about Amazon's public datasets at: http://aws.amazon.com/publicdatasets/

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  • sql-server: how to select from dupilcate rows from table?

    - by RedsDevils
    Hi All, I have the following table. CREATE TABLE TEST(ID TINYINT NULL, COL1 CHAR(1)) INSERT INTO TEST(ID,COL1) VALUES (1,'A') INSERT INTO TEST(ID,COL1) VALUES (2,'B') INSERT INTO TEST(ID,COL1) VALUES (1,'A') INSERT INTO TEST(ID,COL1) VALUES (1,'B') INSERT INTO TEST(ID,COL1) VALUES (1,'B') INSERT INTO TEST(ID,COL1) VALUES (2,'B') I would like to select duplicate rows from that table. How Can I select? I try like the following: SELECT TEST.ID,TEST.COL1 FROM TEST WHERE TEST.ID IN (SELECT ID FROM TEST WHERE TEST.COL1 IN (SELECT COL1 FROM TEST WHERE TEST.ID IN (SELECT ID FROM TEST GROUP BY ID HAVING COUNT(*) > 1) GROUP BY COL1 HAVING COUNT(*) > 1) GROUP BY ID HAVING COUNT(*) > 1) Where's the Error? Can you modify that? Help me! Thanks in advance!

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  • javascript return function's data as a file

    - by Dennis
    I have a function in javascript called "dumpData" which I call from a button on an html page as **onlick="dumpData(dbControl);"* What it does is return an xml file of the settings (to an alert box right now). I want to return it to the user as a file download. Is there a way to create a button when click will open a file download box and ask the user to save or open it? (sorta of like right-clicking and save target as)... Or can it be sent to a php file and use export();? Not sure how I would send a long string like that to php and have it simple send it back as a file download. Dennis

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  • Recover data from hard disk

    - by Hitesh Solanki
    Hi I have formatted my c: drive and window xp is installed successfully,but I cannot able to access d: drive. when I am trying to double click on the d: drive,following message is displayed: "the disk in drive D: is not formatted, do you want to format it now ? " When I am trying to access from command prompt,the following message is displayed: "The volume does not contain a recognized file system. Please make sure that all required file system drivers are loaded and that the volume is not corrupted." So please help me.... Thanks in advance....

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