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• OpenCV to JNI how to make it work?

  - by user293252

  I am tring to use opencv and java for face detection, and in that pursit i found this "JNI2OPENCV" file....but i am confused on how to make it work, can anyone help me? http://img519.imageshack.us/img519/4803/askaj.jpg and the following is the FaceDetection.java class JNIOpenCV { static { System.loadLibrary("JNI2OpenCV"); } public native int[] detectFace(int minFaceWidth, int minFaceHeight, String cascade, String filename); } public class FaceDetection { private JNIOpenCV myJNIOpenCV; private FaceDetection myFaceDetection; public FaceDetection() { myJNIOpenCV = new JNIOpenCV(); String filename = "lena.jpg"; String cascade = "haarcascade_frontalface_alt.xml"; int[] detectedFaces = myJNIOpenCV.detectFace(40, 40, cascade, filename); int numFaces = detectedFaces.length / 4; System.out.println("numFaces = " + numFaces); for (int i = 0; i < numFaces; i++) { System.out.println("Face " + i + ": " + detectedFaces[4 * i + 0] + " " + detectedFaces[4 * i + 1] + " " + detectedFaces[4 * i + 2] + " " + detectedFaces[4 * i + 3]); } } public static void main(String args[]) { FaceDetection myFaceDetection = new FaceDetection(); } } CAn anyone tell me how can i make this work on Netbeans?? I tried Google but help on this particular topic is very meger. I have added the whole folder as Llibrary in netbeans project and whe i try to run the file i get the followig wrroes. Exception in thread "main" java.lang.UnsatisfiedLinkError: FaceDetection.JNIOpenCV.detectFace(IILjava/lang/String;Ljava/lang/String;)[I at FaceDetection.JNIOpenCV.detectFace(Native Method) at FaceDetection.FaceDetection.<init>(FaceDetection.java:19) at FaceDetection.FaceDetection.main(FaceDetection.java:29) Java Result: 1 BUILD SUCCESSFUL (total time: 2 seconds) CAn anyone tell me the exact way to work with this? like what all i have to do?

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• C# Thread-safe Extension Method

  - by Wonko the Sane

  Hello All, I may be waaaay off, or else really close. Either way, I'm currently SOL. :) I want to be able to use an extension method to set properties on a class, but that class may (or may not) be updated on a non-UI thread, and derives from a class the enforces updates to be on the UI thread (which implements INotifyPropertyChanged, etc). I have a class defined something like this: public class ClassToUpdate : UIObservableItem { private readonly Dispatcher mDispatcher = Dispatcher.CurrentDispatcher; private Boolean mPropertyToUpdate = false; public ClassToUpdate() : base() { } public Dispatcher Dispatcher { get { return mDispatcher; } } public Boolean PropertyToUpdate { get { return mPropertyToUpdate; } set { SetValue("PropertyToUpdate", ref mPropertyToUpdate, value; } } } I have an extension method class defined something like this: static class ExtensionMethods { public static IEnumerable<T> SetMyProperty<T>(this IEnumerable<T> sourceList, Boolean newValue) { ClassToUpdate firstClass = sourceList.FirstOrDefault() as ClassToUpdate; if (firstClass.Dispatcher.Thread.ManagedThreadId != System.Threading.Thread.CurrentThread.ManagedThreadId) { // WHAT GOES HERE? } else { foreach (var classToUpdate in sourceList) { (classToUpdate as ClassToUpdate ).PropertyToUpdate = newValue; yield return classToUpdate; } } } } Obviously, I'm looking for the "WHAT GOES HERE" in the extension method. Thanks, wTs

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• Why can't I get a TRUE return in this prepared statement?

  - by Cortopasta

  I can't seem to get this to do anything but return false. My best guess is that the prepared statement isn't executing, but I have no idea why. private function check_credentials($plain_username, $md5_password) { global $dbcon; $ac = new ac(); $ac->dbconnect(); $userid = $dbcon->prepare('SELECT id FROM users WHERE username = :username AND password = :password LIMIT 1'); $userid->bindParam(':username', $plain_username); $userid->bindParam(':password', $md5_password); $userid->execute(); $id = $userid->fetch(); Return $id; } *EDIT:*I've even tried hard coding the username and password into the function itself to try and isolate the problem like this: private function check_credentials($plain_username, $md5_password) { global $dbcon; $plain_username = "jim"; $md5_username = "waffles"; $ac = new ac(); $ac->dbconnect(); $userid = $dbcon->prepare('SELECT id FROM users WHERE username = :username AND password = :password LIMIT 1'); $userid->bindParam(':username', $plain_username); $userid->bindParam(':password', $md5_password); $userid->execute(); print_r($dbcon->errorInfo()); $id = $userid->fetch(); Return $id; } Still nothing :-/

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• How can I implement a proper counter bean with EJB 3.0?

  - by Aaron Digulla

  I have this entity bean: import javax.persistence.*; @Entity public class CounterTest { private int id; private int counter; @Id public int getId() { return id; } public void setId(int id) { this.id = id; } public int getCounter() { return counter; } public void setCounter(int counter) { this.counter = counter; } } and this stateful bean to increment a counter: import java.rmi.RemoteException; import javax.ejb.*; import javax.persistence.*; @Stateful public class CounterTestBean implements CounterTestRemote { @PersistenceContext(unitName = "JavaEE") EntityManager manager; public void initDB() { CounterTest ct = new CounterTest(); ct.setNr(1); ct.setWert(1); manager.persist(ct); } public boolean testCounterWithLock() { try { CounterTest ct = manager.find(CounterTest.class, 1); manager.lock(ct, LockModeType.WRITE); int wert = ct.getWert(); ct.setWert(wert + 1); manager.flush(); return true; } catch (Throwable t) { return false; } } } When I call testCounterWithLock() from three threads 500 times each, the counter gets incremented between 13 and 1279 times. How do I fix this code so that it is incremented 1500 times?

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• How do I setup NInject? (I'm getting can't resolve "Bind", in the line "Bind<IWeapon>().To<Sword>()

  - by Greg

  Hi, I'm getting confused in the doco how I should be setting up Ninject. I'm seeing different ways of doing it, some v2 versus v1 confusion probably included... Question - What is the best way in my WinForms application to set things up for NInject (i.e. what are the few lines of code required). I'm assuming this would go into the MainForm Load method. In other words what code do I have to have prior to getting to: Bind<IWeapon>().To<Sword>(); I have the following code, so effectively I just want to get clarification on the setup and bind code that would be required in my MainForm.Load() to end up with a concrete Samurai instance? internal interface IWeapon { void Hit(string target); } class Sword : IWeapon { public void Hit(string target) { Console.WriteLine("Chopped {0} clean in half", target); } } class Samurai { private IWeapon _weapon; [Inject] public Samurai(IWeapon weapon) { _weapon = weapon; } public void Attack(string target) { _weapon.Hit(target); } } thanks PS. I've tried the following code, however I can't resolve the "Bind". Where does this come from? what DLL or "using" statement would I be missing? private void MainForm_Load(object sender, EventArgs e) { Bind<IWeapon>().To<Sword>(); // <== *** CAN NOT RESOLVE Bind *** IKernel kernel = new StandardKernel(); var samurai = kernel.Get<Samurai>();

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• I/O between AIR client using Native process and executable java .jar

  - by aseem behl

  I am using Adobe AIR 2.0 native process API to launch a java executable jar. I/O is handled by writing to the input stream of the java process and reading from the output stream. The application is event based where several events are fired from the server. We catch these events in java code, handle them and write the output to the outputstream using the synchronized static method below. public class ReaderWriter { static Logger logger = Logger.getLogger(ReaderWriter.class); public synchronized static void writeToAir(String output){ try{ byte[] byteArray = output.getBytes(); DataOutputStream dataOutputStream = new DataOutputStream(System.out); dataOutputStream.write(byteArray); dataOutputStream.flush(); } catch (IOException e) { logger.info("Exception while writing the output. " + e); } } } The issue is that some messages are lost between the transfer and not all messages reach the AIR client. If I run the java application from the console I am receiving all the messages. It would be great if somebody could point out what I am missing. Following are some of the listeners used to send the event data to the AIR client. // class used to process Shutdown events from the Session private class SessionShutdownListener implements SessionListener{ public void onEvent(Event e) { Session.Shutdown sd = (Session.Shutdown) e; Session.ShutdownReason sr = sd.getReason(); String eventOutput = "eo;" + "Session Shutdown event ocurred reason=" + sr.strValue() + "\n"; ReaderWriter.writeToAir(eventOutput); } } // class used to process OperationSucceeded events from the Session private class SessionOperationSucceededListener implements SessionListener{ public void onEvent(Event e) { Session.OperationSucceeded os = (Session.OperationSucceeded) e; String eventOutput = "eo;" + "Session OperationSucceeded event ocurred" + "\n"; ReaderWriter.writeToAir(eventOutput); } }

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• How To Disable Curl Debug Output in PHP

  - by streetparade

  I wrote a PHP CUrl Class, if i execute Methods which should return the Content, it returns at first the Headers and after that the Content. So i cant parse any XML Data. I need to Disable This Sample Output. HTTP/1.1 200 OK Date: Thu, 01 Apr 2010 20:11:58 GMT Server: Apache/2.2.9 (Debian) PHP/5.2.6-1+lenny4 with Suhosin-Patch mod_ssl/2.2.9 OpenSSL/0.9.8g X-Powered-By: PHP/5.2.6-1+lenny4 Set-Cookie: PHPSESSID=44beccf62f87546140d4a0bd24bd28b0; path=/ Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache Transfer-Encoding: chunked Content-Type: application/xml Here is The Curl Class <?php class Test_Curl { protected $curl; protected $headers; protected $useragent; protected $url; protected $testkey; public function __construct() { } public function setUseraget($useragent) { $this->useragent = $useragent; return $this; } public function setApiKey($key) { $this->billomatApiKey = $key; } private function curlExecGeneral() { $result = curl_exec($this->curl); curl_close($this->curl); return $result; } private function curlInitGeneral($request) { $this->curl = curl_init($request); curl_setopt($this->curl, CURLOPT_HEADER, true); curl_setopt($this->curl, CURLOPT_HTTPHEADER, array("X-testkey: ".$this->testkey, "Content-Type: application/xml")); curl_setopt($this->curl, CURLOPT_RETURNTRANSFER, true); } public function get($request) { $this->curlInitGeneral($request); curl_setopt ($this->curl, CURLOPT_HTTPGET, true); return $this->curlExecGeneral(); } public function post($request, $xml) { $this->curlInitGeneral($request); curl_setopt ($this->curl, CURLOPT_POST, true); //set the Requestmethod to POST curl_setopt ($this->curl, CURLOPT_POSTFIELDS, $xml); //add the xml data to the Request return $this->curlExecGeneral(); } } ?>

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• How implement the Open Session in View pattern in NHibernate?

  - by MCardinale

  I'm using ASP.NET MVC + NHibernate + Fluent NHibernate and having a problem with lazy loading. Through this question (http://stackoverflow.com/questions/2519964/how-to-fix-a-nhibernate-lazy-loading-error-no-session-or-session-was-closed), I've discovered that I have to implement the Open Session in View pattern , but I don't know how. In my repositories classes, I use methods like this public ImageGallery GetById(int id) { using(ISession session = NHibernateSessionFactory.OpenSession()) { return session.Get<ImageGallery>(id); } } public void Add(ImageGallery imageGallery) { using(ISession session = NHibernateSessionFactory.OpenSession()) { using(ITransaction transaction = session.BeginTransaction()) { session.Save(imageGallery); transaction.Commit(); } } } And this is my Session Factory helper class: public class NHibernateSessionFactory { private static ISessionFactory _sessionFactory; private static ISessionFactory SessionFactory { get { if(_sessionFactory == null) { _sessionFactory = Fluently.Configure() .Database(MySQLConfiguration.Standard.ConnectionString(MyConnString)) .Mappings(m => m.FluentMappings.AddFromAssemblyOf<ImageGalleryMap>()) .ExposeConfiguration(c => c.Properties.Add("hbm2ddl.keywords", "none")) .BuildSessionFactory(); } return _sessionFactory; } } public static ISession OpenSession() { return SessionFactory.OpenSession(); } } Someone could help me to implements Open Session in View pattern? Thank you.

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• CSRF Protection in AJAX Requests using MVC2

  - by mnemosyn

  The page I'm building depends heavily on AJAX. Basically, there is just one "page" and every data transfer is handled via AJAX. Since overoptimistic caching on the browser side leads to strange problems (data not reloaded), I have to perform all requests (also reads) using POST - that forces a reload. Now I want to prevent the page against CSRF. With form submission, using Html.AntiForgeryToken() works neatly, but in AJAX-request, I guess I will have to append the token manually? Is there anything out-of-the box available? My current attempt looks like this: I'd love to reuse the existing magic. However, HtmlHelper.GetAntiForgeryTokenAndSetCookie is private and I don't want to hack around in MVC. The other option is to write an extension like public static string PlainAntiForgeryToken(this HtmlHelper helper) { // extract the actual field value from the hidden input return helper.AntiForgeryToken().DoSomeHackyStringActions(); } which is somewhat hacky and leaves the bigger problem unsolved: How to verify that token? The default verification implementation is internal and hard-coded against using form fields. I tried to write a slightly modified ValidateAntiForgeryTokenAttribute, but it uses an AntiForgeryDataSerializer which is private and I really didn't want to copy that, too. At this point it seems to be easier to come up with a homegrown solution, but that is really duplicate code. Any suggestions how to do this the smart way? Am I missing something completely obvious?

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• Using ReadOnlyCollection preventing me from setting up a bi-directional many-to-many relationship

  - by Kevin Pang

  I'm using NHibernate to persist a many-to-many relation between Users and Networks. I've set up both the User and Network class as follows, exposing each's collections as ReadOnlyCollections to prevent direct access to the underlying lists. I'm trying to make sure that the only way a User can be added to a Network is by using its "JoinNetwork" function. However, I can't seem to figure out how to add the User to the Network's list of users since its collection is readonly. public class User { private ISet<Network> _Networks = new HashedSet<Network>(); public ReadOnlyCollection<Network> Networks { get { return new List<Network>(_Networks).AsReadOnly(); } } public void JoinNetwork(Network network) { _Networks.Add(network); // How do I add the current user to the Network's list of users? } } public class Network { private ISet<User> _Users = new HashedSet<User>(); public ReadOnlyCollection<User> Users { get { return new List<User>(_Users).AsReadOnly(); } } }

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• I'm getting an error in my Java code but I can't see whats wrong with it. Help?

  - by Fraz

  The error i'm getting is in the fillPayroll() method in the while loop where it says payroll.add(employee). The error says I can't invoke add() on an array type Person but the Employee class inherits from Person so I thought this would be possible. Can anyone clarify this for me? import java.io.*; import java.util.*; public class Payroll { private int monthlyPay, tax; private Person [] payroll = new Person [1]; //Method adds person to payroll array public void add(Person person) { if(payroll[0] == null) //If array is empty, fill first element with person { payroll[payroll.length-1] = person; } else //Creates copy of payroll with new person added { Person [] newPayroll = new Person [payroll.length+1]; for(int i = 0;i<payroll.length;i++) { newPayroll[i] = payroll[i]; } newPayroll[newPayroll.length] = person; payroll = newPayroll; } } public void fillPayroll() { try { FileReader fromEmployee = new FileReader ("EmployeeData.txt"); Scanner data = new Scanner(fromEmployee); Employee employee = new Employee(); while (data.hasNextLine()) { employee.readData(data.nextLine()); payroll.add(employee); } } catch (FileNotFoundException e) { System.out.println("Error: File Not Found"); } } }

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• Partial template specialization on a class

  - by Jonathan Swinney

  I'm looking for a better way to this. I have a chunk of code that needs to handle several different objects that contain different types. The structure that I have looks like this: class Base { // some generic methods } template <typename T> class TypedBase : public Base { // common code with template specialization private: std::map<int,T> mapContainingSomeDataOfTypeT; } template <> class TypedBase<std::string> : public Base { // common code with template specialization public: void set( std::string ); // functions not needed for other types std::string get(); private: std::map<int,std::string> mapContainingSomeDataOfTypeT; // some data not needed for other types } Now I need to add some additional functionality that only applies to one of the derivative classes. Specifically the std::string derivation, but the type doesn't actually matter. The class is big enough that I would prefer not copy the whole thing simply to specialize a small part of it. I need to add a couple of functions (and accessor and modifier) and modify the body of several of the other functions. Is there a better way to accomplish this?

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• Problem inserting android.text.format.Time.toMillis value into SQLite DB on droid

  - by schusselig

  I'm writing an app for Android OS, and I need to store some time values in the SQLite DB. I have been using android.text.format.Time to store the time values in the app, and then inserting the values as millis into the DB as REAL values. On the SDK emulator, everything works perfectly. On the sole phone I've had the opportunity to test my app (so far), my duration code doesn't work as expected. Some relevant code: private static final String DATABASE_CREATE = "create table " + DATABASE_TABLE + " (" + KEY_ROWID + " integer primary key autoincrement, " + KEY_START + " REAL, " + KEY_STOP + " REAL, " + KEY_DUR + " REAL );"; ... private SQLiteDatabase mDb; ContentValues timerValues = new ContentValues(); ... timerValues.put(KEY_START, stime.toMillis(false)); timerValues.put(KEY_STOP, etime.toMillis(false)); timerValues.put(KEY_DURATION, stime.toMillis(false)-etime.toMillis(false)); int result = mDb.insert(DATABASE_TABLE, null, timerValues); I pull this data from two separate functions with slightly different bits of code, both using Time.set(long millis), both giving incorrect results: The start and stop values come back correct, but the duration comes out 17 hours too large. Am I missing something about calculating durations or does this just seem like there's something "special" about this particular droid? I'll have another droid to test on Monday, but any ideas are appreciated.

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• Javascript scope chain

  - by Geromey

  Hi, I am trying to optimize my program. I think I understand the basics of closure. I am confused about the scope chain though. I know that in general you want a low scope (to access variables quickly). Say I have the following object: var my_object = (function(){ //private variables var a_private = 0; return{ //public //public variables a_public : 1, //public methods some_public : function(){ debugger; alert(this.a_public); alert(a_private); }; }; })(); My understanding is that if I am in the some_public method I can access the private variables faster than the public ones. Is this correct? My confusion comes with the scope level of this. When the code is stopped at debugger, firebug shows the public variable inside the this keyword. The this word is not inside a scope level. How fast is accessing this? Right now I am storing any this.properties as another local variable to avoid accessing it multiple times. Thanks very much!

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• How to run an external SWF inside a Flex Application?

  - by lk

  I want to run an Action Script 3.0 Application into a Flex Application. To do this I've done the following: <?xml version="1.0" encoding="utf-8"?> <mx:WindowedApplication windowComplete="loadSwfApplication()" xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:Script> <![CDATA[ private function loadSwfApplication() { var urlRequest:URLRequest = new URLRequest("path/to/the/application.swf"); swfLoader.addEventListener(Event.COMPLETE, loadComplete); swfLoader.load(urlRequest); } private function loadComplete(completeEvent:Event) { var swfApplication:* = completeEvent.target.content; swfApplication.init(); // this is a Function that I made it in the Root class of swfApplication } ]]> </mx:Script> <mx:SWFLoader id="sfwLoader"/> </mx:WindowedApplication> The problem is that in the calling of swfApplication.init(); the AIR Player throws me an exception: Security sandbox violation: caller file:///path/to/the/application.swf cannot access Stage owned by app:/SWFApplicationLoader.swf. This is because somewhere in application.swf I use the stage like this: if (root.stage != null) root.stage.addEventListener(Event.REMOVED, someFunction); root.stage.stageFocusRect = false; How can I load this swf application and USE the stage without any problems?

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• Swing - how to mix JTextField and JTextAreas and have same visual appearance?

  - by I82Much

  I am using miglayout to create a form in which there are JTextFields (short input answers) as well as JTextAreas (Longer answers). The problem is twofold. The border placed around a Scrollpane wrapped text area does not match that of a Text Field. The width and placement of the textarea/textfield differ, causing them not to line up correctly. Source code: package test2; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.JTextField; import net.miginfocom.swing.MigLayout; public class Test extends JPanel { private static final int NUM_CHARACTERS_WIDTH = 20; private static final int NUM_ROWS = 5; public Test() { setLayout(new MigLayout( "wrap 2", // Align text labels on the so their right edge meets left edge of the text fields "[right][left]" )); add(new JLabel("Text field:")); add(new JTextField(NUM_CHARACTERS_WIDTH)); add(new JLabel("No scrollpane text area:")); add(new JTextArea(NUM_ROWS, NUM_CHARACTERS_WIDTH)); add(new JLabel("Scrollpane text area:")); add(new JScrollPane(new JTextArea(NUM_ROWS, NUM_CHARACTERS_WIDTH))); add(new JLabel("Text field:")); add(new JTextField(NUM_CHARACTERS_WIDTH)); } public static void main(String[] args) { JFrame frame = new JFrame(""); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel panel = new Test(); frame.add(panel); frame.pack(); frame.setVisible(true); } } What's the preferred way to mix and match jtextfield and jtextareas, while still maintaining visual harmony? I notice now that the text field has a blue highlight around it when focus is in it, as opposed to the text area... another source of visual discontinuity.

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• Is an "infinite" iterator bad design?

  - by Adamski

  Is it generally considered bad practice to provide Iterator implementations that are "infinite"; i.e. where calls to hasNext() always(*) return true? Typically I'd say "yes" because the calling code could behave erratically, but in the below implementation hasNext() will return true unless the caller removes all elements from the List that the iterator was initialised with; i.e. there is a termination condition. Do you think this is a legitimate use of Iterator? It doesn't seem to violate the contract although I suppose one could argue it's unintuitive. public class CyclicIterator<T> implements Iterator<T> { private final List<T> l; private Iterator it; public CyclicIterator<T>(List<T> l) { this.l = l; this.it = l.iterator(); } public boolean hasNext() { return !l.isEmpty(); } public T next() { T ret; if (!hasNext()) { throw new NoSuchElementException(); } else if (it.hasNext()) { ret = it.next(); } else { it = l.iterator(); ret = it.next(); } return ret; } public void remove() { it.remove(); } }

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• How to use EffectUpdate?

  - by coma

  So, this is my sample: <?xml version="1.0" encoding="utf-8"?> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark"> <fx:Style> @namespace s "library://ns.adobe.com/flex/spark"; @namespace mx "library://ns.adobe.com/flex/mx"; s|Application { background-color: #333333; } #info { padding-top: 5; padding-right: 5; padding-bottom: 5; padding-left: 5; font-size: 22; background-color: #ffffff; } #plane { corner-radius: 8; background-color: #1c1c1c; } </fx:Style> <fx:Script> import mx.events.*; private var steps:uint = 0; private function effectUpdateHandler(event:EffectEvent):void { info.text = "rotationY: " + plane.rotationY + " ; steps: " + steps; steps++; } </fx:Script> <fx:Declarations> <s:Rotate3D id="spin" target="{plane}" autoCenterTransform="true" angleYFrom="0" angleYTo="360" repeatCount="10" effectUpdate="effectUpdateHandler(event)" /> </fx:Declarations> <s:VGroup horizontalAlign="center" gap="50" width="100%"> <s:Label id="info" width="100%"/> <s:BorderContainer id="plane" width="200" height="200" click="spin.play()"/> </s:VGroup> </s:Application> and it doesn't make me happy.

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• Presence icon only showing for first person

  - by James123

  I am trying to show my colleagues in my custom webpart. So I adding presence Icon to each of colleague. It is showing fine when colleague is 1 only. If We have colleague more than 1 Presence Icon showing for 1st colleague you can dropdow that Icon also but other colleagues it is show simple Presense Icon (grayout) (not drop down is comming). code is like this. private static Panel GetUserInfo(UserProfile profile,Panel html, int cnt) { LiteralControl imnrc = new LiteralControl(); imnrc.Text = "<span style=\"padding: 0 5px 0 5px;\"><img border=\"0\" valign=\"middle\" height=\"12\" width=\"12\" src=\"/_layouts/images/imnhdr.gif\" onload=\"IMNRC('" + profile[PropertyConstants.WorkEmail].Value.ToString() + "')\" ShowOfflinePawn=1 id=\"IMID[GUID]\" ></span>"; html.Controls.Add(imnrc); html.Controls.Add(GetNameControl(profile)); //html.Controls.Add(new LiteralControl("<br>")); return html; } private static Control GetNameControl(UserProfile profile) { //bool hasMySite = profile[PropertyConstants.PublicSiteRedirect].Value == null ? false : true; bool hasMySite =string.IsNullOrEmpty(profile.PublicUrl.ToString()) ? false : true; string name = profile[PropertyConstants.PreferredName].Value.ToString(); if (hasMySite) { HyperLink control = new HyperLink(); control.NavigateUrl = String.IsNullOrEmpty(profile.PublicUrl.ToString()) ? null : profile.PublicUrl.ToString(); control.Style.Add("text-decoration","none"); control.Text = name; return control; } else { LiteralControl control = new LiteralControl(); control.Text = name; return control; } } http://i700.photobucket.com/albums/ww5/vsrikanth/presence-1.jpg

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• PostSharp when using DataContractSerializer?

  - by Dan Bryant

  I have an Aspect that implements INotifyPropertyChanged on a class. The aspect includes the following: [OnLocationSetValueAdvice, MethodPointcut("SelectProperties")] public void OnPropertySet(LocationInterceptionArgs args) { var currentValue = args.GetCurrentValue(); bool alreadyEqual = (currentValue == args.Value); // Call the setter args.ProceedSetValue(); // Invoke method OnPropertyChanged (ours, the base one, or the overridden one). if (!alreadyEqual) OnPropertyChangedMethod.Invoke(args.Location.Name); } This works fine when I instantiate the class normally, but I run into problems when I deserialize the class using a DataContractSerializer. This bypasses the constructor, which I'm guessing interferes with the way that PostSharp sets itself up. This ends up causing a NullReferenceException in an intercepted property setter, but before it has called the custom OnPropertySet, so I'm guessing it interferes with setting up the LocationInterceptionArgs. Has anyone else encountered this problem? Is there a way I can work around it? I did some more research and discovered I can fix the issue by doing this: [OnDeserializing] private void OnDeserializing(StreamingContext context) { AspectUtilities.InitializeCurrentAspects(); } I thought, okay, that's not too bad, so I tried to do this in my Aspect: private IEnumerable<MethodInfo> SelectDeserializing(Type type) { return type.GetMethods(BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public).Where( t => t.IsDefined(typeof (OnDeserializingAttribute), false)); } [OnMethodEntryAdvice, MethodPointcut("SelectDeserializing")] public void OnMethodEntry(MethodExecutionArgs args) { AspectUtilities.InitializeCurrentAspects(); } Unfortunately, even though it intercepts the method properly, it doesn't work. I'm thinking the call to InitializeCurrentAspects isn't getting transformed properly, since it's now inside the Aspect rather than directly inside the aspect-enhanced class. Is there a way I can cleanly automate this so that I don't have to worry about calling this on every class that I want to have the Aspect?

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• @Autowire strange problem

  - by Javi

  Hello, I have a strange behaviour when autowiring I have a similar code like this one, and it works @Controller public class Class1 { @Autowired private Class2 object2; ... } @Service @Transactional public class Class2{ ... } The problem is that I need that the Class2 implements an interface so I've only changed the Class2 so it's now like: @Controller public class Class1 { @Autowired private Class2 object2; ... } @Service @Transactional public class Class2 implements IServiceReference<Class3, Long>{ ... } public interface IServiceReference<T, PK extends Serializable> { public T reference(PK id); } with this code I get a org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type for Class2. It seems that @ Transitional annotation is not compatible with the interface because if I remove the @Transitional annotation or the "implements IServiceReference" the problem disapears and the bean is injected (though I need to have both in this class). It also happens if I put the annotation @Transitional in the methods instead of in the Class. I use Spring 3.0.2 if this helps. Is not compatible the interface with the transactional method? May it be a Spring bug? Thanks

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• svcutil, XmlSerializer and xsd:list

  - by Dmitry Ornatsky

  I'm using svcutil to generate classes from service metadata. This XML schema <xsd:complexType name="FindRequest"> ... <xsd:attribute name="Significance" type="Significance" use="optional" /> </xsd:complexType> <xsd:simpleType name="Significance"> <xsd:list> <xsd:simpleType> <xsd:restriction base="xsd:int"> <xsd:enumeration value="1" /> <xsd:enumeration value="2" /> <xsd:enumeration value="3" /> </xsd:restriction> </xsd:simpleType> </xsd:list> produces following code: public partial class FindRequest { ... private int significanceField; private bool significanceFieldSpecified; [System.Xml.Serialization.XmlAttributeAttribute()] public int Significance { get { return this.significanceField; } set { this.significanceField = value; } } [System.Xml.Serialization.XmlIgnoreAttribute()] public bool SignificanceSpecified { get { return this.significanceFieldSpecified; } set { this.significanceFieldSpecified = value; } } } My questions are: Is it possible to make XmlSerializer understand this type of list: <FindRequest Significance="1 2 3"/> For example by using some kind of a flags-style enum: public enum EmployeeStatus { [XmlEnum(Name = "1")] One = 1, [XmlEnum(Name = "2")] Two = 2, [XmlEnum(Name = "3")] Three = 4 } If the answer is yes, Is it possible to make svcutil/xsd.exe generate classes that are serialized that way without changing the schema?

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• C#, finding the largest prime factor of a number

  - by Juan

  Hello! I am new at programming and I am practicing my C# programming skills. My application is meant to find the largest prime factor of a number entered by the user. But my application is not returning the right answer and I dont really know where the problem is. Can you please help me? using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { Console.WriteLine("Calcular máximo factor primo de n. De 60 es 5."); Console.Write("Escriba un numero: "); long num = Convert.ToInt64(Console.ReadLine()); long mfp = maxfactor(num); Console.WriteLine("El maximo factor primo es: " + num); Console.Read(); } static private long maxfactor (long n) { long m=1 ; bool en= false; for (long k = n / 2; !en && k > 1; k--) { if (n % k == 0 && primo(k)) { m = k; en = true; } } return m; } static private bool primo(long x) { bool sp = true; for (long i = 2; i <= x / 2; i++) { if (x % i == 0) sp = false; } return sp; } } }

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• The type of field isn't supported by declared persistence strategy "OneToMany"

  - by Robert

  We are new to JPA and trying to setup a very simple one to many relationship where a pojo called Message can have a list of integer group id's defined by a join table called GROUP_ASSOC. Here is the DDL: CREATE TABLE "APP"."MESSAGE" ( "MESSAGE_ID" INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1) ); ALTER TABLE "APP"."MESSAGE" ADD CONSTRAINT "MESSAGE_PK" PRIMARY KEY ("MESSAGE_ID"); CREATE TABLE "APP"."GROUP_ASSOC" ( "GROUP_ID" INTEGER NOT NULL, "MESSAGE_ID" INTEGER NOT NULL ); ALTER TABLE "APP"."GROUP_ASSOC" ADD CONSTRAINT "GROUP_ASSOC_PK" PRIMARY KEY ("MESSAGE_ID", "GROUP_ID"); ALTER TABLE "APP"."GROUP_ASSOC" ADD CONSTRAINT "GROUP_ASSOC_FK" FOREIGN KEY ("MESSAGE_ID") REFERENCES "APP"."MESSAGE" ("MESSAGE_ID"); Here is the pojo: @Entity @Table(name = "MESSAGE") public class Message { @Id @Column(name = "MESSAGE_ID") @GeneratedValue(strategy = GenerationType.IDENTITY) private int messageId; @OneToMany(fetch=FetchType.LAZY, cascade=CascadeType.PERSIST) private List groupIds; public int getMessageId() { return messageId; } public void setMessageId(int messageId) { this.messageId = messageId; } public List getGroupIds() { return groupIds; } public void setGroupIds(List groupIds) { this.groupIds = groupIds; } } When we try to execute the following test code we get <openjpa-1.2.3-SNAPSHOT-r422266:907835 fatal user error> org.apache.openjpa.util.MetaDataException: The type of field "pojo.Message.groupIds" isn't supported by declared persistence strategy "OneToMany". Please choose a different strategy. Message msg = new Message(); List groups = new ArrayList(); groups.add(101); groups.add(102); EntityManager em = Persistence.createEntityManagerFactory("TestDBWeb").createEntityManager(); em.getTransaction().begin(); em.persist(msg); em.getTransaction().commit(); Help!

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• Loading and binding a serialized view model to a WPF window?

  - by generalt

  Hello all. I'm writing a one-window UI for a simple ETL tool. The UI consists of the window, the code behind for the window, a view model for the window, and the business logic. I wanted to provide functionality to the users to save the state of the UI because the content of about 10-12 text boxes will be reused between sessions, but are specific to the user. I figured I could serialize the view model, which contains all the data from the textboxes, and this works fine, but I'm having trouble loading the information in the serialized XML file back into the text boxes. Constructor of window: public ETLWindow() { InitializeComponent(); _viewModel = new ViewModel(); this.DataContext = _viewModel; _viewModel.State = Constants.STATE_IDLE; Loaded += new RoutedEventHandler(MainWindow_Loaded); } XAML: <TextBox x:Name="targetDirectory" IsReadOnly="true" Text="{Binding TargetDatabaseDirectory, UpdateSourceTrigger=PropertyChanged}"/> ViewModel corresponding property: private string _targetDatabaseDirectory; [XmlElement()] public string TargetDatabaseDirectory { get { return _targetDatabaseDirectory; } set { _targetDatabaseDirectory = value; OnPropertyChanged(DataUtilities.General.Utilities.GetPropertyName(() => new ViewModel().TargetDatabaseDirectory)); } Load event in code behind: private void loadState_Click(object sender, RoutedEventArgs e) { string statePath = this.getFilePath(); _viewModel = ViewModel.LoadModel(statePath); } As you can guess, the LoadModel method deserializes the serialized file on the user's drive. I couldn't find much on the web regarding this issue. I know this probably has something to do with my bindings. Is there some way to refresh on the bindings on the XAML after I deserialize the view model? Or perhaps refresh all properties on the view model? Or am I completely insane thinking any of this could be done? Thanks.

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