Java editor : NullPointerException : non-null project required

Question

hi
While editing a Java source file, I get this exception on the "jdev.exe console" :
Warning, runtime exception caught: java.lang.NullPointerException: non-null project required
java.lang.NullPointerException: non-null project required
        at oracle.jdeveloper.java.JavaManager.getJavaManager(JavaManager.java:73)
        at oracle.jdevimpl.java.Context2ParserHelper.getJavaManager(Context2ParserHelper.java:113)
        at oracle.jdevimpl.java.Context2ParserHelper.getSourceFile(Context2ParserHelper.java:124)
        at oracle.jdevimpl.java.editing.JavaSmartClipboard.getSourceFile(JavaSmartClipboard.java:182)
        at oracle.jdevimpl.java.editing.JavaSmartClipboard.isInStringLiteral(JavaSmartClipboard.java:382)
        at oracle.jdevimpl.java.editing.JavaSmartClipboard.fillClipboard(JavaSmartClipboard.java:253)
        at oracle.jdevimpl.java.editing.JavaSmartClipboard.copy(JavaSmartClipboard.java:218)
        at oracle.jdevimpl.java.editing.JavaSmartClipboard.invokeAction(JavaSmartClipboard.java:100)
        at oracle.jdevimpl.java.editing.JavaEditingPlugin.invokeAction(JavaEditingPlugin.java:585)
        at oracle.javatools.editor.BasicEditorPane.invokeAction(BasicEditorPane.java:1949)
        at oracle.ide.ceditor.keymap.IdeKeymapHelper.invokeAction(IdeKeymapHelper.java:181)
        at oracle.javatools.editor.keys.MultiKeyHandler.keyPressed(MultiKeyHandler.java:334)
        at java.awt.Component.processKeyEvent(Component.java:5446)
        at javax.swing.JComponent.processKeyEvent(JComponent.java:2713)
        at java.awt.Component.processEvent(Component.java:5265)
        at java.awt.Container.processEvent(Container.java:1966)
        at java.awt.Component.dispatchEventImpl(Component.java:3955)
        at java.awt.Container.dispatchEventImpl(Container.java:2024)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1810)
        at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:672)
        at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:920)
        at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:798)
        at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:636)
        at java.awt.Component.dispatchEventImpl(Component.java:3841)
        at java.awt.Container.dispatchEventImpl(Container.java:2024)
        at java.awt.Window.dispatchEventImpl(Window.java:1774)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)This happens with things like Ctrl+C (copy) or Ctrl+Space (code insight).
Typing characters still works, but I would like some other basic features like "copy and paste" to work again.
Any suggestions?
(using JDeveloper 10.1.3.2.0.4066)
many thanks
Jan Vervecken

Answer 1

Thanks for the update Brian.
At first I had never heard of the name "PoemaFenix.jws" and because of that I thought it was JDeveloper that added the "Fenix" suffix because of some illegal state.
But because of your update today, I looked into this and found some references to "PoemaFenix.jws" in the "dependencyList" of some of our .jpr files as "sourceOwnerURL". (These could have been introduced a while back when someone rearranged some of our project files, although I haven't been able to get this confirmed.)
Anyway, I did not try the workaround you suggested, but I updated the .jpr files replacing "PoemaFenix.jws" with the correct name "Poema.jws" and I was not able to reproduce the issue using the scenario I used before. So, that looks like it solved the issue here (and the activeWorkspaceURL is <path>Poema.jws again).
I also tried the following scenario to check how this could have been introduced:
(1) create an application "MyFirstApp", resulting in "MyFirstApp.jws"
(2) create two empty projects "Model" and "ViewController"
(3) configure the ViewController project to be dependent on the Model project
(4) Save All, and click the "Remove from Applications" icon while "MyFirstApp" is selected in the Applications Navigator
(5) on the file system rename "MyFirstApp.jws" to "MySecondApp.jws"
(6) open "MySecondApp.jws" in JDeveloper
(7) on the ViewController project properties dependencies panel toggle the checkbox for the Model project off and on again, click OK
This resulted in a "ViewController.jpr" file containing this:
   <hash n="oracle.ide.model.DependencyConfiguration">
      <list n="dependencyList">
         <hash>
            <value n="class" v="oracle.jdeveloper.library.ProjectLibrary"/>
            <url n="sourceOwnerURL" path="../MyFirstApp.jws"/>
            <url n="sourceURL" path="../Model/Model.jpr"/>
         </hash>
         <hash>
            <value n="class" v="oracle.jdeveloper.library.ProjectLibrary"/>
            <url n="sourceOwnerURL" path="../MySecondApp.jws"/>
            <url n="sourceURL" path="../Model/Model.jpr"/>
         </hash>
      </list>
   </hash>I would think the reference to MyFirstApp.jws should no longer be there.
(Maybe the sourceOwnerURL values should be updated in step (6) of the above scenario, which is also not the case.)
regards
Jan Vervecken