This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.
| Summary: | NPE while invoking formEditorCookie.reloadForm() | ||
|---|---|---|---|
| Product: | guibuilder | Reporter: | Ayub Khan <ayubskhan> |
| Component: | Code | Assignee: | issues@guibuilder <issues> |
| Status: | RESOLVED INVALID | ||
| Severity: | blocker | ||
| Priority: | P1 | ||
| Version: | 4.x | ||
| Hardware: | All | ||
| OS: | All | ||
| Issue Type: | DEFECT | Exception Reporter: | |
Note that the form module doesn't have a public API and therefore it is not recommended to depend on it - the implementation can change in any way without notification. Particularly the reloadForm() method is an implementation detail of the form module and there is no contract that the method should satisfy. If you really want to call it (in spite of the previous fact) it is up to you to ensure that it is called in a valid context (e.g. don't invoke it on the forms that are not opened). |
I have an application that tries to reload a form document like this // Get the DataObject DataObject dataObject=DataObject.find(file); EditorCookie cookie=(EditorCookie)dataObject.getCookie(EditorCookie.class); if(cookie!=null) { if(tmpcookie instanceof FormEditorSupport) { FormEditorSupport formCookie = (FormEditorSupport)tmpcookie; formCookie.reloadForm(); <--- NPE occurs here } I get NPE on reloadForm() invocation, if the document is not opened. This error does not happen if the document is open, while invoking reloadForm(). java.lang.NullPointerException at org.netbeans.modules.form.FormEditorSupport.reloadDocument(FormEditorSupport.java:717) at org.openide.text.CloneableEditorSupport.checkReload(CloneableEditorSupport.java:1744) at org.openide.text.CloneableEditorSupport.access$1600(CloneableEditorSupport.java:79) at org.openide.text.CloneableEditorSupport$9.run(CloneableEditorSupport.java:2112) at org.netbeans.editor.BaseDocument.runAtomicAsUser(BaseDocument.java:1086) at org.netbeans.editor.GuardedDocument.runAtomic(GuardedDocument.java:217) at org.openide.text.NbDocument.runAtomic(NbDocument.java:341) [catch] at org.openide.text.CloneableEditorSupport$9.run(CloneableEditorSupport.java:2108) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:461) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234) 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)