Bug 11814 OpenExternalJavadoc action should not call findElement on JAR
This causes an exception: Java Model Exception: Java Model Status [Invalid path: C:/Java/IBM1.3/jre/lib/rt.jar.] at org.eclipse.jdt.internal.core.JavaProject.findElement(JavaProject.java:435) at org.eclipse.jdt.internal.ui.actions.OpenExternalJavadocAction.run(OpenExternalJavadocAction.java:102) at org.eclipse.ui.texteditor.RetargetTextEditorAction.run(RetargetTextEditorAction.java:103) at org.eclipse.jface.action.Action.runWithEvent(Action.java:473) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:407) at org.eclipse.jface.action.ActionContributionItem.handleWidgetEvent(ActionContributionItem.java(Compiled Code)) at org.eclipse.jface.action.ActionContributionItem$ActionListener.handleEvent(ActionContributionItem.java(Compiled Code)) at org.eclipse.jface.action.ActionContributionItem$ActionListener.handleEvent(ActionContributionItem.java(Compiled Code)) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java(Compiled Code)) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java(Compiled Code)) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java(Compiled Code)) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java(Compiled Code)) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java(Compiled Code)) at org.eclipse.ui.internal.Workbench.run(Workbench.java:698) at org.eclipse.core.internal.boot.InternalBootLoader.run(InternalBootLoader.java:777) at org.eclipse.core.boot.BootLoader.run(BootLoader.java:319) at java.lang.reflect.Method.invoke(Native Method) at org.eclipse.core.launcher.Main.basicRun(Main.java:196) at org.eclipse.core.launcher.Main.run(Main.java:555) at org.eclipse.core.launcher.UIMain.main(UIMain.java:52) 4 org.eclipse.jdt.core 979 Invalid path: C:/Java/IBM1.3/jre/lib/rt.jar.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/SourceAttachmentBlock.java
public SourceAttachmentBlock(IWorkspaceRoot root, IStatusChangeListener context, IClasspathEntry oldEntry) {
		fContext= context;
				
		fRoot= root;
		fOldEntry= oldEntry;
		
		
		fIsVariableEntry= (oldEntry.getEntryKind() == IClasspathEntry.CPE_VARIABLE);
		
		fNameStatus= new StatusInfo();
		fPrefixStatus= new StatusInfo();
		fJavaDocStatus= new StatusInfo();		
		
		fJARPath= (oldEntry != null) ? oldEntry.getPath() : Path.EMPTY;
		
		SourceAttachmentAdapter adapter= new SourceAttachmentAdapter();
		
		
		if (fIsVariableEntry) {
			fFileNameField= new VariablePathDialogField(adapter);
			fFileNameField.setDialogFieldListener(adapter);
			fFileNameField.setLabelText(NewWizardMessages.getString("SourceAttachmentBlock.filename.varlabel")); 
			fFileNameField.setButtonLabel(NewWizardMessages.getString("SourceAttachmentBlock.filename.external.varbutton")); 
			((VariablePathDialogField)fFileNameField).setVariableButtonLabel(NewWizardMessages.getString("SourceAttachmentBlock.filename.variable.button")); 
		
			fPrefixField= new VariablePathDialogField(adapter);
			fPrefixField.setDialogFieldListener(adapter);
			fPrefixField.setLabelText(NewWizardMessages.getString("SourceAttachmentBlock.prefix.varlabel")); 
			fPrefixField.setButtonLabel(NewWizardMessages.getString("SourceAttachmentBlock.prefix.varbutton"));