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
dialog.setInitialSelection(initSel);
		if (dialog.open() == dialog.OK) {
			IFile file= (IFile) dialog.getFirstResult();
			return file.getFullPath();
		}
		return null;
	}
	
	/*
	 * Opens a dialog to choose path in a zip file.
	 */		
	private IPath choosePrefix() {
		if (fResolvedFile != null) {
			IPath currPath= new Path(fPrefixField.getText());
			String initSelection= null;
			if (fIsVariableEntry) {
				IPath resolvedPath= getResolvedPath(currPath);
				if (resolvedPath != null) {
					initSelection= resolvedPath.toString();
				}
			} else {
				initSelection= currPath.toString();
			}
			try {
				ZipFile zipFile= new ZipFile(fResolvedFile);			
				ZipContentProvider contentProvider= new ZipContentProvider();
				contentProvider.setInitialInput(zipFile);
				ElementTreeSelectionDialog dialog= new ElementTreeSelectionDialog(getShell(), new ZipLabelProvider(), contentProvider); 
				dialog.setAllowMultiple(false);
				dialog.setTitle(NewWizardMessages.getString("SourceAttachmentBlock.prefixdialog.title"));