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
newEntries.add(newEntry);
				found= true;
			} else {
				newEntries.add(curr);
			}
		}
		if (!found) {
			if (newEntry.getSourceAttachmentPath() == null || !putJarOnClasspathDialog(shell)) {
				return null;
			}
			
			newEntries.add(newEntry);			
		}
		return (IClasspathEntry[]) newEntries.toArray(new IClasspathEntry[newEntries.size()]);
	}	
				
	private boolean putJarOnClasspathDialog(Shell shell) {
		final boolean[] result= new boolean[1];
		shell.getDisplay().syncExec(new Runnable() {
			public void run() {
				String title= NewWizardMessages.getString("SourceAttachmentBlock.putoncpdialog.title"); 
				String message= NewWizardMessages.getString("SourceAttachmentBlock.putoncpdialog.message"); 
				result[0]= MessageDialog.openQuestion(JavaPlugin.getActiveWorkbenchShell(), title, message);
			}
		});
		return result[0];
	}
		
}