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
if (fFileVariablePath == null) {
					status.setError(NewWizardMessages.getString("SourceAttachmentBlock.filename.error.varnotexists")); 
					return status;
				}
				resolvedPath= fFileVariablePath.append(filePath.removeFirstSegments(1));
				
				if (resolvedPath.isEmpty()) {
					status.setWarning(NewWizardMessages.getString("SourceAttachmentBlock.filename.warning.varempty")); 
					return status;
				}
				File file= resolvedPath.toFile();
				if (!file.isFile()) {				
					String message= NewWizardMessages.getFormattedString("SourceAttachmentBlock.filename.error.filenotexists", resolvedPath.toOSString()); 
					status.setWarning(message);
					return status;
				}						
				fResolvedFile= file;
				
			} else {
				File file= filePath.toFile();
				IResource res= fRoot.findMember(filePath);
				if (res != null) {
					file= res.getLocation().toFile();
				}
				if (!file.isFile()) {
					String message=  NewWizardMessages.getFormattedString("SourceAttachmentBlock.filename.error.filenotexists", filePath.toString()); 
					status.setError(message);
					return status;
				}
				fResolvedFile= file;