java - Eclipse RCP:clonePerspective返回null

我想克隆一个透视图并保存该克隆的透视图。但是，对PerspectiveRegistry.clonePerspective(...)的调用返回null，并且我的想法用光了，我的参数值可能有问题。

public void savePerspectiveAs(String label) {
    IWorkbenchPage page = PlatformUI.getWorkbench()
            .getActiveWorkbenchWindow().getActivePage();
    IPerspectiveDescriptor perspectiveDescriptor = perspectiveRegistry
            .findPerspectiveWithLabel(label);

    // if the perspective doesn't exist, create a new one
    // by cloning the current perspective
    if (perspectiveDescriptor == null) {
        IPerspectiveDescriptor currentPerspectiveDescriptor =
                perspectiveRegistry.findPerspectiveWithId(currentPerspective);
        // after this line, perspectiveDescriptor is still null
        perspectiveDescriptor = perspectiveRegistry
                .clonePerspective(currentPerspective + "."
                         + label.replaceAll(" ", "_"), label,
                         currentPerspectiveDescriptor);
        // hence I get a NullPointerException here...
        connectedPerspectives.add(perspectiveDescriptor.getId());
    }
    page.savePerspectiveAs(perspectiveDescriptor);

}

所有其他值似乎都很好。 currentPerspectiveDescriptor是有效对象，perspectiveRegistry也是如此。

label类似于"Connected Perspective 2"。它尚不存在，我创建的透视图ID也没有。

有任何想法吗？ clonePerspective(...)返回空值在这里可能出什么问题？

最佳答案

Eclipse 4.x不支持clonePerspective。

这是PerspectiveRegistry.clonePerspective的代码：

public IPerspectiveDescriptor clonePerspective(String id, String label,
        IPerspectiveDescriptor desc) throws IllegalArgumentException {
    // FIXME: compat clonePerspective. Not called in 3.8
    E4Util.unsupported("clonePerspective"); //$NON-NLS-1$
    return null;
}

Eclipse错误是382209

关于java - Eclipse RCP:clonePerspective返回null，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/26384842/