Eclipse插件开发中（右键属性插件）遇到的ClassCastEcxeption

在开发针对Eclipse中右键属性列表的插件时，遇到CompilationUnit、PackageFragment、PackageFragmentRoot、JavaProject无法正常转化，选中的对象携带的信息无法正常的通过类的转换得到。

解决方案：java的反射机制

主要代码：

1. CompilationUnit

Class clazz = element.getClass().getSuperclass().getSuperclass();

Field field = clazz .getDeclaredField("parent");

field.setAccessible(true);

Object packageFragment = field.get(element);

Object packageFragmentRoot = field.get(packageFragment);

field = packageFragmentRoot.getClass().getDeclaredField("resource");

field.setAccessible(true);

Object folder = field.get(packageFragmentRoot);

field = folder.getClass().getSuperclass().getSuperclass().getDeclaredField("workspace");

field.setAccessible(true);

Object workspace = field.get(folder);

field = workspace.getClass().getDeclaredField("defaultRoot");

field.setAccessible(true);

Object defaultRoot = field.get(workspace);

field = defaultRoot.getClass().getDeclaredField("workspaceLocation");

field.setAccessible(true);

Object workspaceLocation = field.get(defaultRoot);

workspaceLocation.toString();

 

2. PackageFragment

Class clazz = element.getClass().getSuperclass().getSuperclass();

Field field = clazz .getDeclaredField("parent");

field.setAccessible(true);

Object packageFragment = field.get(element);

field = packageFragment.getClass().getDeclaredField("resource");

field.setAccessible(true);

Object folder = field.get(packageFragment);

field = folder.getClass().getSuperclass().getSuperclass().getDeclaredField("workspace");

field.setAccessible(true);

Object workspace = field.get(folder);

field = workspace.getClass().getDeclaredField("defaultRoot");

field.setAccessible(true);

Object defaultRoot = field.get(workspace);

field = defaultRoot.getClass().getDeclaredField("workspaceLocation");

field.setAccessible(true);

Object workspaceLocation = field.get(defaultRoot);

workspaceLocation.toString();

 

3. PackageFragmentRoot

Class clazz = element.getClass().getSuperclass().getSuperclass();

Field field = clazz .getDeclaredField("parent");

field.setAccessible(true);

Object parent = field.get(element);

field = parent.getClass().getDeclaredField("project");

field.setAccessible(true);

Object folder = field.get(parent);

field = folder.getClass().getSuperclass().getSuperclass().getDeclaredField("workspace");

field.setAccessible(true);

Object workspace = field.get(folder);

field = workspace.getClass().getDeclaredField("defaultRoot");

field.setAccessible(true);

Object defaultRoot = field.get(workspace);

field = defaultRoot.getClass().getDeclaredField("workspaceLocation");

field.setAccessible(true);

Object workspaceLocation = field.get(defaultRoot);

workspaceLocation.toString();

 

4. JavaProject

Class clazz = element.getClass().getSuperclass().getSuperclass();

Field field = clazz .getDeclaredField("workspace");

field.setAccessible(true);

Object workspace = field.get(element);

field = workspace.getClass().getDeclaredField("defaultRoot");

field.setAccessible(true);

Object defaultRoot = field.get(workspace);

field = defaultRoot.getClass().getDeclaredField("workspaceLocation");

field.setAccessible(true);

Object workspaceLocation = field.get(defaultRoot);

workspaceLocation.toString();