AbstractTreeViewerFilter.java 文件源码

private boolean hasUnfilteredChild(TreeViewer viewer, TreePath parentPath, Object element) {
    TreePath elementPath = parentPath.createChildPath(element);
    IContentProvider contentProvider = viewer.getContentProvider();
    Object[] children = contentProvider instanceof ITreePathContentProvider
            ? ((ITreePathContentProvider) contentProvider).getChildren(elementPath)
            : ((ITreeContentProvider) contentProvider).getChildren(element);

    /* avoid NPE + guard close */
    if (children == null || children.length == 0) {
        return false;
    }
    for (int i = 0; i < children.length; i++) {
        if (selectTreePath(viewer, elementPath, children[i])) {
            return true;
        }
    }
    return false;
}