| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.jackrabbit.oak.spi.commit; |
| |
| import static com.google.common.base.Preconditions.checkElementIndex; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import org.apache.jackrabbit.oak.spi.state.NodeState; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Editor wrapper that passes only changes in the specified subtree to |
| * the given delegate editor. |
| * |
| * @since Oak 0.7 |
| */ |
| public class SubtreeEditor extends DefaultEditor { |
| |
| private final Editor editor; |
| |
| private final String[] path; |
| |
| private final int depth; |
| |
| private SubtreeEditor(Editor editor, String[] path, int depth) { |
| this.editor = checkNotNull(editor); |
| this.path = checkNotNull(path); |
| checkElementIndex(depth, path.length); |
| this.depth = depth; |
| } |
| |
| public SubtreeEditor(Editor editor, String... path) { |
| this(editor, path, 0); |
| } |
| |
| private Editor descend(String name) { |
| if (!name.equals(path[depth])) { |
| return null; |
| } else if (depth + 1 < path.length) { |
| return new SubtreeEditor(editor, path, depth + 1); |
| } else { |
| return editor; |
| } |
| } |
| |
| @Override @Nullable |
| public Editor childNodeAdded(String name, NodeState after) { |
| return descend(name); |
| } |
| |
| @Override @Nullable |
| public Editor childNodeChanged( |
| String name, NodeState before, NodeState after) { |
| return descend(name); |
| } |
| |
| @Override @Nullable |
| public Editor childNodeDeleted(String name, NodeState before) { |
| return descend(name); |
| } |
| |
| } |