| /* |
| * 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.plugins.observation; |
| |
| import org.apache.jackrabbit.oak.api.PropertyState; |
| import org.apache.jackrabbit.oak.plugins.observation.filter.EventFilter; |
| import org.apache.jackrabbit.oak.spi.state.NodeState; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Filtered event handler. This decorator class applies an {@link EventFilter} |
| * on all detected changes, and forwards the filtered change events to a given |
| * delegate handler. |
| */ |
| public class FilteredHandler extends DefaultEventHandler { |
| |
| private final EventFilter filter; |
| |
| private final EventHandler handler; |
| |
| public FilteredHandler(EventFilter filter, EventHandler handler) { |
| this.filter = filter; |
| this.handler = handler; |
| } |
| |
| |
| @Override |
| public void enter(NodeState before, NodeState after) { |
| handler.enter(before, after); |
| } |
| |
| @Override |
| public void leave(NodeState before, NodeState after) { |
| handler.leave(before, after); |
| } |
| |
| @Override @Nullable |
| public EventHandler getChildHandler( |
| String name, NodeState before, NodeState after) { |
| EventFilter f = filter.create(name, before, after); |
| if (f != null) { |
| EventHandler h = handler.getChildHandler(name, before, after); |
| if (h != null) { |
| return new FilteredHandler(f, h); |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public void propertyAdded(PropertyState after) { |
| if (filter.includeAdd(after)) { |
| handler.propertyAdded(after); |
| } |
| } |
| |
| @Override |
| public void propertyChanged(PropertyState before, PropertyState after) { |
| if (filter.includeChange(before, after)) { |
| handler.propertyChanged(before, after); |
| } |
| } |
| |
| @Override |
| public void propertyDeleted(PropertyState before) { |
| if (filter.includeDelete(before)) { |
| handler.propertyDeleted(before); |
| } |
| } |
| |
| @Override |
| public void nodeAdded(String name, NodeState after) { |
| if (filter.includeAdd(name, after)) { |
| handler.nodeAdded(name, after); |
| } |
| } |
| |
| @Override |
| public void nodeDeleted(String name, NodeState before) { |
| if (filter.includeDelete(name, before)) { |
| handler.nodeDeleted(name, before); |
| } |
| } |
| |
| @Override |
| public void nodeMoved(String sourcePath, String name, NodeState moved) { |
| if (filter.includeMove(sourcePath, name, moved)) { |
| handler.nodeMoved(sourcePath, name, moved); |
| } |
| } |
| |
| @Override |
| public void nodeReordered(String destName, String name, NodeState reordered) { |
| if (filter.includeReorder(destName, name, reordered)) { |
| handler.nodeReordered(destName, name, reordered); |
| } |
| } |
| |
| } |