| /* |
| * 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.myfaces.view.facelets.tag; |
| |
| import javax.faces.view.facelets.Tag; |
| import javax.faces.view.facelets.TagDecorator; |
| import org.apache.myfaces.util.lang.Assert; |
| |
| /** |
| * A TagDecorator that is composed of 1 or more TagDecorator instances. It uses the chain of responsibility pattern to |
| * stop processing if any of the TagDecorators return a value other than null. |
| * |
| * @author Jacob Hookom |
| * @version $Id$ |
| */ |
| public final class CompositeTagDecorator implements TagDecorator |
| { |
| |
| private final TagDecorator[] decorators; |
| |
| public CompositeTagDecorator(TagDecorator[] decorators) |
| { |
| Assert.notNull(decorators, "decorators"); |
| this.decorators = decorators; |
| } |
| |
| /** |
| * Uses the chain of responsibility pattern to stop processing if any of the TagDecorators return a value other than |
| * null. |
| * |
| * @see javax.faces.view.facelets.TagDecorator#decorate(javax.faces.view.facelets.Tag) |
| */ |
| @Override |
| public Tag decorate(Tag tag) |
| { |
| Tag t = null; |
| for (int i = 0; i < this.decorators.length; i++) |
| { |
| t = this.decorators[i].decorate(tag); |
| if (t != null) |
| { |
| return t; |
| } |
| } |
| return tag; |
| } |
| |
| } |
| |