| package org.apache.commons.digester3.examples.plugins.pipeline; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.LinkedList; |
| import java.util.Iterator; |
| |
| import org.apache.commons.digester3.Digester; |
| import org.apache.commons.digester3.plugins.PluginCreateRule; |
| |
| /** |
| * An implementation of the Transform interface which is configured with |
| * a sequence of "subtransforms", and applies them one by one to the input |
| * data. |
| * <p> |
| * This demonstrates that a plugged-in class can itself define plugin-points |
| * for user-defined classes if it wishes. |
| */ |
| public class CompoundTransform |
| implements Transform |
| { |
| |
| private LinkedList<Transform> transforms = new LinkedList<Transform>(); |
| |
| public void addTransform( Transform transform ) |
| { |
| transforms.add( transform ); |
| } |
| |
| @Override |
| public String transform( String s ) |
| { |
| for ( Iterator<Transform> i = transforms.iterator(); i.hasNext(); ) |
| { |
| Transform t = i.next(); |
| s = t.transform( s ); |
| } |
| return s; |
| } |
| |
| public static void addRules( Digester d, String patternPrefix ) |
| { |
| PluginCreateRule pcr = new PluginCreateRule( Transform.class ); |
| d.addRule( patternPrefix + "/subtransform", pcr ); |
| d.addSetNext( patternPrefix + "/subtransform", "addTransform" ); |
| } |
| |
| } |