001 package org.apache.turbine.pipeline;
002
003 import java.util.HashMap;
004 import java.util.Map;
005
006
007 /*
008 * Licensed to the Apache Software Foundation (ASF) under one
009 * or more contributor license agreements. See the NOTICE file
010 * distributed with this work for additional information
011 * regarding copyright ownership. The ASF licenses this file
012 * to you under the Apache License, Version 2.0 (the
013 * "License"); you may not use this file except in compliance
014 * with the License. You may obtain a copy of the License at
015 *
016 * http://www.apache.org/licenses/LICENSE-2.0
017 *
018 * Unless required by applicable law or agreed to in writing,
019 * software distributed under the License is distributed on an
020 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
021 * KIND, either express or implied. See the License for the
022 * specific language governing permissions and limitations
023 * under the License.
024 */
025
026
027 /**
028 * <p>A <b>PipelineData</b> is a holder for data being passed from one
029 * Valve to the next.
030 * The detailed contract for a Valve is included in the description of
031 * the <code>invoke()</code> method below.</p>
032 *
033 * <b>HISTORICAL NOTE</b>: The "PipelineData" name was assigned to this
034 * holder as it functions similarily to the RunData object, but without
035 * the additional methods
036 *
037 * @author <a href="mailto:epugh@opensourceconnections.com">Eric Pugh</a>
038 * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
039 */
040 public class DefaultPipelineData implements PipelineData
041 {
042 private final Map<Class<?>, Map<?, ?>> map = new HashMap<Class<?>, Map<?, ?>>();
043
044 public void put(Class<?> key, Map<?, ?> value)
045 {
046 map.put(key, value);
047 }
048
049 public Map<?, ?> get(Class key)
050 {
051 return map.get(key);
052 }
053
054 public Object get(Class<?> key, Object innerKey)
055 {
056 Map<?, ?> innerMap = get(key);
057 if (innerMap == null)
058 {
059 return null;
060 }
061 return innerMap.get(innerKey);
062 }
063
064
065 }