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1   /*
2    * Copyright 2009 University Corporation for Advanced Internet Development, Inc.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    * http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.opensaml.ws.message.handler;
18  
19  import java.util.Collections;
20  import java.util.List;
21  
22  import org.opensaml.ws.message.MessageContext;
23  import org.opensaml.xml.util.LazyList;
24  
25  /** A simple handler chain resolver implementation that returns a static list of handler chains. */
26  public class StaticHandlerChainResolver implements HandlerChainResolver {
27      
28      /** Registered handler chains. */
29      private List<HandlerChain> handlerChains;
30  
31      /**
32       * Constructor.
33       * 
34       * @param newHandlerChain the static handler chain returned by this resolver
35       */
36      public StaticHandlerChainResolver(HandlerChain newHandlerChain) {
37          handlerChains = new LazyList<HandlerChain>();
38          if(newHandlerChain != null){
39              handlerChains.add(newHandlerChain);
40          }
41      }
42      
43      /**
44       * Constructor.
45       * 
46       * @param newHandlerChains the static list of handler chains returned by this resolver
47       */
48      public StaticHandlerChainResolver(List<HandlerChain> newHandlerChains) {
49          handlerChains = new LazyList<HandlerChain>();
50          if(newHandlerChains != null){
51              handlerChains.addAll(newHandlerChains);
52          }
53      }
54  
55      /** {@inheritDoc} */
56      public Iterable<HandlerChain> resolve(MessageContext messageContext) throws HandlerException {
57          return Collections.unmodifiableList(handlerChains);
58      }
59  
60  }