NavigationTree


1   /*
2    * Copyright 2004 Outerthought bvba and Schaubroeck nv
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  package org.outerj.daisy.navigation.impl;
17  
18  import org.outerj.daisy.repository.VariantKey;
19  import org.outerj.daisy.repository.RepositoryException;
20  
21  import java.util.Map  ;
22  import java.util.HashMap  ;
23  
24  public class NavigationTree {
25      private Node node;
26      private Map   nodeLookupMap;
27  
28      public NavigationTree(Node node) {
29          this.node = node;
30      }
31  
32      public Node getNode() {
33          return node;
34      }
35  
36      public String   lookupNode(VariantKey variantKey) throws RepositoryException {
37          if (nodeLookupMap == null) {
38              synchronized (this) {
39                  if (nodeLookupMap == null) {
40                      Map   map = new HashMap  ();
41                      node.populateNodeLookupMap(map, "");
42                      this.nodeLookupMap = map;
43                  }
44              }
45          }
46          return (String  )nodeLookupMap.get(variantKey);
47      }
48  
49      public void refresh() {
50          nodeLookupMap = null;
51      }
52  }
53

A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame

Popular Tags