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EnvironmentScopeMap xref
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1   /*
2    * $Id: EnvironmentScopeMap.java 942404 2010-05-08 15:36:51Z apetrelli $
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   * http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  package org.apache.tiles.request.freemarker;
22  
23  import java.util.Set;
24  
25  import org.apache.tiles.request.collection.ScopeMap;
26  import org.apache.tiles.request.freemarker.extractor.EnvironmentScopeExtractor;
27  
28  import freemarker.core.Environment;
29  import freemarker.template.TemplateModelException;
30  
31  /**
32   * <p>
33   * Private implementation of <code>Map</code> for servlet request attributes.
34   * </p>
35   *
36   * @version $Rev: 942404 $ $Date: 2010-05-09 01:36:51 +1000 (Sun, 09 May 2010) $
37   */
38  
39  final class EnvironmentScopeMap extends ScopeMap {
40  
41      /**
42       * The request object to use.
43       */
44      private Environment request = null;
45  
46      /**
47       * Constructor.
48       *
49       * @param request The request object to use.
50       */
51      public EnvironmentScopeMap(Environment request) {
52          super(new EnvironmentScopeExtractor(request));
53          this.request = request;
54      }
55  
56      @SuppressWarnings("unchecked")
57      @Override
58      public Set<String> keySet() {
59          try {
60              return request.getKnownVariableNames();
61          } catch (TemplateModelException e) {
62              throw new FreemarkerRequestException(
63                      "Cannot get known variable names", e);
64          }
65      }
66  }