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1   /*
2    * $Id$
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  
22  package org.apache.struts2.osgi.loaders;
23  
24  import java.io.InputStream;
25  
26  import org.apache.struts2.osgi.DefaultBundleAccessor;
27  import org.apache.velocity.exception.ResourceNotFoundException;
28  import org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader;
29  
30  /***
31   * Finds Velocity templates in bundles
32   */
33  public class VelocityBundleResourceLoader extends ClasspathResourceLoader {
34  
35      public synchronized InputStream getResourceStream(String name)
36              throws ResourceNotFoundException {
37          if ((name == null) || (name.length() == 0)) {
38              throw new ResourceNotFoundException("No template name provided");
39          }
40  
41          if (name.startsWith("/")) {
42              name = name.substring(1);
43          }
44  
45          try {
46              return DefaultBundleAccessor.getInstance().loadResourceAsStream(name);
47          } catch (Exception e) {
48              throw new ResourceNotFoundException(e.getMessage());
49          }
50      }
51  }