ResourceURLFactory


1   /*
2    * Copyright 1999-2004 The Apache Software Foundation.
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.apache.cocoon.components.url;
17  
18  import org.apache.avalon.framework.context.Context;
19  import org.apache.avalon.framework.context.ContextException;
20  import org.apache.avalon.framework.context.Contextualizable;
21  import org.apache.avalon.framework.logger.AbstractLogEnabled;
22  
23  import org.apache.cocoon.util.ClassUtils;
24  
25  import java.net.MalformedURLException  ;
26  import java.net.URL  ;
27  
28  /**
29   * @deprecated by the new source resolving of avalon excalibur
30   *
31   * @author <a HREF="mailto:giacomo@apache.org">Giacomo Pati</a>
32   * @version CVS $Id: ResourceURLFactory.java 30932 2004-07-29 17:35:38Z vgritsenko $
33   */
34  public class ResourceURLFactory extends AbstractLogEnabled implements URLFactory, Contextualizable {
35  
36      /**
37       * The context
38       */
39      protected Context context;
40  
41      /**
42       * Create a URL from a location. This method supports the
43       * <i>resource://</i> pseudo-protocol for loading resources
44       * accessible to this same class' <code>ClassLoader</code>
45       *
46       * @param location The location
47       * @return The URL pointed to by the location
48       * @exception MalformedURLException If the location is malformed
49       */
50      public URL   getURL(String   location) throws MalformedURLException   {
51          URL   u = ClassUtils.getResource(location);
52          if (u != null)
53              return u;
54          else {
55              getLogger().error(location + " could not be found. (possible classloader problem)");
56              throw new RuntimeException  (location + " could not be found. (possible classloader problem)");
57          }
58      }
59  
60      public URL   getURL(URL   base, String   location) throws MalformedURLException   {
61          return getURL (base.toExternalForm() + location);
62      }
63  
64      /**
65       * Get the context
66       */
67      public void contextualize(Context context) throws ContextException {
68          if (this.context == null) {
69              this.context = context;
70          }
71      }
72  }
73
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