ContextURLFactory


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.ContextException;
19  import org.apache.avalon.framework.context.Contextualizable;
20  import org.apache.avalon.framework.logger.AbstractLogEnabled;
21  
22  import org.apache.cocoon.Constants;
23  import org.apache.cocoon.environment.Context;
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: ContextURLFactory.java 30932 2004-07-29 17:35:38Z vgritsenko $
33   */
34  public class ContextURLFactory extends AbstractLogEnabled implements URLFactory, Contextualizable {
35  
36      /**
37       * The context
38       */
39      protected org.apache.avalon.framework.context.Context context;
40  
41      /**
42       * Create a URL from a location. This method supports the
43       * <i>context://</i> pseudo-protocol for loading
44       * resources accessible from the context root path
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          Context envContext = null;
52          try {
53              envContext = (Context)this.context.get(Constants.CONTEXT_ENVIRONMENT_CONTEXT);
54          } catch (ContextException e){
55              getLogger().error("ContextException in getURL",e);
56          }
57          if (envContext == null) {
58              getLogger().warn("no environment-context in application context (making an absolute URL)");
59              return new URL  (location);
60          }
61          URL   u = envContext.getResource("/" + location);
62          if (u != null)
63              return u;
64          else {
65              getLogger().info(location + " could not be found. (possible context problem)");
66              throw new MalformedURLException  (location + " could not be found. (possible context problem)");
67          }
68      }
69  
70      public URL   getURL(URL   base, String   location) throws MalformedURLException   {
71          return getURL(base.toExternalForm() + location);
72      }
73  
74      /**
75       * Get the context
76       */
77      public void contextualize(org.apache.avalon.framework.context.Context context) throws ContextException {
78          if (this.context == null) {
79              this.context = context;
80          }
81      }
82  }
83
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