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1   package org.apache.maven.shared.io.location;
2   
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  import java.net.URL;
23  
24  import org.apache.maven.shared.io.logging.MessageHolder;
25  
26  public class ClasspathResourceLocatorStrategy
27      implements LocatorStrategy
28  {
29  
30      private String tempFilePrefix = "location.";
31  
32      private String tempFileSuffix = ".cpurl";
33  
34      private boolean tempFileDeleteOnExit = true;
35  
36      public ClasspathResourceLocatorStrategy()
37      {
38      }
39  
40      public ClasspathResourceLocatorStrategy( String tempFilePrefix, String tempFileSuffix, boolean tempFileDeleteOnExit )
41      {
42          this.tempFilePrefix = tempFilePrefix;
43          this.tempFileSuffix = tempFileSuffix;
44          this.tempFileDeleteOnExit = tempFileDeleteOnExit;
45      }
46  
47      public Location resolve( String locationSpecification, MessageHolder messageHolder )
48      {
49          ClassLoader cloader = Thread.currentThread().getContextClassLoader();
50  
51          URL resource = cloader.getResource( locationSpecification );
52  
53          Location location = null;
54  
55          if ( resource != null )
56          {
57              location = new URLLocation( resource, locationSpecification, tempFilePrefix, tempFileSuffix,
58                                          tempFileDeleteOnExit );
59          }
60          else
61          {
62              messageHolder.addMessage( "Failed to resolve classpath resource: " + locationSpecification
63                  + " from classloader: " + cloader );
64          }
65  
66          return location;
67      }
68  
69  }