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1   package org.codehaus.plexus.compiler.eclipse;
2   
3   /**
4    * The MIT License
5    *
6    * Copyright (c) 2005, The Codehaus
7    *
8    * Permission is hereby granted, free of charge, to any person obtaining a copy of
9    * this software and associated documentation files (the "Software"), to deal in
10   * the Software without restriction, including without limitation the rights to
11   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
12   * of the Software, and to permit persons to whom the Software is furnished to do
13   * so, subject to the following conditions:
14   *
15   * The above copyright notice and this permission notice shall be included in all
16   * copies or substantial portions of the Software.
17   *
18   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24   * SOFTWARE.
25   */
26  
27  import java.util.List;
28  import java.util.Map;
29  import java.util.HashMap;
30  import java.io.File;
31  
32  /**
33   * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>
34   */
35  public class SourceCodeLocator
36  {
37      private List<String> sourceRoots;
38  
39      private Map<String, File> cache;
40  
41      public SourceCodeLocator( List<String> sourceRoots )
42      {
43          this.sourceRoots = sourceRoots;
44  
45          cache = new HashMap<String, File>();
46      }
47  
48      public File findSourceCodeForClass( String className )
49      {
50          File f = cache.get( className );
51  
52          if ( f != null )
53          {
54              return f;
55          }
56  
57          String sourceName = className.replace( '.', System.getProperty( "file.separator" ).charAt( 0 ) );
58  
59          sourceName += ".java";
60  
61          f = findInRoots( sourceName );
62  
63          cache.put( className, f );
64  
65          return f;
66      }
67  
68      private File findInRoots( String s )
69      {
70          for ( String root : sourceRoots )
71          {
72              File f = new File( root, s );
73  
74              if ( f.exists() )
75              {
76                  return f;
77              }
78          }
79  
80          return null;
81      }
82  }