DirMetaDataReader


1   /*
2    * @(#)DirMetaDataReader.java
3    *
4    * Copyright (C) 2002-2003 Matt Albrecht
5    * groboclown@users.sourceforge.net
6    * http://groboutils.sourceforge.net
7    *
8    *  Permission is hereby granted, free of charge, to any person obtaining a
9    *  copy of this software and associated documentation files (the "Software"),
10   *  to deal in the Software without restriction, including without limitation
11   *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
12   *  and/or sell copies of the Software, and to permit persons to whom the
13   *  Software is furnished to do so, subject to the following conditions:
14   *
15   *  The above copyright notice and this permission notice shall be included in
16   *  all 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
21   *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22   *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23   *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24   *  DEALINGS IN THE SOFTWARE.
25   */
26  
27  package net.sourceforge.groboutils.codecoverage.v2.datastore;
28  
29  import java.io.File  ;
30  import java.io.IOException  ;
31  
32  import net.sourceforge.groboutils.codecoverage.v2.IAnalysisModule;
33  
34  
35  /**
36   * Knows how to read the meta-data in a repository.
37   *
38   * @author    Matt Albrecht <a HREF="mailto:groboclown@users.sourceforge.net">groboclown@users.sourceforge.net</a>
39   * @version   $Date: 2004/04/15 05:48:26 $
40   * @since     December 15, 2002
41   */
42  public class DirMetaDataReader implements IMetaDataReader
43  {
44      private DirMetaDataIO store;
45      
46      
47      /**
48       * Creates a meta-data writer for a specific directory.  This directory
49       * should be dedicated to just this writer.
50       */
51      public DirMetaDataReader( File   basedir )
52              throws IOException  
53      {
54          if (basedir == null)
55          {
56              throw new IllegalArgumentException  ( "No null args." );
57          }
58          this.store = new DirMetaDataIO( basedir );
59      }
60      
61      
62      /**
63       * Returns a mark meta-data reader for a specific class signature.
64       */
65      public IClassMetaDataReader getClassReader( IAnalysisModule module )
66              throws IOException  
67      {
68          if (module == null)
69          {
70              throw new IllegalArgumentException  ("no null args");
71          }
72          checkClose();
73          
74          // check if the module exists?
75          
76          return new DirClassMetaDataReader( module, this.store );
77      }
78      
79      
80      /**
81       * Returns the list of all known modules at the time of recording.
82       */
83      public AnalysisModuleSet getAnalysisModuleSet()
84              throws IOException  
85      {
86          checkClose();
87          
88          return this.store.getAnalysisModuleSet();
89      }
90      
91      
92      /**
93       * Closes this reader to prevent further access.
94       */
95      public void close()
96              throws IOException  
97      {
98          checkClose();
99          this.store.close();
100         this.store = null;
101     }
102     
103     
104     private void checkClose()
105             throws IOException  
106     {
107         if (this.store == null)
108         {
109             throw new IOException  ( "Writer has already been closed." );
110         }
111     }
112     
113     
114     protected void finalize() throws Throwable  
115     {
116         Exception   ex = null;
117         if (this.store != null)
118         {
119             ex = new IllegalStateException  ("Did not close writer.");
120         }
121         
122         super.finalize();
123         
124         // class-based post condition
125         if (ex != null)
126         {
127             throw ex;
128         }
129     }
130 }
131 
132
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