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1   /**
2    * JDBM LICENSE v1.00
3    *
4    * Redistribution and use of this software and associated documentation
5    * ("Software"), with or without modification, are permitted provided
6    * that the following conditions are met:
7    *
8    * 1. Redistributions of source code must retain copyright
9    *    statements and notices.  Redistributions must also contain a
10   *    copy of this document.
11   *
12   * 2. Redistributions in binary form must reproduce the
13   *    above copyright notice, this list of conditions and the
14   *    following disclaimer in the documentation and/or other
15   *    materials provided with the distribution.
16   *
17   * 3. The name "JDBM" must not be used to endorse or promote
18   *    products derived from this Software without prior written
19   *    permission of Cees de Groot.  For written permission,
20   *    please contact cg@cdegroot.com.
21   *
22   * 4. Products derived from this Software may not be called "JDBM"
23   *    nor may "JDBM" appear in their names without prior written
24   *    permission of Cees de Groot.
25   *
26   * 5. Due credit should be given to the JDBM Project
27   *    (http://jdbm.sourceforge.net/).
28   *
29   * THIS SOFTWARE IS PROVIDED BY THE JDBM PROJECT AND CONTRIBUTORS
30   * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
31   * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
32   * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
33   * CEES DE GROOT OR ANY CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
34   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
35   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
36   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
38   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
40   * OF THE POSSIBILITY OF SUCH DAMAGE.
41   *
42   * Copyright 2000 (C) Cees de Groot. All Rights Reserved.
43   * Copyright 2000-2001 (C) Alex Boisvert. All Rights Reserved.
44   * Contributions are Copyright (C) 2000 by their associated contributors.
45   *
46   * $Id: Provider.java,v 1.3 2005/06/25 23:12:32 doomdark Exp $
47   */
48  
49  package jdbm.recman;
50  
51  import java.io.IOException;
52  import java.util.Properties;
53  
54  import jdbm.RecordManager;
55  import jdbm.RecordManagerOptions;
56  import jdbm.RecordManagerProvider;
57  
58  import jdbm.helper.MRU;
59  
60  /**
61   * Provider of the default RecordManager implementation.
62   *
63   * @author <a href="mailto:boisvert@intalio.com">Alex Boisvert</a>
64   * @version $Id: Provider.java,v 1.3 2005/06/25 23:12:32 doomdark Exp $
65   */
66  public final class Provider
67      implements RecordManagerProvider
68  {
69  
70      /**
71       * Create a default implementation record manager.
72       *
73       * @param name Name of the record file.
74       * @param options Record manager options.
75       * @throws IOException if an I/O related exception occurs while creating
76       *                    or opening the record manager.
77       * @throws UnsupportedOperationException if some options are not supported by the
78       *                                      implementation.
79       * @throws IllegalArgumentException if some options are invalid.
80       */
81      public RecordManager createRecordManager( String name,
82                                                Properties options )
83          throws IOException
84      {
85          RecordManager  recman;
86          String         value;
87          int            cacheSize;
88  
89          recman = new BaseRecordManager( name );
90  
91          value = options.getProperty( RecordManagerOptions.DISABLE_TRANSACTIONS, "false" );
92          if ( value.equalsIgnoreCase( "TRUE" ) ) {
93              ( (BaseRecordManager) recman ).disableTransactions();
94          }
95  
96          value = options.getProperty( RecordManagerOptions.CACHE_SIZE, "1000" );
97          cacheSize = Integer.parseInt( value );
98  
99          value = options.getProperty( RecordManagerOptions.CACHE_TYPE,
100                                      RecordManagerOptions.NORMAL_CACHE );
101         if ( value.equalsIgnoreCase( RecordManagerOptions.NORMAL_CACHE ) ) {
102             MRU cache = new MRU( cacheSize );
103             recman = new CacheRecordManager( recman, cache );
104         } else if ( value.equalsIgnoreCase( RecordManagerOptions.SOFT_REF_CACHE ) ) {
105             throw new IllegalArgumentException( "Soft reference cache not implemented" );
106         } else if ( value.equalsIgnoreCase( RecordManagerOptions.WEAK_REF_CACHE ) ) {
107             throw new IllegalArgumentException( "Weak reference cache not implemented" );
108         } else {
109             throw new IllegalArgumentException( "Invalid cache type: " + value );
110         }
111 
112         return recman;
113     }
114 
115 
116 }