Source Code Cross Referenced for Provider.java in  » Database-DBMS » JDBM » jdbm » recman » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » JDBM » jdbm.recman 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * JDBM LICENSE v1.00
003:         *
004:         * Redistribution and use of this software and associated documentation
005:         * ("Software"), with or without modification, are permitted provided
006:         * that the following conditions are met:
007:         *
008:         * 1. Redistributions of source code must retain copyright
009:         *    statements and notices.  Redistributions must also contain a
010:         *    copy of this document.
011:         *
012:         * 2. Redistributions in binary form must reproduce the
013:         *    above copyright notice, this list of conditions and the
014:         *    following disclaimer in the documentation and/or other
015:         *    materials provided with the distribution.
016:         *
017:         * 3. The name "JDBM" must not be used to endorse or promote
018:         *    products derived from this Software without prior written
019:         *    permission of Cees de Groot.  For written permission,
020:         *    please contact cg@cdegroot.com.
021:         *
022:         * 4. Products derived from this Software may not be called "JDBM"
023:         *    nor may "JDBM" appear in their names without prior written
024:         *    permission of Cees de Groot.
025:         *
026:         * 5. Due credit should be given to the JDBM Project
027:         *    (http://jdbm.sourceforge.net/).
028:         *
029:         * THIS SOFTWARE IS PROVIDED BY THE JDBM PROJECT AND CONTRIBUTORS
030:         * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
031:         * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
032:         * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
033:         * CEES DE GROOT OR ANY CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
034:         * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
035:         * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
036:         * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
037:         * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
038:         * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
039:         * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
040:         * OF THE POSSIBILITY OF SUCH DAMAGE.
041:         *
042:         * Copyright 2000 (C) Cees de Groot. All Rights Reserved.
043:         * Copyright 2000-2001 (C) Alex Boisvert. All Rights Reserved.
044:         * Contributions are Copyright (C) 2000 by their associated contributors.
045:         *
046:         * $Id: Provider.java,v 1.3 2005/06/25 23:12:32 doomdark Exp $
047:         */package jdbm.recman;
048:
049:        import java.io.IOException;
050:        import java.util.Properties;
051:
052:        import jdbm.RecordManager;
053:        import jdbm.RecordManagerOptions;
054:        import jdbm.RecordManagerProvider;
055:
056:        import jdbm.helper.MRU;
057:
058:        /**
059:         * Provider of the default RecordManager implementation.
060:         *
061:         * @author <a href="mailto:boisvert@intalio.com">Alex Boisvert</a>
062:         * @version $Id: Provider.java,v 1.3 2005/06/25 23:12:32 doomdark Exp $
063:         */
064:        public final class Provider implements  RecordManagerProvider {
065:
066:            /**
067:             * Create a default implementation record manager.
068:             *
069:             * @param name Name of the record file.
070:             * @param options Record manager options.
071:             * @throws IOException if an I/O related exception occurs while creating
072:             *                    or opening the record manager.
073:             * @throws UnsupportedOperationException if some options are not supported by the
074:             *                                      implementation.
075:             * @throws IllegalArgumentException if some options are invalid.
076:             */
077:            public RecordManager createRecordManager(String name,
078:                    Properties options) throws IOException {
079:                RecordManager recman;
080:                String value;
081:                int cacheSize;
082:
083:                recman = new BaseRecordManager(name);
084:
085:                value = options.getProperty(
086:                        RecordManagerOptions.DISABLE_TRANSACTIONS, "false");
087:                if (value.equalsIgnoreCase("TRUE")) {
088:                    ((BaseRecordManager) recman).disableTransactions();
089:                }
090:
091:                value = options.getProperty(RecordManagerOptions.CACHE_SIZE,
092:                        "1000");
093:                cacheSize = Integer.parseInt(value);
094:
095:                value = options.getProperty(RecordManagerOptions.CACHE_TYPE,
096:                        RecordManagerOptions.NORMAL_CACHE);
097:                if (value.equalsIgnoreCase(RecordManagerOptions.NORMAL_CACHE)) {
098:                    MRU cache = new MRU(cacheSize);
099:                    recman = new CacheRecordManager(recman, cache);
100:                } else if (value
101:                        .equalsIgnoreCase(RecordManagerOptions.SOFT_REF_CACHE)) {
102:                    throw new IllegalArgumentException(
103:                            "Soft reference cache not implemented");
104:                } else if (value
105:                        .equalsIgnoreCase(RecordManagerOptions.WEAK_REF_CACHE)) {
106:                    throw new IllegalArgumentException(
107:                            "Weak reference cache not implemented");
108:                } else {
109:                    throw new IllegalArgumentException("Invalid cache type: "
110:                            + value);
111:                }
112:
113:                return recman;
114:            }
115:
116:        }
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