001: /*
002: * $Id: MemoryDatabase.java,v 1.9 2004/09/09 23:47:45 ahimanikya Exp $
003: * =======================================================================
004: * Copyright (c) 2002 Axion Development Team. All rights reserved.
005: *
006: * Redistribution and use in source and binary forms, with or without
007: * modification, are permitted provided that the following conditions
008: * are met:
009: *
010: * 1. Redistributions of source code must retain the above
011: * copyright notice, this list of conditions and the following
012: * disclaimer.
013: *
014: * 2. Redistributions in binary form must reproduce the above copyright
015: * notice, this list of conditions and the following disclaimer in
016: * the documentation and/or other materials provided with the
017: * distribution.
018: *
019: * 3. The names "Tigris", "Axion", nor the names of its contributors may
020: * not be used to endorse or promote products derived from this
021: * software without specific prior written permission.
022: *
023: * 4. Products derived from this software may not be called "Axion", nor
024: * may "Tigris" or "Axion" appear in their names without specific prior
025: * written permission.
026: *
027: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
028: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
029: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
030: * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
031: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
032: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
033: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
034: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
035: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
036: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
037: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
038: * =======================================================================
039: */
040:
041: package org.axiondb.engine;
042:
043: import java.io.File;
044: import java.util.Properties;
045:
046: import org.axiondb.AxionException;
047: import org.axiondb.Table;
048: import org.axiondb.TableFactory;
049: import org.axiondb.engine.tables.MemoryTable;
050:
051: /**
052: * A memory-resident {@link org.axiondb.Database}.
053: *
054: * @version $Revision: 1.9 $ $Date: 2004/09/09 23:47:45 $
055: * @author Chuck Burdick
056: * @author Rodney Waldhoff
057: * @author Morgan Delagrange
058: */
059: public class MemoryDatabase extends BaseDatabase {
060:
061: //------------------------------------------------------------- Constructors
062:
063: public MemoryDatabase() throws AxionException {
064: this (null, null);
065: }
066:
067: public MemoryDatabase(String name) throws AxionException {
068: this (name, null);
069: }
070:
071: public MemoryDatabase(String name, Properties props)
072: throws AxionException {
073: super (name);
074: createMetaDataTables();
075: if (null != props) {
076: loadProperties(props);
077: } else {
078: loadProperties(getBaseProperties());
079: }
080: }
081:
082: public TableFactory getTableFactory(String name) {
083: if (null == name || "default".equals(name)) {
084: return DEFAULT_TABLE_FACTORY;
085: }
086: return super .getTableFactory(name);
087: }
088:
089: public File getDBDirectory() {
090: return null;
091: }
092:
093: protected Table createSystemTable(String name) {
094: return new MemoryTable(name, Table.SYSTEM_TABLE_TYPE);
095: }
096:
097: //-------------------------------------------------------------- Attributes
098:
099: private static final TableFactory DEFAULT_TABLE_FACTORY = new MemoryTableFactory();
100: }
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