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1 package org.apache.torque.oid; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache Turbine" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * "Apache Turbine", nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>. 55 */ 56 57 import org.apache.torque.adapter.DB; 58 import org.apache.torque.adapter.IDMethod; 59 60 /*** 61 * A factory which instantiates {@link 62 * org.apache.torque.oid.IdGenerator} implementations. 63 * 64 * @author <a href="mailto:dlr@collab.net">Daniel Rall</a> 65 * @version $Id: IDGeneratorFactory.java,v 1.2 2002/11/26 23:46:56 mpoeschl Exp $ 66 */ 67 public class IDGeneratorFactory 68 { 69 /*** 70 * The list of ID generation method types which have associated 71 * {@link org.apache.torque.oid.IdGenerator} implementations. 72 */ 73 public static final String[] ID_GENERATOR_METHODS = 74 { 75 IDMethod.NATIVE, IDMethod.AUTO_INCREMENT, IDMethod.SEQUENCE 76 }; 77 78 /*** 79 * Factory method which instantiates {@link 80 * org.apache.torque.oid.IdGenerator} implementations based on the 81 * return value of the provided adapter's {@link 82 * org.apache.torque.adapter.DB#getIDMethodType()} method. 83 * Returns <code>null</code> for unknown types. 84 * 85 * @param dbAdapter The type of adapter to create an ID generator for. 86 * @return The appropriate ID generator (possibly <code>null</code>). 87 */ 88 public static IdGenerator create(DB dbAdapter) 89 { 90 String idMethod = dbAdapter.getIDMethodType(); 91 if (IDMethod.AUTO_INCREMENT.equals(idMethod)) 92 { 93 return new AutoIncrementIdGenerator(dbAdapter); 94 } 95 else if (IDMethod.SEQUENCE.equals(idMethod)) 96 { 97 return new SequenceIdGenerator(dbAdapter); 98 } 99 else 100 { 101 return null; 102 } 103 } 104 }

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