cvs commit: jakarta-turbine-torque/src/java/org/apache/torque/oid IDGeneratorFactory.java

[dl...@apache.org]

dlr         01/08/13 15:27:22

  Added:       src/java/org/apache/torque/oid IDGeneratorFactory.java
  Log:
  Factory to instantiate IdGenerator implementations by ID method name.
  
  Revision  Changes    Path
  1.1                  jakarta-turbine-torque/src/java/org/apache/torque/oid/IDGeneratorFactory.java
  
  Index: IDGeneratorFactory.java
  ===================================================================
  package org.apache.torque.oid;
  
  /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2001 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software itself,
   *    if and wherever such third-party acknowledgments normally appear.
   *
   * 4. The names "Apache" and "Apache Software Foundation" and
   *    "Apache Turbine" must not be used to endorse or promote products
   *    derived from this software without prior written permission. For
   *    written permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    "Apache Turbine", nor may "Apache" appear in their name, without
   *    prior written permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  
  import org.apache.torque.adapter.DB;
  import org.apache.torque.adapter.IDMethod;
  
  /**
   * A factory which instantiates {@link
   * org.apache.torque.oid.IdGenerator} implementations.
   *
   * @author <a href="mailto:dlr@collab.net">Daniel Rall</a>
   * @version $Id: IDGeneratorFactory.java,v 1.1 2001/08/13 22:27:22 dlr Exp $
   */
  public class IDGeneratorFactory
  {
      /**
       * The list of ID generation method types which have associated
       * {@link org.apache.torque.oid.IdGenerator} implementations.
       */
      public static final String[] ID_GENERATOR_METHODS =
      {
          IDMethod.NATIVE, IDMethod.AUTO_INCREMENT, IDMethod.SEQUENCE
      };
  
      /**
       * Factory method which instantiates {@link
       * org.apache.torque.oid.IdGenerator} implementations based on the
       * return value of the provided adapter's {@link
       * org.apache.torque.adapter.DB#getIDMethodType()} method.
       * Returns <code>null</code> for unknown types.
       *
       * @param dbAdapter The type of adapter to create an ID generator
       * for.
       * @return The appropriate ID generator (possibly
       * <code>null</code>).
       */
      public static IdGenerator create(DB dbAdapter)
      {
          String idMethod = dbAdapter.getIDMethodType();
          if (IDMethod.AUTO_INCREMENT.equals(idMethod))
          {
              return new AutoIncrementIdGenerator(dbAdapter);
          }
          else if (IDMethod.SEQUENCE.equals(idMethod))
          {
              return new SequenceIdGenerator(dbAdapter);
          }
          else
          {
              return null;
          }
      }
  }
  
  
  

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