001    package org.apache.ojb.broker.accesslayer;
002    
003    /* Copyright 2003-2005 The Apache Software Foundation
004     *
005     * Licensed under the Apache License, Version 2.0 (the "License");
006     * you may not use this file except in compliance with the License.
007     * You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    
018    import org.apache.ojb.broker.util.factory.ConfigurableFactory;
019    import org.apache.ojb.broker.metadata.ClassDescriptor;
020    import org.apache.ojb.broker.metadata.JdbcConnectionDescriptor;
021    
022    /**
023     * Factory for {@link org.apache.ojb.broker.accesslayer.StatementsForClassIF}
024     * implementations. Developers may specify the specific implementation returned by
025     * {@link #getStatementsForClass} by implementing the
026     * {@link org.apache.ojb.broker.accesslayer.StatementsForClassIF}
027     * interface and setting the <code>StatementsForClassClass</code> property in
028     * <code>OJB.properties</code>.
029     * <br/>
030     * @see org.apache.ojb.broker.accesslayer.StatementManager
031     * @see org.apache.ojb.broker.accesslayer.StatementsForClassImpl
032     * @author <a href="mailto:rburt3@mchsi.com">Randall Burt</a>
033     * @version $Id: StatementsForClassFactory.java,v 1.1 2007-08-24 22:17:30 ewestfal Exp $
034     */
035    
036    public class StatementsForClassFactory extends ConfigurableFactory
037    {
038            private static StatementsForClassFactory singleton;
039    
040    
041            /**
042             * Get the singleton instance of this class
043         * @return the singleton instance of StatementsForClassFactory
044         */
045        public static synchronized StatementsForClassFactory getInstance()
046            {
047                    if (singleton == null)
048                    {
049                            singleton = new StatementsForClassFactory();
050                    }
051                    return singleton;
052            }
053    
054        /*
055         * @see org.apache.ojb.broker.util.factory.ConfigurableFactory#getConfigurationKey()
056         */
057        protected String getConfigurationKey()
058        {
059            return "StatementsForClassClass";
060        }
061    
062    
063        /**
064         * Get an instance of {@link org.apache.ojb.broker.accesslayer.StatementsForClassIF}
065         * @param cds our connection descriptor
066         * @param cld the class descriptor of the persistant object
067         * @return an instance of {@link org.apache.ojb.broker.accesslayer.StatementsForClassIF}
068         */
069        public StatementsForClassIF getStatementsForClass(JdbcConnectionDescriptor cds, ClassDescriptor cld)
070        {
071                    return (StatementsForClassIF) this.createNewInstance(new Class[]{JdbcConnectionDescriptor.class, ClassDescriptor.class},
072                                                                         new Object[]{cds, cld});
073        }
074    }