    001    /* ========================================================================
    002     * JCommon : a free general purpose class library for the Java(tm) platform
    003     * ========================================================================
    004     *
    005     * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
    006     *
    007     * Project Info:  http://www.jfree.org/jcommon/index.html
    008     *
    009     * This library is free software; you can redistribute it and/or modify it
    010     * under the terms of the GNU Lesser General Public License as published by
    011     * the Free Software Foundation; either version 2.1 of the License, or
    012     * (at your option) any later version.
    013     *
    014     * This library is distributed in the hope that it will be useful, but
    015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
    017     * License for more details.
    018     *
    019     * You should have received a copy of the GNU Lesser General Public
    020     * License along with this library; if not, write to the Free Software
    021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
    022     * USA.
    023     *
    024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
    025     * in the United States and other countries.]
    026     *
    027     * ------------------------
    028     * SimpleObjectFactory.java
    029     * ------------------------
    030     * (C)opyright 2003-2005, by Thomas Morgner and Contributors.
    031     *
    032     * Original Author:  Thomas Morgner;
    033     * Contributor(s):   David Gilbert (for Object Refinery Limited);
    034     *
    035     * $Id: SimpleObjectFactory.java,v 1.3 2005/10/18 13:33:53 mungady Exp $
    036     *
    037     * Changes
    038     * -------
    039     * 02-Dec-2003 : Initial version
    040     *
    041     */
    042
    043    package org.jfree.xml.util;
    044
    045    import java.util.HashMap;
    046
    047    /**
    048     * A simple object factory.
    049     */
    050    public class SimpleObjectFactory implements ObjectFactory {
    051
    052        /** The object mappings. */
    053        private HashMap objectMappings;
    054
    055        /** The manual object mappings. */
    056        private HashMap manualMappings;
    057
    058        /** The multiplex mappings. */
    059        private HashMap multiplexMappings;
    060
    061        /**
    062         * Creates a new instance.
    063         */
    064        public SimpleObjectFactory() {
    065            this.objectMappings = new HashMap();
    066            this.manualMappings = new HashMap();
    067            this.multiplexMappings = new HashMap();
    068        }
    069
    070        /**
    071         * Adds a manual mapping.
    072         *
    073         * @param mapping  the mapping.
    074         */
    075        public void addManualMapping(final ManualMappingDefinition mapping) {
    076            this.manualMappings.put(mapping.getBaseClass(), mapping);
    077        }
    078
    079        /**
    080         * Adds a generic handler.
    081         *
    082         * @param handler  the handler.
    083         */
    084        public void addGenericHandler(final GenericObjectFactory handler) {
    085            this.objectMappings.put(handler.getBaseClass(), handler);
    086        }
    087
    088        /**
    089         * Adds a multiplex mapping.
    090         *
    091         * @param mplex  the multiplex mapping.
    092         */
    093        public void addMultiplexMapping(final MultiplexMappingDefinition mplex) {
    094            this.multiplexMappings.put(mplex.getBaseClass(), mplex);
    095        }
    096
    097        /**
    098         * Clears the mappings.
    099         */
    100        public void clear() {
    101            this.objectMappings.clear();
    102            this.manualMappings.clear();
    103            this.multiplexMappings.clear();
    104        }
    105
    106        /**
    107         * Returns a factory instance for the given class. The factory is independent
    108         * from all previously generated instances.
    109         *
    110         * @param c the class
    111         * @return the object factory.
    112         */
    113        public GenericObjectFactory getFactoryForClass(final Class c) {
    114            final GenericObjectFactory factory = (GenericObjectFactory) this.objectMappings.get(c);
    115            if (factory == null) {
    116                return null;
    117            }
    118            return factory.getInstance();
    119        }
    120
    121        /**
    122         * Returns the manual mapping definition for the given class, or null, if
    123         * not manual definition exists.
    124         *
    125         * @param c the class for which to check the existence of the definition
    126         * @return the manual mapping definition or null.
    127         */
    128        public ManualMappingDefinition getManualMappingDefinition(final Class c) {
    129            return (ManualMappingDefinition) this.manualMappings.get(c);
    130        }
    131
    132        /**
    133         * Returns the multiplex definition for the given class, or null, if no
    134         * such definition exists.
    135         *
    136         * @param c the class for which to check the existence of the multiplexer
    137         * @return the multiplexer for the class, or null if no multiplexer exists.
    138         */
    139        public MultiplexMappingDefinition getMultiplexDefinition(final Class c) {
    140            final MultiplexMappingDefinition definition = (MultiplexMappingDefinition)
    141            this.multiplexMappings.get(c);
    142            return definition;
    143        }
    144
    145        /**
    146         * Checks, whether a generic handler exists for the given class. This does
    147         * not check, whether an mapping exists.
    148         *
    149         * @param c the class for which to check
    150         * @return true, if an generic handler is defined, false otherwise.
    151         */
    152        public boolean isGenericHandler(final Class c) {
    153            return this.objectMappings.containsKey(c);
    154        }
    155    }