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 }