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Java > Open Source Codes > org > jfree > xml > util > SimpleObjectFactory


1 /* ========================================================================
2  * JCommon : a free general purpose class library for the Java(tm) platform
3  * ========================================================================
4  *
5  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
6  *
7  * Project Info: http://www.jfree.org/jcommon/index.html
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22  * USA.
23  *
24  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * ------------------------
28  * SimpleObjectFactory.java
29  * ------------------------
30  * (C)opyright 2003-2005, by Thomas Morgner and Contributors.
31  *
32  * Original Author: Thomas Morgner;
33  * Contributor(s): David Gilbert (for Object Refinery Limited);
34  *
35  * $Id: SimpleObjectFactory.java,v 1.3 2005/10/18 13:33:53 mungady Exp $
36  *
37  * Changes
38  * -------
39  * 02-Dec-2003 : Initial version
40  *
41  */
42
43 package org.jfree.xml.util;
44
45 import java.util.HashMap JavaDoc;
46
47 /**
48  * A simple object factory.
49  */
50 public class SimpleObjectFactory implements ObjectFactory {
51
52     /** The object mappings. */
53     private HashMap JavaDoc objectMappings;
54     
55     /** The manual object mappings. */
56     private HashMap JavaDoc manualMappings;
57     
58     /** The multiplex mappings. */
59     private HashMap JavaDoc multiplexMappings;
60
61     /**
62      * Creates a new instance.
63      */
64     public SimpleObjectFactory() {
65         this.objectMappings = new HashMap JavaDoc();
66         this.manualMappings = new HashMap JavaDoc();
67         this.multiplexMappings = new HashMap JavaDoc();
68     }
69
70     /**
71      * Adds a manual mapping.
72      *
73      * @param mapping the mapping.
74      */
75     public void addManualMapping(final ManualMappingDefinition mapping) {
76         this.manualMappings.put(mapping.getBaseClass(), mapping);
77     }
78
79     /**
80      * Adds a generic handler.
81      *
82      * @param handler the handler.
83      */
84     public void addGenericHandler(final GenericObjectFactory handler) {
85         this.objectMappings.put(handler.getBaseClass(), handler);
86     }
87
88     /**
89      * Adds a multiplex mapping.
90      *
91      * @param mplex the multiplex mapping.
92      */
93     public void addMultiplexMapping(final MultiplexMappingDefinition mplex) {
94         this.multiplexMappings.put(mplex.getBaseClass(), mplex);
95     }
96
97     /**
98      * Clears the mappings.
99      */
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 JavaDoc 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 JavaDoc 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 JavaDoc 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 JavaDoc c) {
153         return this.objectMappings.containsKey(c);
154     }
155 }
156
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