001    /*
002     $Id: PropertyModel.java,v 1.1 2003/10/24 12:47:15 jstrachan Exp $
003    
004     Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
005    
006     Redistribution and use of this software and associated documentation
007     ("Software"), with or without modification, are permitted provided
008     that the following conditions are met:
009    
010     1. Redistributions of source code must retain copyright
011        statements and notices.  Redistributions must also contain a
012        copy of this document.
013    
014     2. Redistributions in binary form must reproduce the
015        above copyright notice, this list of conditions and the
016        following disclaimer in the documentation and/or other
017        materials provided with the distribution.
018    
019     3. The name "groovy" must not be used to endorse or promote
020        products derived from this Software without prior written
021        permission of The Codehaus.  For written permission,
022        please contact info@codehaus.org.
023    
024     4. Products derived from this Software may not be called "groovy"
025        nor may "groovy" appear in their names without prior written
026        permission of The Codehaus. "groovy" is a registered
027        trademark of The Codehaus.
028    
029     5. Due credit should be given to The Codehaus -
030        http://groovy.codehaus.org/
031    
032     THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
033     ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
034     NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
035     FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
036     THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
037     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
038     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
039     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
040     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
041     STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
042     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
043     OF THE POSSIBILITY OF SUCH DAMAGE.
044    
045     */
046    package groovy.model;
047    
048    import org.codehaus.groovy.runtime.InvokerHelper;
049    
050    /**
051     * Represents a property of a value as a model.
052     * 
053     * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
054     * @version $Revision: 1.1 $
055     */
056    public class PropertyModel implements ValueModel, NestedValueModel {
057    
058        private ValueModel sourceModel;
059        private String property;
060        private Class type;
061    
062        public PropertyModel(ValueModel sourceModel, String property) {
063            this(sourceModel, property, Object.class);
064        }
065    
066        public PropertyModel(ValueModel sourceModel, String property, Class type) {
067            this.sourceModel = sourceModel;
068            this.property = property;
069            this.type = type;
070        }
071    
072        public String getProperty() {
073            return property;
074        }
075    
076        public ValueModel getSourceModel() {
077            return sourceModel;
078        }
079    
080        public Object getValue() {
081            Object source = sourceModel.getValue();
082            if (source != null) {
083                return InvokerHelper.getProperty(source, property);
084            }
085            return null;
086        }
087    
088        public void setValue(Object value) {
089            Object source = sourceModel.getValue();
090            if (source != null) {
091                InvokerHelper.setProperty(source, property, value);
092            }
093        }
094        
095        public Class getType() {
096            return type;
097        }
098    
099        public boolean isEditable() {
100            /** @todo implement this! */
101            return true;
102        }
103    
104    }