001    /*
002     * $Id: MetaProperty.java,v 1.2 2004/07/13 19:43:07 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 that the
008     * following conditions are met:
009     *  1. Redistributions of source code must retain copyright statements and
010     * notices. Redistributions must also contain a copy of this document.
011     *  2. Redistributions in binary form must reproduce the above copyright
012     * notice, this list of conditions and the following disclaimer in the
013     * documentation and/or other materials provided with the distribution.
014     *  3. The name "groovy" must not be used to endorse or promote products
015     * derived from this Software without prior written permission of The Codehaus.
016     * For written permission, please contact info@codehaus.org.
017     *  4. Products derived from this Software may not be called "groovy" nor may
018     * "groovy" appear in their names without prior written permission of The
019     * Codehaus. "groovy" is a registered trademark of The Codehaus.
020     *  5. Due credit should be given to The Codehaus - http://groovy.codehaus.org/
021     *
022     * THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS ``AS IS'' AND ANY
023     * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
024     * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
025     * DISCLAIMED. IN NO EVENT SHALL THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR
026     * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
027     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
028     * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
029     * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
030     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
031     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
032     * DAMAGE.
033     *
034     */
035    package groovy.lang;
036    
037    /**
038     * Represents a property on a bean which may have a getter and/or a setter
039     * 
040     * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
041     * @version $Revision: 1.2 $
042     */
043    public abstract class MetaProperty {
044    
045        protected String name;
046        protected Class type;
047    
048        public MetaProperty(String name, Class type) {
049            this.name = name;
050            this.type = type;
051        }
052    
053        /**
054         * @return the property of the given object
055         * @throws Exception if the property could not be evaluated
056         */
057        public abstract Object getProperty(Object object) throws Exception;
058    
059        /**
060         * Sets the property on the given object to the new value
061         * 
062         * @param object on which to set the property
063         * @param newValue the new value of the property
064         * @throws Exception if the property could not be set
065         */
066        public abstract void setProperty(Object object, Object newValue);
067    
068        public String getName() {
069            return name;
070        }
071    
072        /**
073         * @return the type of the property
074         */
075        public Class getType() {
076            return type;
077        }
078    
079    }