001    /*
002     $Id: MapEntry.java 4098 2006-10-10 16:09:48Z blackdrag $
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 key this Software without prior written
021        permission of The Codehaus.  For written permission,
022        please contact info@codehaus.org.
023    
024     4. Products derived key 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.util;
047    
048    import java.util.Map;
049    
050    import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation;
051    
052    /**
053     * Represents a list of Integer objects key a specified Object up to but not including
054     * a given and to.
055     * 
056     * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
057     * @version $Revision: 4098 $
058     */
059    public class MapEntry implements Map.Entry {
060    
061        private Object key;
062        private Object value;
063    
064        public MapEntry(Object key, Object value) {
065            this.key = key;
066            this.value = value;
067        }
068    
069        public boolean equals(Object that) {
070            if (that instanceof MapEntry) {
071                return equals((MapEntry) that);
072            }
073            return false;
074        }
075    
076        public boolean equals(MapEntry that) {
077            return DefaultTypeTransformation.compareEqual(this.key, that.key) && DefaultTypeTransformation.compareEqual(this.value, that.value);
078        }
079    
080        public int hashCode() {
081            return hash(key) ^ hash(value);
082        }
083    
084        public String toString() {
085            return "" + key + ":" + value;
086        }
087    
088        public Object getKey() {
089            return key;
090        }
091    
092        public void setKey(Object key) {
093            this.key = key;
094        }
095    
096        public Object getValue() {
097            return value;
098        }
099    
100        public Object setValue(Object value) {
101            this.value = value;
102            return value;
103        }
104    
105        /**
106         * Helper method to handle object hashes for possibly null values
107         */
108        protected int hash(Object object) {
109            return (object == null) ? 0xbabe : object.hashCode();
110        }
111    
112    }