001 /*
002 * $Id: MetaFieldProperty.java 4287 2006-12-01 13:00:13Z 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 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
036 package groovy.lang;
037
038 import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation;
039
040 import java.lang.reflect.Field;
041 import java.lang.reflect.Modifier;
042 import java.security.AccessController;
043 import java.security.PrivilegedActionException;
044 import java.security.PrivilegedExceptionAction;
045
046 /**
047 * Represents a property on a bean which may have a getter and/or a setter
048 *
049 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
050 * @version $Revision: 4287 $
051 */
052 public class MetaFieldProperty extends MetaProperty {
053
054 private Field field;
055
056 public MetaFieldProperty(Field field) {
057 super(field.getName(), field.getType());
058 this.field = field;
059 }
060
061 /**
062 * @return the property of the given object
063 * @throws Exception if the property could not be evaluated
064 */
065 public Object getProperty(final Object object) {
066 try {
067 Object value = (Object) AccessController.doPrivileged(new PrivilegedExceptionAction() {
068 public Object run() throws IllegalAccessException {
069 field.setAccessible(true);
070 return field.get(object);
071 }
072 });
073 return value;
074 } catch (PrivilegedActionException pe) {
075 throw new GroovyRuntimeException("Cannot get the property '" + name + "'.", pe.getException());
076 }
077 }
078
079 /**
080 * Sets the property on the given object to the new value
081 *
082 * @param object on which to set the property
083 * @param newValue the new value of the property
084 * @throws RuntimeException if the property could not be set
085 */
086 public void setProperty(final Object object, Object newValue) {
087 final Object goalValue = DefaultTypeTransformation.castToType(newValue, field.getType());
088 try {
089 AccessController.doPrivileged(new PrivilegedExceptionAction() {
090 public Object run() throws IllegalAccessException, GroovyRuntimeException {
091 field.setAccessible(true);
092 field.set(object, goalValue);
093 return null;
094 }
095 });
096 } catch (PrivilegedActionException ex) {
097 throw new GroovyRuntimeException("Cannot set the property '" + name + "'.", ex.getException());
098 }
099 }
100
101 private String toName(Class c) {
102 String s = c.toString();
103 if (s.startsWith("class ") && s.length() > 6)
104 return s.substring(6);
105 else
106 return s;
107 }
108
109 public int getModifiers() {
110 return field.getModifiers();
111 }
112
113 public boolean isStatic() {
114 return Modifier.isStatic(field.getModifiers());
115 }
116 }