1 /*
2 * $Id: MetaFieldProperty.java 4287 2006-12-01 13:00:13Z blackdrag $
3 *
4 * Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
5 *
6 * Redistribution and use of this software and associated documentation
7 * ("Software"), with or without modification, are permitted provided that the
8 * following conditions are met:
9 * 1. Redistributions of source code must retain copyright statements and
10 * notices. Redistributions must also contain a copy of this document.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name "groovy" must not be used to endorse or promote products
15 * derived from this Software without prior written permission of The Codehaus.
16 * For written permission, please contact info@codehaus.org.
17 * 4. Products derived from this Software may not be called "groovy" nor may
18 * "groovy" appear in their names without prior written permission of The
19 * Codehaus. "groovy" is a registered trademark of The Codehaus.
20 * 5. Due credit should be given to The Codehaus - http://groovy.codehaus.org/
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS ``AS IS'' AND ANY
23 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25 * DISCLAIMED. IN NO EVENT SHALL THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR
26 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
32 * DAMAGE.
33 *
34 */
35
36 package groovy.lang;
37
38 import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation;
39
40 import java.lang.reflect.Field;
41 import java.lang.reflect.Modifier;
42 import java.security.AccessController;
43 import java.security.PrivilegedActionException;
44 import java.security.PrivilegedExceptionAction;
45
46 /***
47 * Represents a property on a bean which may have a getter and/or a setter
48 *
49 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
50 * @version $Revision: 4287 $
51 */
52 public class MetaFieldProperty extends MetaProperty {
53
54 private Field field;
55
56 public MetaFieldProperty(Field field) {
57 super(field.getName(), field.getType());
58 this.field = field;
59 }
60
61 /***
62 * @return the property of the given object
63 * @throws Exception if the property could not be evaluated
64 */
65 public Object getProperty(final Object object) {
66 try {
67 Object value = (Object) AccessController.doPrivileged(new PrivilegedExceptionAction() {
68 public Object run() throws IllegalAccessException {
69 field.setAccessible(true);
70 return field.get(object);
71 }
72 });
73 return value;
74 } catch (PrivilegedActionException pe) {
75 throw new GroovyRuntimeException("Cannot get the property '" + name + "'.", pe.getException());
76 }
77 }
78
79 /***
80 * Sets the property on the given object to the new value
81 *
82 * @param object on which to set the property
83 * @param newValue the new value of the property
84 * @throws RuntimeException if the property could not be set
85 */
86 public void setProperty(final Object object, Object newValue) {
87 final Object goalValue = DefaultTypeTransformation.castToType(newValue, field.getType());
88 try {
89 AccessController.doPrivileged(new PrivilegedExceptionAction() {
90 public Object run() throws IllegalAccessException, GroovyRuntimeException {
91 field.setAccessible(true);
92 field.set(object, goalValue);
93 return null;
94 }
95 });
96 } catch (PrivilegedActionException ex) {
97 throw new GroovyRuntimeException("Cannot set the property '" + name + "'.", ex.getException());
98 }
99 }
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 }