Source Code Cross Referenced for MetaFieldProperty.java in  » Scripting » groovy-1.0 » groovy » lang » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » groovy 1.0 » groovy.lang 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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
068:                            .doPrivileged(new PrivilegedExceptionAction() {
069:                                public Object run()
070:                                        throws IllegalAccessException {
071:                                    field.setAccessible(true);
072:                                    return field.get(object);
073:                                }
074:                            });
075:                    return value;
076:                } catch (PrivilegedActionException pe) {
077:                    throw new GroovyRuntimeException(
078:                            "Cannot get the property '" + name + "'.", pe
079:                                    .getException());
080:                }
081:            }
082:
083:            /**
084:             * Sets the property on the given object to the new value
085:             * 
086:             * @param object on which to set the property
087:             * @param newValue the new value of the property
088:             * @throws RuntimeException if the property could not be set
089:             */
090:            public void setProperty(final Object object, Object newValue) {
091:                final Object goalValue = DefaultTypeTransformation.castToType(
092:                        newValue, field.getType());
093:                try {
094:                    AccessController
095:                            .doPrivileged(new PrivilegedExceptionAction() {
096:                                public Object run()
097:                                        throws IllegalAccessException,
098:                                        GroovyRuntimeException {
099:                                    field.setAccessible(true);
100:                                    field.set(object, goalValue);
101:                                    return null;
102:                                }
103:                            });
104:                } catch (PrivilegedActionException ex) {
105:                    throw new GroovyRuntimeException(
106:                            "Cannot set the property '" + name + "'.", ex
107:                                    .getException());
108:                }
109:            }
110:
111:            private String toName(Class c) {
112:                String s = c.toString();
113:                if (s.startsWith("class ") && s.length() > 6)
114:                    return s.substring(6);
115:                else
116:                    return s;
117:            }
118:
119:            public int getModifiers() {
120:                return field.getModifiers();
121:            }
122:
123:            public boolean isStatic() {
124:                return Modifier.isStatic(field.getModifiers());
125:            }
126:        }
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