001 /*
002 $Id: AttributeExpression.java,v 1.4 2005/11/13 16:42:09 blackdrag 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
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 from this Software without prior written
021 permission of The Codehaus. For written permission,
022 please contact info@codehaus.org.
023
024 4. Products derived from 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 org.codehaus.groovy.ast.expr;
047
048 import java.lang.reflect.Field;
049 import java.lang.reflect.Method;
050
051 import org.codehaus.groovy.ast.GroovyCodeVisitor;
052
053
054 /**
055 * Represents an attribute access (accessing the field of a class) such as the expression "foo.@bar".
056 *
057 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
058 * @version $Revision: 1.4 $
059 */
060 public class AttributeExpression extends Expression {
061
062 private Expression objectExpression;
063 private String property;
064 private boolean spreadSafe = false;
065 private boolean safe = false;
066 private boolean isStatic = false;
067
068 private Method getter = null;
069 private Method setter = null;
070
071 private Field field = null;
072 private int access = -1;
073
074 public boolean isStatic() {
075 return isStatic;
076 }
077
078 public AttributeExpression(Expression objectExpression, String property) {
079 this(objectExpression, property, false);
080 }
081
082 public AttributeExpression(Expression objectExpression, String property, boolean safe) {
083 this.objectExpression = objectExpression;
084 this.property = property;
085 this.safe = safe;
086 }
087
088 public void visit(GroovyCodeVisitor visitor) {
089 visitor.visitAttributeExpression(this);
090 }
091
092 public Expression transformExpression(ExpressionTransformer transformer) {
093 return new AttributeExpression(transformer.transform(objectExpression),property,safe);
094 }
095
096 public Expression getObjectExpression() {
097 return objectExpression;
098 }
099
100 public String getProperty() {
101 return property;
102 }
103
104 public String getText() {
105 return objectExpression.getText() + "." + property;
106 }
107
108 /**
109 * @return is this a safe navigation, i.e. if true then if the source object is null
110 * then this navigation will return null
111 */
112 public boolean isSafe() {
113 return safe;
114 }
115
116 public boolean isSpreadSafe() {
117 return spreadSafe;
118 }
119
120 public void setSpreadSafe(boolean value) {
121 spreadSafe = value;
122 }
123
124 public String toString() {
125 return super.toString() + "[object: " + objectExpression + " property: " + property + "]";
126 }
127
128 public void setStatic(boolean aStatic) {
129 this.isStatic = aStatic;
130 }
131
132 public Method getGetter() {
133 return getter;
134 }
135
136 public Method getSetter() {
137 return setter;
138 }
139
140 public Field getField() {
141 return field;
142 }
143
144 public void setAccess(int access) {
145 this.access = access;
146 }
147
148 public int getAccess() {
149 return access;
150 }
151 }