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    }