001 /*
002 $Id: PropertyExpression.java,v 1.8 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 import java.lang.reflect.Modifier;
051
052 import org.codehaus.groovy.ast.ClassHelper;
053 import org.codehaus.groovy.ast.GroovyCodeVisitor;
054
055 /**
056 * Represents a property access such as the expression "foo.bar".
057 *
058 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
059 * @version $Revision: 1.8 $
060 */
061 public class PropertyExpression extends Expression {
062
063 private Expression objectExpression;
064 private String property;
065 private boolean spreadSafe = false;
066 private boolean safe = false;
067 private boolean isStatic = false;
068
069 private Method getter = null;
070 private Method setter = null;
071
072 private Field field = null;
073 private int access = -1;
074
075 public boolean isStatic() {
076 return isStatic;
077 }
078
079 public PropertyExpression(Expression objectExpression, String property) {
080 this(objectExpression, property, false);
081 }
082
083 public PropertyExpression(Expression objectExpression, String property, boolean safe) {
084 this.objectExpression = objectExpression;
085 this.property = property;
086 this.safe = safe;
087 }
088
089 public void visit(GroovyCodeVisitor visitor) {
090 visitor.visitPropertyExpression(this);
091 }
092
093 public boolean isDynamic() {
094 return true;
095 }
096
097 public Expression transformExpression(ExpressionTransformer transformer) {
098 return this;
099 }
100
101 public Expression getObjectExpression() {
102 return objectExpression;
103 }
104
105 public void setObjectExpression(Expression exp) {
106 objectExpression=exp;
107 }
108
109 public String getProperty() {
110 return property;
111 }
112
113 public String getText() {
114 return objectExpression.getText() + "." + property;
115 }
116
117 /**
118 * @return is this a safe navigation, i.e. if true then if the source object is null
119 * then this navigation will return null
120 */
121 public boolean isSafe() {
122 return safe;
123 }
124
125 public boolean isSpreadSafe() {
126 return spreadSafe;
127 }
128
129 public void setSpreadSafe(boolean value) {
130 spreadSafe = value;
131 }
132
133 public String toString() {
134 return super.toString() + "[object: " + objectExpression + " property: " + property + "]";
135 }
136
137 public void setStatic(boolean aStatic) {
138 this.isStatic = aStatic;
139 }
140
141 public Method getGetter() {
142 return getter;
143 }
144
145 public Method getSetter() {
146 return setter;
147 }
148
149 public void setField(Field fld) {
150 field = fld;
151 setStatic(Modifier.isStatic(fld.getModifiers()));
152 setType(ClassHelper.make(fld.getType()));
153 }
154
155 public Field getField() {
156 return field;
157 }
158
159 public void setAccess(int access) {
160 this.access = access;
161 }
162
163 public int getAccess() {
164 return access;
165 }
166 }