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1   /*
2    $Id: AttributeExpression.java,v 1.4 2005/11/13 16:42:09 blackdrag Exp $
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
8    that the following conditions are met:
9   
10   1. Redistributions of source code must retain copyright
11      statements and notices.  Redistributions must also contain a
12      copy of this document.
13  
14   2. Redistributions in binary form must reproduce the
15      above copyright notice, this list of conditions and the
16      following disclaimer in the documentation and/or other
17      materials provided with the distribution.
18  
19   3. The name "groovy" must not be used to endorse or promote
20      products derived from this Software without prior written
21      permission of The Codehaus.  For written permission,
22      please contact info@codehaus.org.
23  
24   4. Products derived from this Software may not be called "groovy"
25      nor may "groovy" appear in their names without prior written
26      permission of The Codehaus. "groovy" is a registered
27      trademark of The Codehaus.
28  
29   5. Due credit should be given to The Codehaus -
30      http://groovy.codehaus.org/
31  
32   THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
33   ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
34   NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
35   FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
36   THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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44  
45   */
46  package org.codehaus.groovy.ast.expr;
47  
48  import java.lang.reflect.Field;
49  import java.lang.reflect.Method;
50  
51  import org.codehaus.groovy.ast.GroovyCodeVisitor;
52  
53  
54  /***
55   * Represents an attribute access (accessing the field of a class) such as the expression "foo.@bar".
56   * 
57   * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
58   * @version $Revision: 1.4 $
59   */
60  public class AttributeExpression extends Expression {
61  
62      private Expression objectExpression;
63      private String property;
64      private boolean spreadSafe = false;
65      private boolean safe = false;
66      private boolean isStatic = false;
67  
68      private Method getter = null;
69      private Method setter = null;
70  
71      private Field field = null;
72      private int access = -1;
73  
74      public boolean isStatic() {
75          return isStatic;
76      }
77  
78      public AttributeExpression(Expression objectExpression, String property) {
79          this(objectExpression, property, false);
80      }
81  
82      public AttributeExpression(Expression objectExpression, String property, boolean safe) {
83          this.objectExpression = objectExpression;
84          this.property = property;
85          this.safe = safe;
86      }
87  
88      public void visit(GroovyCodeVisitor visitor) {
89          visitor.visitAttributeExpression(this);
90      }
91  
92      public Expression transformExpression(ExpressionTransformer transformer) {
93          return new AttributeExpression(transformer.transform(objectExpression),property,safe);
94      }
95  
96      public Expression getObjectExpression() {
97          return objectExpression;
98      }
99  
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 }