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1   /*
2    $Id: AttributeExpression.java,v 1.5 2006/01/19 00:06:51 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
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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
38   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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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: 1.5 $
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          Expression ret = new AttributeExpression(transformer.transform(objectExpression),property,safe);
94          ret.setSourcePosition(this);
95          return ret;
96      }
97  
98      public Expression getObjectExpression() {
99          return objectExpression;
100     }
101 
102     public String getProperty() {
103         return property;
104     }
105 
106     public String getText() {
107         return objectExpression.getText() + "." + property;
108     }
109 
110     /***
111      * @return is this a safe navigation, i.e. if true then if the source object is null
112      * then this navigation will return null
113      */
114     public boolean isSafe() {
115         return safe;
116     }
117 
118     public boolean isSpreadSafe() {
119         return spreadSafe;
120     }
121 
122     public void setSpreadSafe(boolean value) {
123         spreadSafe = value;
124     }
125 
126     public String toString() {
127         return super.toString() + "[object: " + objectExpression + " property: " + property + "]";
128     }
129 
130     public void setStatic(boolean aStatic) {
131         this.isStatic = aStatic;
132     }
133 
134     public Method getGetter() {
135         return getter;
136     }
137 
138     public Method getSetter() {
139         return setter;
140     }
141     
142     public Field getField() {
143         return field;
144     }
145 
146     public void setAccess(int access) {
147         this.access = access;
148     }
149 
150     public int getAccess() {
151         return access;
152     }
153 }