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 }