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 }