001 /* 002 $Id: PropertyExpression.java 4287 2006-12-01 13:00:13Z blackdrag $ 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: 4287 $ 060 */ 061 public class PropertyExpression extends Expression { 062 063 private Expression objectExpression; 064 private Expression 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 private boolean implicitThis = false; 075 076 public boolean isStatic() { 077 return isStatic; 078 } 079 080 public PropertyExpression(Expression objectExpression, String property) { 081 this(objectExpression, new ConstantExpression(property), false); 082 } 083 084 public PropertyExpression(Expression objectExpression, Expression property) { 085 this(objectExpression, property, false); 086 } 087 088 public PropertyExpression(Expression objectExpression, Expression property, boolean safe) { 089 this.objectExpression = objectExpression; 090 this.property = property; 091 this.safe = safe; 092 } 093 094 public void visit(GroovyCodeVisitor visitor) { 095 visitor.visitPropertyExpression(this); 096 } 097 098 public boolean isDynamic() { 099 return true; 100 } 101 102 public Expression transformExpression(ExpressionTransformer transformer) { 103 return this; 104 } 105 106 public Expression getObjectExpression() { 107 return objectExpression; 108 } 109 110 public void setObjectExpression(Expression exp) { 111 objectExpression=exp; 112 } 113 114 public Expression getProperty() { 115 return property; 116 } 117 118 public String getPropertyAsString() { 119 if (property==null) return null; 120 if (! (property instanceof ConstantExpression)) return null; 121 ConstantExpression constant = (ConstantExpression) property; 122 return constant.getText(); 123 } 124 125 public String getText() { 126 return objectExpression.getText() + "." + property.getText(); 127 } 128 129 /** 130 * @return is this a safe navigation, i.e. if true then if the source object is null 131 * then this navigation will return null 132 */ 133 public boolean isSafe() { 134 return safe; 135 } 136 137 public boolean isSpreadSafe() { 138 return spreadSafe; 139 } 140 141 public void setSpreadSafe(boolean value) { 142 spreadSafe = value; 143 } 144 145 public String toString() { 146 return super.toString() + "[object: " + objectExpression + " property: " + property + "]"; 147 } 148 149 public void setStatic(boolean aStatic) { 150 this.isStatic = aStatic; 151 } 152 153 public Method getGetter() { 154 return getter; 155 } 156 157 public Method getSetter() { 158 return setter; 159 } 160 161 public void setField(Field fld) { 162 field = fld; 163 setStatic(Modifier.isStatic(fld.getModifiers())); 164 setType(ClassHelper.make(fld.getType())); 165 } 166 167 public Field getField() { 168 return field; 169 } 170 171 public void setAccess(int access) { 172 this.access = access; 173 } 174 175 public int getAccess() { 176 return access; 177 } 178 179 public boolean isImplicitThis(){ 180 return implicitThis; 181 } 182 183 public void setImplicitThis(boolean it) { 184 implicitThis = it; 185 } 186 }