001 /* 002 $Id: VariableExpression.java,v 1.13 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 org.codehaus.groovy.ast.ClassHelper; 049 import org.codehaus.groovy.ast.ClassNode; 050 import org.codehaus.groovy.ast.GroovyCodeVisitor; 051 import org.codehaus.groovy.ast.Variable; 052 053 /** 054 * Represents a local variable name, the simplest form of expression. e.g. "foo". 055 * 056 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a> 057 * @version $Revision: 1.13 $ 058 */ 059 public class VariableExpression extends Expression implements Variable { 060 061 public static final VariableExpression THIS_EXPRESSION = new VariableExpression("this", ClassHelper.DYNAMIC_TYPE); 062 public static final VariableExpression SUPER_EXPRESSION = new VariableExpression("super", ClassHelper.DYNAMIC_TYPE); 063 064 private String variable; 065 private boolean inStaticContext; 066 private boolean isDynamicTyped=false; 067 068 public VariableExpression(String variable, ClassNode type) { 069 this.variable = variable; 070 super.setType(ClassHelper.getWrapper(type)); 071 } 072 073 public VariableExpression(String variable) { 074 this(variable, ClassHelper.DYNAMIC_TYPE); 075 } 076 077 public void visit(GroovyCodeVisitor visitor) { 078 visitor.visitVariableExpression(this); 079 } 080 081 public Expression transformExpression(ExpressionTransformer transformer) { 082 return this; 083 } 084 085 public String getText() { 086 return variable; 087 } 088 089 public String getName() { 090 return variable; 091 } 092 093 /** 094 * @return true if this variable is dynamically typed 095 */ 096 public String toString() { 097 return super.toString() + "[variable: " + variable + (this.isDynamicTyped() ? "" : " type: " + getType()) + "]"; 098 } 099 100 public Expression getInitialExpression() { 101 return null; 102 } 103 104 public boolean hasInitialExpression() { 105 return false; 106 } 107 108 public boolean isInStaticContext() { 109 return inStaticContext; 110 } 111 112 public void setInStaticContext(boolean inStaticContext) { 113 this.inStaticContext = inStaticContext; 114 } 115 116 public void setType(ClassNode cn){ 117 super.setType(cn); 118 isDynamicTyped |= ClassHelper.DYNAMIC_TYPE==cn; 119 } 120 121 public boolean isDynamicTyped() { 122 return isDynamicTyped; 123 } 124 }