001 /* 002 $Id: BinaryExpression.java 3419 2006-01-19 00:07:02Z 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 org.codehaus.groovy.ast.ClassNode; 049 import org.codehaus.groovy.ast.GroovyCodeVisitor; 050 import org.codehaus.groovy.ast.Variable; 051 import org.codehaus.groovy.syntax.Token; 052 import org.codehaus.groovy.syntax.Types; 053 054 /** 055 * Represents two expressions and an operation 056 * 057 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a> 058 * @version $Revision: 3419 $ 059 */ 060 public class BinaryExpression extends Expression { 061 062 private Expression leftExpression; 063 private Expression rightExpression; 064 private Token operation; 065 066 public BinaryExpression(Expression leftExpression, 067 Token operation, 068 Expression rightExpression) { 069 this.leftExpression = leftExpression; 070 this.operation = operation; 071 this.rightExpression = rightExpression; 072 } 073 074 public String toString() { 075 return super.toString() +"[" + leftExpression + operation + rightExpression + "]"; 076 } 077 078 public void visit(GroovyCodeVisitor visitor) { 079 visitor.visitBinaryExpression(this); 080 } 081 082 public Expression transformExpression(ExpressionTransformer transformer) { 083 Expression ret = new BinaryExpression(transformer.transform(leftExpression), operation, transformer.transform(rightExpression)); 084 ret.setSourcePosition(this); 085 return ret; 086 } 087 088 public Expression getLeftExpression() { 089 return leftExpression; 090 } 091 092 public void setLeftExpression(Expression leftExpression) { 093 this.leftExpression = leftExpression; 094 } 095 096 public void setRightExpression(Expression rightExpression) { 097 this.rightExpression = rightExpression; 098 } 099 100 public Token getOperation() { 101 return operation; 102 } 103 104 public Expression getRightExpression() { 105 return rightExpression; 106 } 107 108 public String getText() { 109 if (operation.getType() == Types.LEFT_SQUARE_BRACKET) { 110 return leftExpression.getText() + "[" + rightExpression.getText() + "]"; 111 } 112 return "(" + leftExpression.getText() + " " + operation.getText() + " " + rightExpression.getText() + ")"; 113 } 114 115 116 /** 117 * Creates an assignment expression in which the specified expression 118 * is written into the specified variable name. 119 */ 120 121 public static BinaryExpression newAssignmentExpression( Variable variable, Expression rhs ) { 122 VariableExpression lhs = new VariableExpression( variable ); 123 Token operator = Token.newPlaceholder( Types.ASSIGN ); 124 125 return new BinaryExpression( lhs, operator, rhs ); 126 } 127 128 129 /** 130 * Creates variable initialization expression in which the specified expression 131 * is written into the specified variable name. 132 */ 133 134 public static BinaryExpression newInitializationExpression( String variable, ClassNode type, Expression rhs ) { 135 VariableExpression lhs = new VariableExpression( variable ); 136 137 if( type != null ) { 138 lhs.setType(type); 139 } 140 141 Token operator = Token.newPlaceholder( Types.ASSIGN ); 142 143 return new BinaryExpression( lhs, operator, rhs ); 144 } 145 146 }