001 /*
002 $Id: BinaryExpression.java,v 1.10 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.math.BigDecimal;
049 import java.math.BigInteger;
050
051 import org.codehaus.groovy.ast.ClassNode;
052 import org.codehaus.groovy.ast.GroovyCodeVisitor;
053 import org.codehaus.groovy.syntax.Token;
054 import org.codehaus.groovy.syntax.Types;
055
056 /**
057 * Represents two expressions and an operation
058 *
059 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
060 * @version $Revision: 1.10 $
061 */
062 public class BinaryExpression extends Expression {
063
064 private Expression leftExpression;
065 private Expression rightExpression;
066 private Token operation;
067
068 public BinaryExpression(Expression leftExpression,
069 Token operation,
070 Expression rightExpression) {
071 this.leftExpression = leftExpression;
072 this.operation = operation;
073 this.rightExpression = rightExpression;
074
075 }
076
077 private static boolean isFloatingPoint(Class cls) {
078 return cls == Double.class || cls == Float.class;
079 }
080
081 private static boolean isInteger(Class cls) {
082 return cls == Integer.class || cls == Byte.class || cls == Short.class || cls == Character.class;
083 }
084
085 private static boolean isLong(Class cls) {
086 return cls == Long.class;
087 }
088
089 private static boolean isBigDecimal(Class cls) {
090 return cls == BigDecimal.class;
091 }
092
093 private static boolean isBigInteger(Class cls) {
094 return cls == BigInteger.class;
095 }
096
097 public String toString() {
098 return super.toString() +"[" + leftExpression + operation + rightExpression + "]";
099 }
100
101 public void visit(GroovyCodeVisitor visitor) {
102 visitor.visitBinaryExpression(this);
103 }
104
105 public Expression transformExpression(ExpressionTransformer transformer) {
106 return new BinaryExpression(transformer.transform(leftExpression), operation, transformer.transform(rightExpression));
107 }
108
109 public Expression getLeftExpression() {
110 return leftExpression;
111 }
112
113 public void setLeftExpression(Expression leftExpression) {
114 this.leftExpression = leftExpression;
115 }
116
117 public void setRightExpression(Expression rightExpression) {
118 this.rightExpression = rightExpression;
119 }
120
121 public Token getOperation() {
122 return operation;
123 }
124
125 public Expression getRightExpression() {
126 return rightExpression;
127 }
128
129 public String getText() {
130 if (operation.getType() == Types.LEFT_SQUARE_BRACKET) {
131 return leftExpression.getText() + "[" + rightExpression.getText() + "]";
132 }
133 return "(" + leftExpression.getText() + " " + operation.getText() + " " + rightExpression.getText() + ")";
134 }
135
136
137 /**
138 * Creates an assignment expression in which the specified expression
139 * is written into the specified variable name.
140 */
141
142 public static BinaryExpression newAssignmentExpression( String variable, Expression rhs ) {
143 VariableExpression lhs = new VariableExpression( variable );
144 Token operator = Token.newPlaceholder( Types.ASSIGN );
145
146 return new BinaryExpression( lhs, operator, rhs );
147 }
148
149
150 /**
151 * Creates variable initialization expression in which the specified expression
152 * is written into the specified variable name.
153 */
154
155 public static BinaryExpression newInitializationExpression( String variable, ClassNode type, Expression rhs ) {
156 VariableExpression lhs = new VariableExpression( variable );
157
158 if( type != null ) {
159 lhs.setType(type);
160 }
161
162 Token operator = Token.newPlaceholder( Types.ASSIGN );
163
164 return new BinaryExpression( lhs, operator, rhs );
165 }
166
167 }