| /* |
| $Id$ |
| |
| Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved. |
| |
| Redistribution and use of this software and associated documentation |
| ("Software"), with or without modification, are permitted provided |
| that the following conditions are met: |
| |
| 1. Redistributions of source code must retain copyright |
| statements and notices. Redistributions must also contain a |
| copy of this document. |
| |
| 2. Redistributions in binary form must reproduce the |
| above copyright notice, this list of conditions and the |
| following disclaimer in the documentation and/or other |
| materials provided with the distribution. |
| |
| 3. The name "groovy" must not be used to endorse or promote |
| products derived from this Software without prior written |
| permission of The Codehaus. For written permission, |
| please contact info@codehaus.org. |
| |
| 4. Products derived from this Software may not be called "groovy" |
| nor may "groovy" appear in their names without prior written |
| permission of The Codehaus. "groovy" is a registered |
| trademark of The Codehaus. |
| |
| 5. Due credit should be given to The Codehaus - |
| http://groovy.codehaus.org/ |
| |
| THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS |
| ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT |
| NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
| THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
| INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| */ |
| package org.codehaus.groovy.ast.expr; |
| |
| import org.codehaus.groovy.ast.ClassNode; |
| import org.codehaus.groovy.ast.GroovyCodeVisitor; |
| import org.codehaus.groovy.ast.Variable; |
| import org.codehaus.groovy.syntax.Token; |
| import org.codehaus.groovy.syntax.Types; |
| |
| /** |
| * Represents two expressions and an operation |
| * |
| * @author <a href="mailto:james@coredevelopers.net">James Strachan</a> |
| * @version $Revision$ |
| */ |
| public class BinaryExpression extends Expression { |
| |
| private Expression leftExpression; |
| private Expression rightExpression; |
| private Token operation; |
| |
| public BinaryExpression(Expression leftExpression, |
| Token operation, |
| Expression rightExpression) { |
| this.leftExpression = leftExpression; |
| this.operation = operation; |
| this.rightExpression = rightExpression; |
| } |
| |
| public String toString() { |
| return super.toString() +"[" + leftExpression + operation + rightExpression + "]"; |
| } |
| |
| public void visit(GroovyCodeVisitor visitor) { |
| visitor.visitBinaryExpression(this); |
| } |
| |
| public Expression transformExpression(ExpressionTransformer transformer) { |
| Expression ret = new BinaryExpression(transformer.transform(leftExpression), operation, transformer.transform(rightExpression)); |
| ret.setSourcePosition(this); |
| return ret; |
| } |
| |
| public Expression getLeftExpression() { |
| return leftExpression; |
| } |
| |
| public void setLeftExpression(Expression leftExpression) { |
| this.leftExpression = leftExpression; |
| } |
| |
| public void setRightExpression(Expression rightExpression) { |
| this.rightExpression = rightExpression; |
| } |
| |
| public Token getOperation() { |
| return operation; |
| } |
| |
| public Expression getRightExpression() { |
| return rightExpression; |
| } |
| |
| public String getText() { |
| if (operation.getType() == Types.LEFT_SQUARE_BRACKET) { |
| return leftExpression.getText() + "[" + rightExpression.getText() + "]"; |
| } |
| return "(" + leftExpression.getText() + " " + operation.getText() + " " + rightExpression.getText() + ")"; |
| } |
| |
| |
| /** |
| * Creates an assignment expression in which the specified expression |
| * is written into the specified variable name. |
| */ |
| |
| public static BinaryExpression newAssignmentExpression( Variable variable, Expression rhs ) { |
| VariableExpression lhs = new VariableExpression( variable ); |
| Token operator = Token.newPlaceholder( Types.ASSIGN ); |
| |
| return new BinaryExpression( lhs, operator, rhs ); |
| } |
| |
| |
| /** |
| * Creates variable initialization expression in which the specified expression |
| * is written into the specified variable name. |
| */ |
| |
| public static BinaryExpression newInitializationExpression( String variable, ClassNode type, Expression rhs ) { |
| VariableExpression lhs = new VariableExpression( variable ); |
| |
| if( type != null ) { |
| lhs.setType(type); |
| } |
| |
| Token operator = Token.newPlaceholder( Types.ASSIGN ); |
| |
| return new BinaryExpression( lhs, operator, rhs ); |
| } |
| |
| } |