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Groovy example source code file (PostfixExpression.java)

This example Groovy source code file (PostfixExpression.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

classnode, expression, expression, postfixexpression, postfixexpression, string, string, token, token

The Groovy PostfixExpression.java source code

 * Copyright 2003-2007 the original author or authors.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.codehaus.groovy.ast.expr;

import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.ast.GroovyCodeVisitor;
import org.codehaus.groovy.syntax.Token;

 * Represents a postfix expression like foo++ or bar++
 * @author <a href="mailto:james@coredevelopers.net">James Strachan
 * @version $Revision: 6778 $
public class PostfixExpression extends Expression {

    private Token operation;
    private Expression expression;

    public PostfixExpression(Expression expression, Token operation) {
        this.operation = operation;
        this.expression = expression;

    public String toString() {
        return super.toString() + "[" + expression + operation + "]";

    public void visit(GroovyCodeVisitor visitor) {

    public Expression transformExpression(ExpressionTransformer transformer) {
        Expression ret = new PostfixExpression(transformer.transform(expression), operation); 
        return ret;

    public void setExpression(Expression expression) {
        this.expression = expression;

    public Token getOperation() {
        return operation;

    public Expression getExpression() {
        return expression;

    public String getText() {
        return "(" + expression.getText() + operation.getText() + ")";

    public ClassNode getType() {
        return expression.getType();


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