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Groovy: A powerful, dynamic language for the JVM
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/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  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.ClassHelper;
import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.ast.GroovyCodeVisitor;

/**
 * Represents a ternary expression (booleanExpression) ? expression : expression
 * 
 * @author James Strachan
 */
public class TernaryExpression extends Expression {

    private BooleanExpression booleanExpression;
    private Expression trueExpression;
    private Expression falseExpression;

    public TernaryExpression(
        BooleanExpression booleanExpression,
        Expression trueExpression,
        Expression falseExpression) {
        this.booleanExpression = booleanExpression;
        this.trueExpression = trueExpression;
        this.falseExpression = falseExpression;
    }
    public void visit(GroovyCodeVisitor visitor) {
        visitor.visitTernaryExpression(this);
    }

    public Expression transformExpression(ExpressionTransformer transformer) {
        Expression ret = new TernaryExpression(
                (BooleanExpression) transformer.transform(booleanExpression),
                transformer.transform(trueExpression),
                transformer.transform(falseExpression)); 
        ret.setSourcePosition(this);
        ret.copyNodeMetaData(this);
        return ret; 
    }

    public String toString() {
        return super.toString() +"[" + booleanExpression + " ? " + trueExpression + " : " + falseExpression + "]";
    }
    
    public BooleanExpression getBooleanExpression() {
        return booleanExpression;
    }

    public Expression getFalseExpression() {
        return falseExpression;
    }

    public Expression getTrueExpression() {
        return trueExpression;
    }

    public String getText() {
        return "("
            + booleanExpression.getText()
            + ") ? "
            + trueExpression.getText()
            + " : "
            + falseExpression.getText();
    }

    public ClassNode getType() {
        return ClassHelper.OBJECT_TYPE;
    }
}