/*******************************************************************************
 * Copyright (c) 2004, 2007 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * IBM - Initial API and implementation
 *******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.cpp;

import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTConditionalExpression;
import org.eclipse.cdt.core.dom.ast.IASTExpression;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.internal.core.dom.parser.IASTAmbiguityParent;

/**
 * @author jcamelon
 */
public class CPPASTConditionalExpression extends CPPASTNode implements
        IASTConditionalExpression, IASTAmbiguityParent {
	
    private IASTExpression condition;
    private IASTExpression negative;
    private IASTExpression postive;

    
    public CPPASTConditionalExpression() {
	}

	public CPPASTConditionalExpression(IASTExpression condition, IASTExpression postive, IASTExpression negative) {
    	setLogicalConditionExpression(condition);
    	setPositiveResultExpression(postive);
    	setNegativeResultExpression(negative);
	}

	public IASTExpression getLogicalConditionExpression() {
        return condition;
    }

    public void setLogicalConditionExpression(IASTExpression expression) {
        condition = expression;
        if (expression != null) {
			expression.setParent(this);
			expression.setPropertyInParent(LOGICAL_CONDITION);
		}
    }

    public IASTExpression getPositiveResultExpression() {
        return postive;
    }

    public void setPositiveResultExpression(IASTExpression expression) {
        this.postive = expression;
        if (expression != null) {
			expression.setParent(this);
			expression.setPropertyInParent(POSITIVE_RESULT);
		}
    }

    public IASTExpression getNegativeResultExpression() {
        return negative;
    }

    public void setNegativeResultExpression(IASTExpression expression) {
        this.negative = expression;
        if (expression != null) {
			expression.setParent(this);
			expression.setPropertyInParent(NEGATIVE_RESULT);
		}
    }

    public boolean accept( ASTVisitor action ){
        if( action.shouldVisitExpressions ){
		    switch( action.visit( this ) ){
	            case ASTVisitor.PROCESS_ABORT : return false;
	            case ASTVisitor.PROCESS_SKIP  : return true;
	            default : break;
	        }
		}
        
        if( condition != null ) if( !condition.accept( action ) ) return false;
        if( postive != null ) if( !postive.accept( action ) ) return false;
        if( negative != null ) if( !negative.accept( action ) ) return false;
        
        if( action.shouldVisitExpressions ){
        	switch( action.leave( this ) ){
        		case ASTVisitor.PROCESS_ABORT : return false;
        		case ASTVisitor.PROCESS_SKIP  : return true;
        		default : break;
        	}
        }
        return true;
    }

    public void replace(IASTNode child, IASTNode other) {
        if( child == condition )
        {
            other.setPropertyInParent( child.getPropertyInParent() );
            other.setParent( child.getParent() );
            condition  = (IASTExpression) other;
        }
        if( child == postive )
        {
            other.setPropertyInParent( child.getPropertyInParent() );
            other.setParent( child.getParent() );
            postive  = (IASTExpression) other;
        }
        if( child == negative )
        {
            other.setPropertyInParent( child.getPropertyInParent() );
            other.setParent( child.getParent() );
            negative  = (IASTExpression) other;
        }
    }
    
    public IType getExpressionType() {
    	return CPPVisitor.getExpressionType(this);
    }
    
}
