/*******************************************************************************
 * Copyright (c) 2005, 2011 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 Rational Software - Initial API and implementation
 * Yuan Zhang / Beth Tibbitts (IBM Research)
 *******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.c;

import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTExpression;
import org.eclipse.cdt.core.dom.ast.IASTExpressionStatement;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.internal.core.dom.parser.ASTNode;
import org.eclipse.cdt.internal.core.dom.parser.IASTAmbiguityParent;

/**
 * @author jcamelon
 */
public class CASTExpressionStatement extends ASTNode implements
        IASTExpressionStatement, IASTAmbiguityParent {

    private IASTExpression expression;


    public CASTExpressionStatement() {
	}

	public CASTExpressionStatement(IASTExpression expression) {
		setExpression(expression);
	}

	public CASTExpressionStatement copy() {
		return copy(CopyStyle.withoutLocations);
	}

	public CASTExpressionStatement copy(CopyStyle style) {
		CASTExpressionStatement copy = new CASTExpressionStatement();
		copy.setExpression(expression == null ? null : expression.copy(style));
		copy.setOffsetAndLength(this);
		if (style == CopyStyle.withLocations) {
			copy.setCopyLocation(this);
		}
		return copy;
	}
	
	public IASTExpression getExpression() {
        return expression;
    }

    public void setExpression(IASTExpression expression) {
        assertNotFrozen();
        this.expression = expression;
        if (expression != null) {
			expression.setParent(this);
			expression.setPropertyInParent(EXPRESSION);
		}
    }

    @Override
	public boolean accept(ASTVisitor action) {
        if (action.shouldVisitStatements) {
            switch (action.visit(this)) {
            case ASTVisitor.PROCESS_ABORT:
                return false;
            case ASTVisitor.PROCESS_SKIP:
                return true;
            default:
                break;
            }
        }
        if (expression != null)
            if (!expression.accept(action))
                return false;

        if (action.shouldVisitStatements) {
            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 == expression) {
            other.setPropertyInParent(child.getPropertyInParent());
            other.setParent(child.getParent());
            expression = (IASTExpression) other;
        }
    }

}
