/*******************************************************************************
 * 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.IASTDeclaration;
import org.eclipse.cdt.core.dom.ast.IASTExpression;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTStatement;
import org.eclipse.cdt.core.dom.ast.IScope;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTIfStatement;
import org.eclipse.cdt.internal.core.dom.parser.IASTAmbiguityParent;

/**
 * @author jcamelon
 */
public class CPPASTIfStatement extends CPPASTNode implements ICPPASTIfStatement, IASTAmbiguityParent {
	
    private IASTExpression condition;
    private IASTStatement thenClause;
    private IASTStatement elseClause;
    private IASTDeclaration condDecl;
    private IScope scope;
    
    
    public CPPASTIfStatement() {
	}

	public CPPASTIfStatement(IASTDeclaration condition, IASTStatement thenClause, IASTStatement elseClause) {
		setConditionDeclaration(condition);
		setThenClause(thenClause);
		setElseClause(elseClause);
	}
    
    public CPPASTIfStatement(IASTExpression condition, IASTStatement thenClause, IASTStatement elseClause) {
		setConditionExpression(condition);
		setThenClause(thenClause);
		setElseClause(elseClause);
	}

	public IASTExpression getConditionExpression() {
        return condition;
    }

    public void setConditionExpression(IASTExpression condition) {
        this.condition = condition;
        if (condition != null) {
			condition.setParent(this);
			condition.setPropertyInParent(CONDITION);
		}
    }

    public IASTStatement getThenClause() {
        return thenClause;
    }

    public void setThenClause(IASTStatement thenClause) {
        this.thenClause = thenClause;
        if (thenClause != null) {
			thenClause.setParent(this);
			thenClause.setPropertyInParent(THEN);
		}
    }

    public IASTStatement getElseClause() {
        return elseClause;
    }

    public void setElseClause(IASTStatement elseClause) {
        this.elseClause = elseClause;
        if (elseClause != null) {
			elseClause.setParent(this);
			elseClause.setPropertyInParent(ELSE);
		} 
    }

    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( condition != null ) if( !condition.accept( action ) ) return false;
        if( condDecl != null )  if( !condDecl.accept( action )) return false;
        if( thenClause != null ) if( !thenClause.accept( action ) ) return false;
        if( elseClause != null ) if( !elseClause.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( thenClause == child )
        {
            other.setParent( child.getParent() );
            other.setPropertyInParent( child.getPropertyInParent() );
            thenClause = (IASTStatement) other;
        }
        else if( elseClause == child )
        {
            other.setParent( child.getParent() );
            other.setPropertyInParent( child.getPropertyInParent() );
            elseClause = (IASTStatement) other;            
        }
        if( condDecl == child )
        {
            other.setParent( child.getParent() );
            other.setPropertyInParent( child.getPropertyInParent() );
            condDecl = (IASTDeclaration) other;
        }
    }

    public IASTDeclaration getConditionDeclaration() {
        return condDecl;
    }

    public void setConditionDeclaration(IASTDeclaration d) {
        condDecl = d;
        if (d != null) {
			d.setParent(this);
			d.setPropertyInParent(CONDITION);
		}
    }
    
	public IScope getScope() {
		if( scope == null )
            scope = new CPPBlockScope( this );
        return scope;	
    }
}
