/*******************************************************************************
 * Copyright (c) 2004, 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 - 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.IASTCompoundStatement;
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.ICPPScope;
import org.eclipse.cdt.core.parser.util.ArrayUtil;
import org.eclipse.cdt.internal.core.dom.parser.ASTNode;
import org.eclipse.cdt.internal.core.dom.parser.IASTAmbiguityParent;

/**
 * @author jcamelon
 */
public class CPPASTCompoundStatement extends ASTNode implements
        IASTCompoundStatement, IASTAmbiguityParent {

    private IASTStatement [] statements = new IASTStatement[2];
    private ICPPScope scope = null;

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

	public CPPASTCompoundStatement copy(CopyStyle style) {
		CPPASTCompoundStatement copy = new CPPASTCompoundStatement();
		for (IASTStatement statement : getStatements())
			copy.addStatement(statement == null ? null : statement.copy(style));
		copy.setOffsetAndLength(this);
		if (style == CopyStyle.withLocations) {
			copy.setCopyLocation(this);
		}
		return copy;
	}

    public IASTStatement[] getStatements() {
        if( statements == null ) return IASTStatement.EMPTY_STATEMENT_ARRAY;
        return (IASTStatement[]) ArrayUtil.trim( IASTStatement.class, statements );
    }

    public void addStatement(IASTStatement statement) {
        assertNotFrozen();
        statements = (IASTStatement[]) ArrayUtil.append( IASTStatement.class, statements, statement );
        if (statement != null) {
			statement.setParent(this);
			statement.setPropertyInParent(NESTED_STATEMENT);
		}
    }

    public IScope getScope() {
    	if( scope == null )
    		scope = new CPPBlockScope( this );
        return scope;
    }

    @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;
	        }
		}
        IASTStatement [] s = getStatements();
        for ( int i = 0; i < s.length; i++ ) {
            if( !s[i].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( statements == null ) return;
        for( int i = 0; i < statements.length; ++i )
        {
            if( statements[i] == child )
            {
                other.setParent( statements[i].getParent() );
                other.setPropertyInParent( statements[i].getPropertyInParent() );
                statements[i] = (IASTStatement) other;
            }
        }
    }
}