/* 
 *  Copyright (C) 2000 - 2010 TagServlet Ltd
 *
 *  This file is part of Open BlueDragon (OpenBD) CFML Server Engine.
 *  
 *  OpenBD is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  Free Software Foundation,version 3.
 *  
 *  OpenBD is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License
 *  along with OpenBD.  If not, see http://www.gnu.org/licenses/
 *  
 *  Additional permission under GNU GPL version 3 section 7
 *  
 *  If you modify this Program, or any covered work, by linking or combining 
 *  it with any of the JARS listed in the README.txt (or a modified version of 
 *  (that library), containing parts covered by the terms of that JAR, the 
 *  licensors of this Program grant you additional permission to convey the 
 *  resulting work. 
 *  README.txt @ http://www.openbluedragon.org/license/README.txt
 *  
 *  http://www.openbluedragon.org/
 */
package com.naryx.tagfusion.cfm.parser.script;

import org.antlr.runtime.Token;

import com.naryx.tagfusion.cfm.engine.cfmRunTimeException;
import com.naryx.tagfusion.cfm.parser.CFContext;
import com.naryx.tagfusion.cfm.parser.CFExpression;
import com.naryx.tagfusion.cfm.tag.cfTag;

public class CFWhileStatement extends CFParsedStatement implements java.io.Serializable {

	private static final long serialVersionUID = 1L;
	private CFExpression cond;
	private CFScriptStatement body;

	public CFWhileStatement( Token t, CFExpression _cond, CFScriptStatement _body ) {
		super(t);
		cond = _cond;
		body = _body;
	}

	public void setHostTag( cfTag _parentTag ){
		super.setHostTag(_parentTag);
		body.setHostTag(_parentTag);
	}
	
	public void checkIndirectAssignments( String[] scriptSource ) {
		body.checkIndirectAssignments(scriptSource);
	}

	public CFStatementResult Exec( CFContext context ) throws cfmRunTimeException {
		setLineCol(context);
		
		while ( fullyEvaluate( cond, context ).getBoolean() ) {
			CFStatementResult result = body.Exec(context);
			if ( result != null ) {
				if ( result.isBreak() ) {
					break;
				} else if ( result.isContinue() ) {
					continue;
				}
				return result;
			}
		}
		return null;
	}

	public String Decompile( int indent ) {
		StringBuilder sb = new StringBuilder();
		sb.append( Indent( indent ) );
		sb.append( "while(" );
		sb.append( cond.Decompile( indent ) );
		sb.append( " ) " );
		sb.append( body.Decompile(indent + 2) );
		return sb.toString();
	}

}