/* 
 *  Copyright (C) 2000 - 2008 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.expression.function.struct;

import com.naryx.tagfusion.cfm.engine.cfArgStructData;
import com.naryx.tagfusion.cfm.engine.cfBooleanData;
import com.naryx.tagfusion.cfm.engine.cfData;
import com.naryx.tagfusion.cfm.engine.cfJavaObjectData;
import com.naryx.tagfusion.cfm.engine.cfQueryResultData;
import com.naryx.tagfusion.cfm.engine.cfSession;
import com.naryx.tagfusion.cfm.engine.cfStructData;
import com.naryx.tagfusion.cfm.engine.cfmRunTimeException;
import com.naryx.tagfusion.cfm.parser.CFUndefinedValue;
import com.naryx.tagfusion.expression.function.functionBase;

public class structKeyExists extends functionBase {
	private static final long serialVersionUID = 1L;

	public structKeyExists() {
		min = max = 2;
		setNamedParams( new String[]{ "struct", "key" } );
	}

	public String[] getParamInfo(){
		return new String[]{
			"struct1",
			"key"
		};
	}
	
	public java.util.Map getInfo(){
		return makeInfo(
				"structure", 
				"Determines whether the given key exists in the structure", 
				ReturnType.BOOLEAN );
	}
	
	public cfData execute(cfSession _session, cfArgStructData argStruct) throws cfmRunTimeException {

		cfData data = getNamedParam(argStruct, "struct");
		String key = getNamedStringParam(argStruct, "key", "");
		boolean result = false;

		if (data.getDataType() == cfData.CFQUERYRESULTDATA) {
			result = ((cfQueryResultData) data).getColumnIndexCF(key) > 0;
		} else if (data.isStruct()) {
			result = ((cfStructData) data).containsKey(key);
			if (result) {
				cfData value = ((cfStructData) data).getData(key);
				result = ((value != null) && (value != CFUndefinedValue.UNDEFINED));
			}
		} else if (data.getDataType() == cfData.CFJAVAOBJECTDATA) {
			try {
				((cfJavaObjectData) data).getJavaData(key);
				result = true;
			} catch (cfmRunTimeException e) {
				result = false;
			}
		} else {
			throwException(_session, "Parameter isn't of type STRUCTURE");
		}

		return cfBooleanData.getcfBooleanData(result);
	}
}