/* 
 *  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.cfSession;
import com.naryx.tagfusion.cfm.engine.cfStructData;
import com.naryx.tagfusion.cfm.engine.cfmRunTimeException;
import com.naryx.tagfusion.cfm.xml.cfXmlData;
import com.naryx.tagfusion.expression.function.functionBase;

public class structAppend extends functionBase {

	private static final long serialVersionUID = 1L;

	public structAppend() {
		min = 2;
		max = 3;
		setNamedParams( new String[]{ "struct1", "struct2", "overwrite" } );
	}

	public String[] getParamInfo(){
		return new String[]{
			"struct1",
			"struct2",
			"overwrite - default true"
		};
	}
	
	public java.util.Map getInfo(){
		return makeInfo(
				"structure", 
				"Appends all the data from struct2 into struct1, replacing duplicate keys unless specified by the overwrite flag", 
				ReturnType.BOOLEAN );
	}

	public cfData execute(cfSession _session, cfArgStructData argStruct) throws cfmRunTimeException {
		cfData struct1;
		cfData struct2;
		cfData valueData;
		String key;
		boolean overwrite = true;

		struct1 = getNamedParam(argStruct, "struct1");
		struct2 = getNamedParam(argStruct, "struct2");

		if (!struct2.isStruct() || !struct1.isStruct())
			throwException(_session, "Parameter isn't of type STRUCTURE");

		overwrite = getNamedBooleanParam(argStruct, "overwrite", true);
		
		// --[ Do the actual appending
		// Handle the situation if both structs are cfXmlData
		if (struct1 instanceof cfXmlData && struct2 instanceof cfXmlData) {
			((cfXmlData) struct1).importXml((cfXmlData) struct2, overwrite);
		} else {
			cfStructData struct = (cfStructData) struct1;
			cfStructData structToAppend = (cfStructData) struct2;

			Object[] keys = structToAppend.keys();

			for (int i = 0; i < keys.length; i++) {
				key = (String) keys[i];
				valueData = structToAppend.getData(key);

				if (overwrite)
					((cfStructData) struct).setData(key, valueData);
				else {
					if (!struct.containsKey(key))
						((cfStructData) struct).setData(key, valueData);
				}
			}
		}
		return cfBooleanData.TRUE;
	}
}