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/*******************************************************************************
 * Copyright 2015 Defense Health Agency (DHA)
 *
 * If your use of this software does not include any GPLv2 components:
 * 	Licensed under the Apache License, Version 2.0 (the "License");
 * 	you may not use this file except in compliance with the License.
 * 	You may obtain a copy of the License at
 *
 * 	  http://www.apache.org/licenses/LICENSE-2.0
 *
 * 	Unless required by applicable law or agreed to in writing, software
 * 	distributed under the License is distributed on an "AS IS" BASIS,
 * 	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * 	See the License for the specific language governing permissions and
 * 	limitations under the License.
 * ----------------------------------------------------------------------------
 * If your use of this software includes any GPLv2 components:
 * 	This program is free software; you can redistribute it and/or
 * 	modify it under the terms of the GNU General Public License
 * 	as published by the Free Software Foundation; either version 2
 * 	of the License, or (at your option) any later version.
 *
 * 	This program 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.
 *******************************************************************************/
package prerna.util;

import java.util.Comparator;


/**
 * Used to compare two properties.
 */
public class PropComparator implements Comparator{

	/**
	 * Compares two properties.
	 * Checks whether they are equal to the name of a node, type of node, name of an edge, type of an edge, or URI based on the constants class.
	 * Returns -1 if first string equals one of the listed constants and 1 if the second string equals one of the listed constants.
	 * @param str1 String		First property to be compared.
	 * @param str2 String		Second property to be compared.
	
	 * @return int 				Returns -1, 0, or 1 */
	@Override
	public int compare(String str1, String str2) {
		if(str1.equals(Constants.VERTEX_NAME)) return -1;
		else if(str2.equals(Constants.VERTEX_NAME)) return 1;
		else if(str1.equals(Constants.VERTEX_TYPE)) return -1;
		else if(str2.equals(Constants.VERTEX_TYPE)) return 1;
		else if(str1.equals(Constants.EDGE_NAME)) return -1;
		else if(str2.equals(Constants.EDGE_NAME)) return 1;
		else if(str1.equals(Constants.EDGE_TYPE)) return -1;
		else if(str2.equals(Constants.EDGE_TYPE)) return 1;
		else if(str1.equals(Constants.URI)) return -1;
		else if(str2.equals(Constants.URI)) return 1;

		return str1.compareToIgnoreCase(str2);


	}
}