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/**
 * COOS - Connected Objects Operating System (www.connectedobjects.org).
 *
 * Copyright (C) 2009 Telenor ASA and Tellu AS. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see .
 *
 * You may also contact one of the following for additional information:
 * Telenor ASA, Snaroyveien 30, N-1331 Fornebu, Norway (www.telenor.no)
 * Tellu AS, Hagalokkveien 13, N-1383 Asker, Norway (www.tellu.no)
 */
package org.coos.messaging;

/**
 * 
 * @author Knut Eilif Husa, Tellu AS Operator class
 */
public class Op {

	/** equality operator */
	public static final short EQ = 1;
	/** less than operator */
	public static final short LT = 2;
	/** greater than operator */
	public static final short GT = 3;
	/** greater o equal operator */
	public static final short GE = 4;
	/** less or equal operator */
	public static final short LE = 5;

	public static final short PF = 6;

	public static final short SF = 7;
	/** any operator */
	public static final short ANY = 8;
	/** not equal operator */
	public static final short NE = 9;

	public static final short SS = 10;

	/** string representation of operators */
	public static final String operators[] = { null, "=", "<", ">", ">=", "<=", ">*", "*<", "any", "!=", "*" };

	/**
	 * returns the operator corresponding to the given string representation.
	 * 
	 * @param strop
	 *            string representation of the operator (e.g. "=" returns
	 *            Operator.EQ)
	 * @return operator code or 0 if the string is not a valid representation
	 **/
	public static short op(String strop) {
		for (short i = 1; i < operators.length; ++i)
			if (operators[i].equals(strop))
				return i;
		return 0;
	}

}