Operators.java

/**
 *  Catroid: An on-device visual programming system for Android devices
 *  Copyright (C) 2010-2014 The Catrobat Team
 *  (<http://developer.catrobat.org/credits>)
 *  
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as
 *  published by the Free Software Foundation, either version 3 of the
 *  License, or (at your option) any later version.
 *  
 *  An additional term exception under section 7 of the GNU Affero
 *  General Public License, version 3, is available at
 *  http://developer.catrobat.org/license_additional_term
 *  
 *  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 Affero General Public License for more details.
 *  
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.catrobat.html5player.client.formulaeditor;

public enum Operators {
	LOGICAL_AND(2, true), LOGICAL_OR(1, true), EQUAL(3, true), NOT_EQUAL(4, true), SMALLER_OR_EQUAL(4, true), GREATER_OR_EQUAL(
			4, true), SMALLER_THAN(4, true), GREATER_THAN(4, true), PLUS(5), MINUS(5), MULT(6), DIVIDE(6), MOD(6), POW(
			7), LOGICAL_NOT(4, true);

	private final Integer priority;
	public final boolean isLogicalOperator;

	Operators(Integer priority) {
		this.priority = priority;
		isLogicalOperator = false;
	}

	Operators(Integer priority, boolean isLogical) {
		this.priority = priority;
		isLogicalOperator = isLogical;
	}

	public int compareOperatorTo(Operators op) {
		int returnVa = 0;
		if (priority > op.priority) {
			returnVa = 1;
		} else if (priority == op.priority) {
			returnVa = 0;
		} else if (priority < op.priority) {
			returnVa = -1;
		}

		return returnVa;
	}

	public static Operators getOperatorByValue(String value) {
		try {
			return valueOf(value);
		} catch (IllegalArgumentException exception) {

		}
		return null;
	}

	public static boolean isOperator(String value) {
		if (getOperatorByValue(value) == null) {
			return false;
		}

		return true;
	}

}