OperatorConstants.java

/**
 * Copyright (c) 2011, SOCIETIES Consortium (WATERFORD INSTITUTE OF TECHNOLOGY (TSSG), HERIOT-WATT UNIVERSITY (HWU), SOLUTA.NET 
 * (SN), GERMAN AEROSPACE CENTRE (Deutsches Zentrum fuer Luft- und Raumfahrt e.V.) (DLR), Zavod za varnostne tehnologije
 * informacijske družbe in elektronsko poslovanje (SETCCE), INSTITUTE OF COMMUNICATION AND COMPUTER SYSTEMS (ICCS), LAKE
 * COMMUNICATIONS (LAKE), INTEL PERFORMANCE LEARNING SOLUTIONS LTD (INTEL), PORTUGAL TELECOM INOVAÇÃO, SA (PTIN), IBM Corp., 
 * INSTITUT TELECOM (ITSUD), AMITEC DIACHYTI EFYIA PLIROFORIKI KAI EPIKINONIES ETERIA PERIORISMENIS EFTHINIS (AMITEC), TELECOM 
 * ITALIA S.p.a.(TI),  TRIALOG (TRIALOG), Stiftelsen SINTEF (SINTEF), NEC EUROPE LTD (NEC))
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
 * conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
 * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.societies.personalisation.preference.api.model;

/**
 * Enum class used to define the operators used in the {@link
 * IPreferenceCondition}
 *
 * @author Elizabeth
 * @version 1.0
 * @created 08-Nov-2011 14:02:57
 */
public enum OperatorConstants {

    EQUALS("=", "equals"),
    GREATER_THAN(">", "greater than"),
    GREATER_OR_EQUAL_THAN(">=", "greater than or equal"),
    LESS_THAN("<", "less than"),
    LESS_OR_EQUAL_THAN("<=", "less than or equal");

    private final String op;
    private final String description;

    OperatorConstants(String op, String description) {
        this.op = op;
        this.description = description;
    }

    public static OperatorConstants fromString(String str) {
        for (OperatorConstants oc : OperatorConstants.values()) {
            if (oc.getOperation().equals(str)) {
                return oc;
            }
        }

        return null;

//        if (str.equalsIgnoreCase("=")) {
//            return EQUALS;
//        }
//
//        if (str.equals(">")) {
//            return GREATER_THAN;
//        }
//
//        if (str.equals(">=")) {
//            return GREATER_OR_EQUAL_THAN;
//        }
//
//        if (str.equals("<")) {
//            return LESS_THAN;
//        }
//
//        if (str.equals("<=")) {
//            return LESS_OR_EQUAL_THAN;
//        }
//
//        return EQUALS;
    }

    public String getOperation() {
        return op;
    }

    public String getDescription() {
        return description;
    }
}