001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portlet.mobiledevicerules.util;
016    
017    import com.liferay.portal.kernel.util.OrderByComparator;
018    import com.liferay.portlet.mobiledevicerules.model.MDRRuleGroupInstance;
019    
020    /**
021     * @author Edward Han
022     */
023    public class RuleGroupInstancePriorityComparator
024            extends OrderByComparator<MDRRuleGroupInstance> {
025    
026            public static final String ORDER_BY_ASC =
027                    "MDRRuleGroupInstance.priority ASC";
028    
029            public static final String ORDER_BY_DESC =
030                    "MDRRuleGroupInstance.priority DESC";
031    
032            public static final String[] ORDER_BY_FIELDS = {"priority"};
033    
034            public RuleGroupInstancePriorityComparator() {
035                    this(true);
036            }
037    
038            public RuleGroupInstancePriorityComparator(boolean ascending) {
039                    _ascending = ascending;
040            }
041    
042            @Override
043            public int compare(
044                    MDRRuleGroupInstance ruleGroupInstance1,
045                    MDRRuleGroupInstance ruleGroupInstance2) {
046    
047                    int value =
048                            ruleGroupInstance2.getPriority() - ruleGroupInstance1.getPriority();
049    
050                    if (_ascending) {
051                            return value;
052                    }
053                    else {
054                            return -value;
055                    }
056            }
057    
058            @Override
059            public String getOrderBy() {
060                    if (_ascending) {
061                            return ORDER_BY_ASC;
062                    }
063                    else {
064                            return ORDER_BY_DESC;
065                    }
066            }
067    
068            @Override
069            public String[] getOrderByFields() {
070                    return ORDER_BY_FIELDS;
071            }
072    
073            @Override
074            public boolean isAscending() {
075                    return _ascending;
076            }
077    
078            private final boolean _ascending;
079    
080    }