001    /**
002     * Copyright (c) 2000-2013 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 extends OrderByComparator {
024    
025            public static final String ORDER_BY_ASC =
026                    "MDRRuleGroupInstance.priority ASC";
027    
028            public static final String ORDER_BY_DESC =
029                    "MDRRuleGroupInstance.priority DESC";
030    
031            public static final String[] ORDER_BY_FIELDS = {"priority"};
032    
033            public RuleGroupInstancePriorityComparator() {
034                    this(true);
035            }
036    
037            public RuleGroupInstancePriorityComparator(boolean ascending) {
038                    _ascending = ascending;
039            }
040    
041            @Override
042            public int compare(Object obj1, Object obj2) {
043                    MDRRuleGroupInstance ruleGroupInstance1 = (MDRRuleGroupInstance)obj1;
044                    MDRRuleGroupInstance ruleGroupInstance2 = (MDRRuleGroupInstance)obj2;
045    
046                    int value =
047                            ruleGroupInstance2.getPriority() - ruleGroupInstance1.getPriority();
048    
049                    if (_ascending) {
050                            return value;
051                    }
052                    else {
053                            return -value;
054                    }
055            }
056    
057            @Override
058            public String getOrderBy() {
059                    if (_ascending) {
060                            return ORDER_BY_ASC;
061                    }
062                    else {
063                            return ORDER_BY_DESC;
064                    }
065            }
066    
067            @Override
068            public String[] getOrderByFields() {
069                    return ORDER_BY_FIELDS;
070            }
071    
072            @Override
073            public boolean isAscending() {
074                    return _ascending;
075            }
076    
077            private boolean _ascending;
078    
079    }