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.shopping.util.comparator;
016    
017    import com.liferay.portal.kernel.util.OrderByComparator;
018    import com.liferay.portal.kernel.util.StringUtil;
019    import com.liferay.portlet.shopping.model.ShoppingItem;
020    
021    /**
022     * @author Brian Wing Shun Chan
023     */
024    public class ItemMinQuantityComparator extends OrderByComparator {
025    
026            public static final String ORDER_BY_ASC =
027                    "ShoppingItem.categoryId ASC, ShoppingItem.minQuantity ASC, " +
028                            "ShoppingItem.name ASC";
029    
030            public static final String ORDER_BY_DESC =
031                    "ShoppingItem.categoryId DESC, ShoppingItem.minQuantity DESC, " +
032                            "ShoppingItem.name DESC";
033    
034            public static final String[] ORDER_BY_FIELDS = {
035                    "categoryId", "minQuantity", "name"
036            };
037    
038            public ItemMinQuantityComparator() {
039                    this(false);
040            }
041    
042            public ItemMinQuantityComparator(boolean ascending) {
043                    _ascending = ascending;
044            }
045    
046            @Override
047            public int compare(Object obj1, Object obj2) {
048                    ShoppingItem item1 = (ShoppingItem)obj1;
049                    ShoppingItem item2 = (ShoppingItem)obj2;
050    
051                    Long categoryId1 = new Long(item1.getCategoryId());
052                    Long categoryId2 = new Long(item2.getCategoryId());
053    
054                    int value = categoryId1.compareTo(categoryId2);
055    
056                    if (value == 0) {
057                            if (item1.getMinQuantity() < item2.getMinQuantity()) {
058                                    value = -1;
059                            }
060                            else if (item1.getMinQuantity() > item2.getMinQuantity()) {
061                                    value = 1;
062                            }
063                    }
064    
065                    if (value == 0) {
066                            String name1 = StringUtil.toLowerCase(item1.getName());
067                            String name2 = StringUtil.toLowerCase(item2.getName());
068    
069                            value = name1.compareTo(name2);
070                    }
071    
072                    if (_ascending) {
073                            return value;
074                    }
075                    else {
076                            return -value;
077                    }
078            }
079    
080            @Override
081            public String getOrderBy() {
082                    if (_ascending) {
083                            return ORDER_BY_ASC;
084                    }
085                    else {
086                            return ORDER_BY_DESC;
087                    }
088            }
089    
090            @Override
091            public String[] getOrderByFields() {
092                    return ORDER_BY_FIELDS;
093            }
094    
095            @Override
096            public boolean isAscending() {
097                    return _ascending;
098            }
099    
100            private boolean _ascending;
101    
102    }