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