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.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 ItemPriceComparator extends OrderByComparator<ShoppingItem> {
025    
026            public static final String ORDER_BY_ASC =
027                    "ShoppingItem.categoryId ASC, ShoppingItem.price ASC, " +
028                            "ShoppingItem.name ASC";
029    
030            public static final String ORDER_BY_DESC =
031                    "ShoppingItem.categoryId DESC, ShoppingItem.price DESC, " +
032                            "ShoppingItem.name DESC";
033    
034            public static final String[] ORDER_BY_FIELDS =
035                    {"categoryId", "price", "name"};
036    
037            public ItemPriceComparator() {
038                    this(false);
039            }
040    
041            public ItemPriceComparator(boolean ascending) {
042                    _ascending = ascending;
043            }
044    
045            @Override
046            public int compare(ShoppingItem item1, ShoppingItem item2) {
047                    Long categoryId1 = new Long(item1.getCategoryId());
048                    Long categoryId2 = new Long(item2.getCategoryId());
049    
050                    int value = categoryId1.compareTo(categoryId2);
051    
052                    if (value == 0) {
053                            double price1 = (1 - item1.getDiscount()) * item1.getPrice();
054                            double price2 = (1 - item2.getDiscount()) * item2.getPrice();
055    
056                            if (price1 < price2) {
057                                    value = -1;
058                            }
059                            else if (price1 > price2) {
060                                    value = 1;
061                            }
062                    }
063    
064                    if (value == 0) {
065                            String name1 = StringUtil.toLowerCase(item1.getName());
066                            String name2 = StringUtil.toLowerCase(item2.getName());
067    
068                            value = name1.compareTo(name2);
069                    }
070    
071                    if (_ascending) {
072                            return value;
073                    }
074                    else {
075                            return -value;
076                    }
077            }
078    
079            @Override
080            public String getOrderBy() {
081                    if (_ascending) {
082                            return ORDER_BY_ASC;
083                    }
084                    else {
085                            return ORDER_BY_DESC;
086                    }
087            }
088    
089            @Override
090            public String[] getOrderByFields() {
091                    return ORDER_BY_FIELDS;
092            }
093    
094            @Override
095            public boolean isAscending() {
096                    return _ascending;
097            }
098    
099            private final boolean _ascending;
100    
101    }