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 ItemPriceComparator extends OrderByComparator {
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(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                            double price1 = (1 - item1.getDiscount()) * item1.getPrice();
057                            double price2 = (1 - item2.getDiscount()) * item2.getPrice();
058    
059                            if (price1 < price2) {
060                                    value = -1;
061                            }
062                            else if (price1 > price2) {
063                                    value = 1;
064                            }
065                    }
066    
067                    if (value == 0) {
068                            value = StringUtil.toLowerCase(item1.getName()).compareTo(
069                                    StringUtil.toLowerCase(item2.getName()));
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    }