001/* =========================================================== 002 * JFreeChart : a free chart library for the Java(tm) platform 003 * =========================================================== 004 * 005 * (C) Copyright 2000-2013, by Object Refinery Limited and Contributors. 006 * 007 * Project Info: http://www.jfree.org/jfreechart/index.html 008 * 009 * This library is free software; you can redistribute it and/or modify it 010 * under the terms of the GNU Lesser General Public License as published by 011 * the Free Software Foundation; either version 2.1 of the License, or 012 * (at your option) any later version. 013 * 014 * This library is distributed in the hope that it will be useful, but 015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 017 * License for more details. 018 * 019 * You should have received a copy of the GNU Lesser General Public 020 * License along with this library; if not, write to the Free Software 021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 022 * USA. 023 * 024 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 025 * Other names may be trademarks of their respective owners.] 026 * 027 * -------------------------- 028 * CategorySeriesHandler.java 029 * -------------------------- 030 * (C) Copyright 2003-2008, by Object Refinery Limited and Contributors. 031 * 032 * Original Author: David Gilbert (for Object Refinery Limited); 033 * Contributor(s): -; 034 * 035 * Changes 036 * ------- 037 * 23-Jan-2003 : Version 1 (DG); 038 * 039 */ 040 041package org.jfree.data.xml; 042 043import java.util.Iterator; 044 045import org.jfree.data.DefaultKeyedValues; 046import org.xml.sax.Attributes; 047import org.xml.sax.SAXException; 048import org.xml.sax.helpers.DefaultHandler; 049 050/** 051 * A handler for reading a series for a category dataset. 052 */ 053public class CategorySeriesHandler extends DefaultHandler 054 implements DatasetTags { 055 056 /** The root handler. */ 057 private RootHandler root; 058 059 /** The series key. */ 060 private Comparable seriesKey; 061 062 /** The values. */ 063 private DefaultKeyedValues values; 064 065 /** 066 * Creates a new item handler. 067 * 068 * @param root the root handler. 069 */ 070 public CategorySeriesHandler(RootHandler root) { 071 this.root = root; 072 this.values = new DefaultKeyedValues(); 073 } 074 075 /** 076 * Sets the series key. 077 * 078 * @param key the key. 079 */ 080 public void setSeriesKey(Comparable key) { 081 this.seriesKey = key; 082 } 083 084 /** 085 * Adds an item to the temporary storage for the series. 086 * 087 * @param key the key. 088 * @param value the value. 089 */ 090 public void addItem(Comparable key, final Number value) { 091 this.values.addValue(key, value); 092 } 093 094 /** 095 * The start of an element. 096 * 097 * @param namespaceURI the namespace. 098 * @param localName the element name. 099 * @param qName the element name. 100 * @param atts the attributes. 101 * 102 * @throws SAXException for errors. 103 */ 104 @Override 105 public void startElement(String namespaceURI, 106 String localName, 107 String qName, 108 Attributes atts) throws SAXException { 109 110 if (qName.equals(SERIES_TAG)) { 111 setSeriesKey(atts.getValue("name")); 112 ItemHandler subhandler = new ItemHandler(this.root, this); 113 this.root.pushSubHandler(subhandler); 114 } 115 else if (qName.equals(ITEM_TAG)) { 116 ItemHandler subhandler = new ItemHandler(this.root, this); 117 this.root.pushSubHandler(subhandler); 118 subhandler.startElement(namespaceURI, localName, qName, atts); 119 } 120 121 else { 122 throw new SAXException( 123 "Expecting <Series> or <Item> tag...found " + qName 124 ); 125 } 126 } 127 128 /** 129 * The end of an element. 130 * 131 * @param namespaceURI the namespace. 132 * @param localName the element name. 133 * @param qName the element name. 134 */ 135 @Override 136 public void endElement(String namespaceURI, 137 String localName, 138 String qName) { 139 140 if (this.root instanceof CategoryDatasetHandler) { 141 CategoryDatasetHandler handler = (CategoryDatasetHandler) this.root; 142 143 Iterator iterator = this.values.getKeys().iterator(); 144 while (iterator.hasNext()) { 145 Comparable key = (Comparable) iterator.next(); 146 Number value = this.values.getValue(key); 147 handler.addItem(this.seriesKey, key, value); 148 } 149 150 this.root.popSubHandler(); 151 } 152 153 } 154 155}