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1: /* =========================================================== 2: * JFreeChart : a free chart library for the Java(tm) platform 3: * =========================================================== 4: * 5: * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jfreechart/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * -------------------------- 28: * CategorySeriesHandler.java 29: * -------------------------- 30: * (C) Copyright 2003-2007, by Object Refinery Limited and Contributors. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited); 33: * Contributor(s): -; 34: * 35: * Changes 36: * ------- 37: * 23-Jan-2003 : Version 1 (DG); 38: * 39: */ 40: 41: package org.jfree.data.xml; 42: 43: import java.util.Iterator; 44: 45: import org.jfree.data.DefaultKeyedValues; 46: import org.xml.sax.Attributes; 47: import org.xml.sax.SAXException; 48: import org.xml.sax.helpers.DefaultHandler; 49: 50: /** 51: * A handler for reading a series for a category dataset. 52: */ 53: public class CategorySeriesHandler extends DefaultHandler 54: implements DatasetTags { 55: 56: /** The root handler. */ 57: private RootHandler root; 58: 59: /** The series key. */ 60: private Comparable seriesKey; 61: 62: /** The values. */ 63: private DefaultKeyedValues values; 64: 65: /** 66: * Creates a new item handler. 67: * 68: * @param root the root handler. 69: */ 70: public CategorySeriesHandler(RootHandler root) { 71: this.root = root; 72: this.values = new DefaultKeyedValues(); 73: } 74: 75: /** 76: * Sets the series key. 77: * 78: * @param key the key. 79: */ 80: public void setSeriesKey(Comparable key) { 81: this.seriesKey = key; 82: } 83: 84: /** 85: * Adds an item to the temporary storage for the series. 86: * 87: * @param key the key. 88: * @param value the value. 89: */ 90: public void addItem(Comparable key, final Number value) { 91: this.values.addValue(key, value); 92: } 93: 94: /** 95: * The start of an element. 96: * 97: * @param namespaceURI the namespace. 98: * @param localName the element name. 99: * @param qName the element name. 100: * @param atts the attributes. 101: * 102: * @throws SAXException for errors. 103: */ 104: public void startElement(String namespaceURI, 105: String localName, 106: String qName, 107: Attributes atts) throws SAXException { 108: 109: if (qName.equals(SERIES_TAG)) { 110: setSeriesKey(atts.getValue("name")); 111: ItemHandler subhandler = new ItemHandler(this.root, this); 112: this.root.pushSubHandler(subhandler); 113: } 114: else if (qName.equals(ITEM_TAG)) { 115: ItemHandler subhandler = new ItemHandler(this.root, this); 116: this.root.pushSubHandler(subhandler); 117: subhandler.startElement(namespaceURI, localName, qName, atts); 118: } 119: 120: else { 121: throw new SAXException( 122: "Expecting <Series> or <Item> tag...found " + qName 123: ); 124: } 125: } 126: 127: /** 128: * The end of an element. 129: * 130: * @param namespaceURI the namespace. 131: * @param localName the element name. 132: * @param qName the element name. 133: */ 134: public void endElement(String namespaceURI, 135: String localName, 136: String qName) { 137: 138: if (this.root instanceof CategoryDatasetHandler) { 139: CategoryDatasetHandler handler = (CategoryDatasetHandler) this.root; 140: 141: Iterator iterator = this.values.getKeys().iterator(); 142: while (iterator.hasNext()) { 143: Comparable key = (Comparable) iterator.next(); 144: Number value = this.values.getValue(key); 145: handler.addItem(this.seriesKey, key, value); 146: } 147: 148: this.root.popSubHandler(); 149: } 150: 151: } 152: 153: }