Java tutorial
/* * Copyright (C) 2000 - 2008 TagServlet Ltd * * This file is part of Open BlueDragon (OpenBD) CFML Server Engine. * * OpenBD is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * Free Software Foundation,version 3. * * OpenBD is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with OpenBD. If not, see http://www.gnu.org/licenses/ * * Additional permission under GNU GPL version 3 section 7 * * If you modify this Program, or any covered work, by linking or combining * it with any of the JARS listed in the README.txt (or a modified version of * (that library), containing parts covered by the terms of that JAR, the * licensors of this Program grant you additional permission to convey the * resulting work. * README.txt @ http://www.openbluedragon.org/license/README.txt * * http://www.openbluedragon.org/ */ package com.newatlanta.bluedragon; import java.io.Serializable; import java.text.DateFormat; import java.text.NumberFormat; import java.util.Date; import org.jfree.chart.labels.StandardXYItemLabelGenerator; import org.jfree.data.xy.XYDataset; import org.jfree.util.PublicCloneable; /** * A standard item label generator for plots that use data from an * {@link org.jfree.data.xy.XYDataset}. */ public class XYItemLabelGenerator extends StandardXYItemLabelGenerator implements org.jfree.chart.labels.XYItemLabelGenerator, Cloneable, PublicCloneable, Serializable { /** For serialization. */ private static final long serialVersionUID = 7807668053171837925L; /** The default item label format. */ public static final String DEFAULT_ITEM_LABEL_FORMAT = "{2}"; /** * Creates an item label generator using default number formatters. */ public XYItemLabelGenerator() { this(DEFAULT_ITEM_LABEL_FORMAT, NumberFormat.getNumberInstance(), NumberFormat.getNumberInstance()); } /** * Creates an item label generator using the specified number formatters. * * @param formatString the item label format string (<code>null</code> not * permitted). * @param xFormat the format object for the x values (<code>null</code> * not permitted). * @param yFormat the format object for the y values (<code>null</code> * not permitted). */ public XYItemLabelGenerator(String formatString, NumberFormat xFormat, NumberFormat yFormat) { super(formatString, xFormat, yFormat); } /** * Creates an item label generator using the specified number formatters. * * @param formatString the item label format string (<code>null</code> * not permitted). * @param xFormat the format object for the x values (<code>null</code> * not permitted). * @param yFormat the format object for the y values (<code>null</code> * not permitted). */ public XYItemLabelGenerator(String formatString, DateFormat xFormat, NumberFormat yFormat) { super(formatString, xFormat, yFormat); } /** * Creates a label generator using the specified date formatters. * * @param formatString the label format string (<code>null</code> not * permitted). * @param xFormat the format object for the x values (<code>null</code> * not permitted). * @param yFormat the format object for the y values (<code>null</code> * not permitted). */ public XYItemLabelGenerator(String formatString, DateFormat xFormat, DateFormat yFormat) { super(formatString, xFormat, yFormat); } /** * Generates the item label text for an item in a dataset. * * @param dataset the dataset (<code>null</code> not permitted). * @param series the series index (zero-based). * @param item the item index (zero-based). * * @return The label text (possibly <code>null</code>). */ public String generateLabel(XYDataset dataset, int series, int item) { return generateLabelString(dataset, series, item); } /** * Returns an independent copy of the generator. * * @return A clone. * * @throws CloneNotSupportedException if cloning is not supported. */ public Object clone() throws CloneNotSupportedException { return super.clone(); } /** * Tests this object for equality with an arbitrary object. * * @param obj the other object (<code>null</code> permitted). * * @return A boolean. */ public boolean equals(Object obj) { if (obj == this) { return true; } if (obj instanceof StandardXYItemLabelGenerator) { return super.equals(obj); } return false; } protected Object[] createItemArray(XYDataset dataset, int series, int item) { Object[] result = new Object[5]; result[0] = dataset.getSeriesKey(series).toString(); double x = dataset.getXValue(series, item); if (Double.isNaN(x) && dataset.getX(series, item) == null) { result[1] = "null"; //this.nullXString; } else { if (this.getXDateFormat() != null) { result[1] = this.getXDateFormat().format(new Date((long) x)); } else { result[1] = this.getXFormat().format(x); } } double y = dataset.getYValue(series, item); if (Double.isNaN(y) && dataset.getY(series, item) == null) { result[2] = "null"; //this.nullYString; } else { if (this.getYDateFormat() != null) { result[2] = this.getYDateFormat().format(new Date((long) y)); } else { result[2] = this.getYFormat().format(y); } double total = calculateYTotal(dataset, series); double percent = y / total; result[3] = NumberFormat.getPercentInstance().format(percent); if (this.getYFormat() != null) { result[4] = this.getYFormat().format(total); } else if (this.getYDateFormat() != null) { //result[4] = this.getDateFormat().format(total); } } return result; } private static double calculateYTotal(XYDataset dataset, int series) { double total = 0; int numItems = dataset.getItemCount(series); for (int i = 0; i < numItems; i++) total += dataset.getYValue(series, i); return total; } }