org.jfree.chart.labels.SymbolicXYItemLabelGenerator Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jfreechart Show documentation
Show all versions of jfreechart Show documentation
JFreeChart is a class library, written in Java, for generating charts.
Utilising the Java2D APIs, it currently supports bar charts, pie charts,
line charts, XY-plots and time series plots.
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2013, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* ---------------------------------
* SymbolicXYItemLabelGenerator.java
* ---------------------------------
* (C) Copyright 2001-2008, by Anthony Boulestreau and Contributors.
*
* Original Author: Anthony Boulestreau;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
* Changes
* -------
* 29-Mar-2002 : Version 1, contributed by Anthony Boulestreau (DG);
* 26-Sep-2002 : Fixed errors reported by Checkstyle (DG);
* 23-Mar-2003 : Implemented Serializable (DG);
* 13-Aug-2003 : Implemented Cloneable (DG);
* 17-Nov-2003 : Implemented PublicCloneable (DG);
* 25-Feb-2004 : Renamed XYToolTipGenerator --> XYItemLabelGenerator (DG);
* 19-Jan-2005 : Now accesses primitives only from dataset (DG);
* 20-Apr-2005 : Renamed XYLabelGenerator --> XYItemLabelGenerator (DG);
* 02-Feb-2007 : Removed author tags all over JFreeChart sources (DG);
* 31-Mar-2008 : Added hashCode() method to appease FindBugs (DG);
*
*/
package org.jfree.chart.labels;
import java.io.Serializable;
import org.jfree.data.time.RegularTimePeriod;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XisSymbolic;
import org.jfree.data.xy.YisSymbolic;
import org.jfree.util.PublicCloneable;
/**
* A standard item label generator for plots that use data from an
* {@link XYDataset}.
*/
public class SymbolicXYItemLabelGenerator implements XYItemLabelGenerator,
XYToolTipGenerator, Cloneable, PublicCloneable, Serializable {
/** For serialization. */
private static final long serialVersionUID = 3963400354475494395L;
/**
* Generates a tool tip text item for a particular item within a series.
*
* @param data the dataset.
* @param series the series number (zero-based index).
* @param item the item number (zero-based index).
*
* @return The tool tip text (possibly null).
*/
@Override
public String generateToolTip(XYDataset data, int series, int item) {
String xStr, yStr;
if (data instanceof YisSymbolic) {
yStr = ((YisSymbolic) data).getYSymbolicValue(series, item);
}
else {
double y = data.getYValue(series, item);
yStr = Double.toString(round(y, 2));
}
if (data instanceof XisSymbolic) {
xStr = ((XisSymbolic) data).getXSymbolicValue(series, item);
}
else if (data instanceof TimeSeriesCollection) {
RegularTimePeriod p
= ((TimeSeriesCollection) data).getSeries(series)
.getTimePeriod(item);
xStr = p.toString();
}
else {
double x = data.getXValue(series, item);
xStr = Double.toString(round(x, 2));
}
return "X: " + xStr + ", Y: " + yStr;
}
/**
* Generates a label for the specified item. The label is typically a
* formatted version of the data value, but any text can be used.
*
* @param dataset the dataset (null not permitted).
* @param series the series index (zero-based).
* @param category the category index (zero-based).
*
* @return The label (possibly null).
*/
@Override
public String generateLabel(XYDataset dataset, int series, int category) {
return null; //TODO: implement this method properly
}
/**
* Round a double value.
*
* @param value the value.
* @param nb the exponent.
*
* @return The rounded value.
*/
private static double round(double value, int nb) {
if (nb <= 0) {
return Math.floor(value + 0.5d);
}
double p = Math.pow(10, nb);
double tempval = Math.floor(value * p + 0.5d);
return tempval / p;
}
/**
* Returns an independent copy of the generator.
*
* @return A clone.
*
* @throws CloneNotSupportedException if cloning is not supported.
*/
@Override
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
/**
* Tests if this object is equal to another.
*
* @param obj the other object.
*
* @return A boolean.
*/
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (obj instanceof SymbolicXYItemLabelGenerator) {
return true;
}
return false;
}
/**
* Returns a hash code for this instance.
*
* @return A hash code.
*/
@Override
public int hashCode() {
int result = 127;
return result;
}
}