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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 2000-2020, 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.]
*
* -----------------------------------
* MultipleXYSeriesLabelGenerator.java
* -----------------------------------
* (C) Copyright 2004-2020, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
*/
package org.jfree.chart.labels;
import java.io.Serializable;
import java.text.MessageFormat;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.jfree.chart.HashUtils;
import org.jfree.chart.util.Args;
import org.jfree.chart.util.PublicCloneable;
import org.jfree.data.xy.XYDataset;
/**
* A series label generator for plots that use data from
* an {@link org.jfree.data.xy.XYDataset}.
*/
public class MultipleXYSeriesLabelGenerator implements XYSeriesLabelGenerator,
Cloneable, PublicCloneable, Serializable {
/** For serialization. */
private static final long serialVersionUID = 138976236941898560L;
/** The default item label format. */
public static final String DEFAULT_LABEL_FORMAT = "{0}";
/** The format pattern for the initial part of the label. */
private String formatPattern;
/** The format pattern for additional labels. */
private String additionalFormatPattern;
/** Storage for the additional series labels. */
private Map seriesLabelLists;
/**
* Creates an item label generator using default number formatters.
*/
public MultipleXYSeriesLabelGenerator() {
this(DEFAULT_LABEL_FORMAT);
}
/**
* Creates a new series label generator.
*
* @param format the format pattern ({@code null} not permitted).
*/
public MultipleXYSeriesLabelGenerator(String format) {
Args.nullNotPermitted(format, "format");
this.formatPattern = format;
this.additionalFormatPattern = "\n{0}";
this.seriesLabelLists = new HashMap();
}
/**
* Adds an extra label for the specified series.
*
* @param series the series index.
* @param label the label.
*/
public void addSeriesLabel(int series, String label) {
Integer key = series;
List labelList = (List) this.seriesLabelLists.get(key);
if (labelList == null) {
labelList = new java.util.ArrayList();
this.seriesLabelLists.put(key, labelList);
}
labelList.add(label);
}
/**
* Clears the extra labels for the specified series.
*
* @param series the series index.
*/
public void clearSeriesLabels(int series) {
this.seriesLabelLists.put(series, null);
}
/**
* Generates a label for the specified series. This label will be
* used for the chart legend.
*
* @param dataset the dataset ({@code null} not permitted).
* @param series the series.
*
* @return A series label.
*/
@Override
public String generateLabel(XYDataset dataset, int series) {
Args.nullNotPermitted(dataset, "dataset");
StringBuilder label = new StringBuilder();
label.append(MessageFormat.format(this.formatPattern,
createItemArray(dataset, series)));
List extraLabels = (List) this.seriesLabelLists.get(series);
if (extraLabels != null) {
Object[] temp = new Object[1];
for (int i = 0; i < extraLabels.size(); i++) {
temp[0] = extraLabels.get(i);
String labelAddition = MessageFormat.format(
this.additionalFormatPattern, temp);
label.append(labelAddition);
}
}
return label.toString();
}
/**
* Creates the array of items that can be passed to the
* {@link MessageFormat} class for creating labels.
*
* @param dataset the dataset ({@code null} not permitted).
* @param series the series (zero-based index).
*
* @return The items (never {@code null}).
*/
protected Object[] createItemArray(XYDataset dataset, int series) {
Object[] result = new Object[1];
result[0] = dataset.getSeriesKey(series).toString();
return result;
}
/**
* Returns an independent copy of the generator.
*
* @return A clone.
*
* @throws CloneNotSupportedException if cloning is not supported.
*/
@Override
public Object clone() throws CloneNotSupportedException {
MultipleXYSeriesLabelGenerator clone
= (MultipleXYSeriesLabelGenerator) super.clone();
clone.seriesLabelLists = new HashMap();
Set keys = this.seriesLabelLists.keySet();
Iterator iterator = keys.iterator();
while (iterator.hasNext()) {
Object key = iterator.next();
Object entry = this.seriesLabelLists.get(key);
Object toAdd = entry;
if (entry instanceof PublicCloneable) {
PublicCloneable pc = (PublicCloneable) entry;
toAdd = pc.clone();
}
clone.seriesLabelLists.put(key, toAdd);
}
return clone;
}
/**
* Tests this object for equality with an arbitrary object.
*
* @param obj the other object ({@code null} permitted).
*
* @return A boolean.
*/
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof MultipleXYSeriesLabelGenerator)) {
return false;
}
MultipleXYSeriesLabelGenerator that
= (MultipleXYSeriesLabelGenerator) obj;
if (!this.formatPattern.equals(that.formatPattern)) {
return false;
}
if (!this.additionalFormatPattern.equals(
that.additionalFormatPattern)) {
return false;
}
if (!this.seriesLabelLists.equals(that.seriesLabelLists)) {
return false;
}
return true;
}
/**
* Returns a hash code for this instance.
*
* @return A hash code.
*/
@Override
public int hashCode() {
int result = 127;
result = HashUtils.hashCode(result, this.formatPattern);
result = HashUtils.hashCode(result, this.additionalFormatPattern);
result = HashUtils.hashCode(result, this.seriesLabelLists);
return result;
}
}