org.jfree.chart.urls.TimeSeriesURLGenerator 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 2000-2020, 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.]
*
* ---------------------------
* TimeSeriesURLGenerator.java
* ---------------------------
* (C) Copyright 2002-2016, by Richard Atkinson and Contributors.
*
* Original Author: Richard Atkinson;
* Contributors: David Gilbert (for Object Refinery Limited);
*
*/
package org.jfree.chart.urls;
import java.io.Serializable;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.text.DateFormat;
import java.util.Date;
import org.jfree.chart.util.Args;
import org.jfree.data.xy.XYDataset;
/**
* A URL generator for time series charts.
*/
public class TimeSeriesURLGenerator implements XYURLGenerator, Serializable {
/** For serialization. */
private static final long serialVersionUID = -9122773175671182445L;
/** A formatter for the date. */
private DateFormat dateFormat = DateFormat.getInstance();
/** Prefix to the URL */
private String prefix = "index.html";
/** Name to use to identify the series */
private String seriesParameterName = "series";
/** Name to use to identify the item */
private String itemParameterName = "item";
/**
* Default constructor.
*/
public TimeSeriesURLGenerator() {
super();
}
/**
* Construct TimeSeriesURLGenerator overriding defaults.
*
* @param dateFormat a formatter for the date ({@code null} not
* permitted).
* @param prefix the prefix of the URL ({@code null} not permitted).
* @param seriesParameterName the name of the series parameter in the URL
* ({@code null} not permitted).
* @param itemParameterName the name of the item parameter in the URL
* ({@code null} not permitted).
*/
public TimeSeriesURLGenerator(DateFormat dateFormat, String prefix,
String seriesParameterName, String itemParameterName) {
Args.nullNotPermitted(dateFormat, "dateFormat");
Args.nullNotPermitted(prefix, "prefix");
Args.nullNotPermitted(seriesParameterName, "seriesParameterName");
Args.nullNotPermitted(itemParameterName, "itemParameterName");
this.dateFormat = (DateFormat) dateFormat.clone();
this.prefix = prefix;
this.seriesParameterName = seriesParameterName;
this.itemParameterName = itemParameterName;
}
/**
* Returns a clone of the date format assigned to this URL generator.
*
* @return The date format (never {@code null}).
*
* @since 1.0.6
*/
public DateFormat getDateFormat() {
return (DateFormat) this.dateFormat.clone();
}
/**
* Returns the prefix string.
*
* @return The prefix string (never {@code null}).
*
* @since 1.0.6
*/
public String getPrefix() {
return this.prefix;
}
/**
* Returns the series parameter name.
*
* @return The series parameter name (never {@code null}).
*
* @since 1.0.6
*/
public String getSeriesParameterName() {
return this.seriesParameterName;
}
/**
* Returns the item parameter name.
*
* @return The item parameter name (never {@code null}).
*
* @since 1.0.6
*/
public String getItemParameterName() {
return this.itemParameterName;
}
/**
* Generates a URL for a particular item within a series.
*
* @param dataset the dataset ({@code null} not permitted).
* @param series the series number (zero-based index).
* @param item the item number (zero-based index).
*
* @return The generated URL.
*/
@Override
public String generateURL(XYDataset dataset, int series, int item) {
String result = this.prefix;
boolean firstParameter = !result.contains("?");
Comparable seriesKey = dataset.getSeriesKey(series);
if (seriesKey != null) {
result += firstParameter ? "?" : "&";
try {
result += this.seriesParameterName + "=" + URLEncoder.encode(
seriesKey.toString(), "UTF-8");
} catch (UnsupportedEncodingException ex) {
throw new RuntimeException(ex);
}
firstParameter = false;
}
long x = (long) dataset.getXValue(series, item);
String xValue = this.dateFormat.format(new Date(x));
result += firstParameter ? "?" : "&";
try {
result += this.itemParameterName + "=" + URLEncoder.encode(xValue,
"UTF-8");
} catch (UnsupportedEncodingException ex) {
throw new RuntimeException(ex);
}
return result;
}
/**
* Tests this generator for equality with an arbitrary object.
*
* @param obj the object ({@code null} permitted).
*
* @return A boolean.
*/
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof TimeSeriesURLGenerator)) {
return false;
}
TimeSeriesURLGenerator that = (TimeSeriesURLGenerator) obj;
if (!this.dateFormat.equals(that.dateFormat)) {
return false;
}
if (!this.itemParameterName.equals(that.itemParameterName)) {
return false;
}
if (!this.prefix.equals(that.prefix)) {
return false;
}
if (!this.seriesParameterName.equals(that.seriesParameterName)) {
return false;
}
return true;
}
}