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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 2000-2013, 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.]
*
* ---------------------------
* TimeSeriesURLGenerator.java
* ---------------------------
* (C) Copyright 2002-2013, by Richard Atkinson and Contributors.
*
* Original Author: Richard Atkinson;
* Contributors: David Gilbert (for Object Refinery Limited);
*
* Changes:
* --------
* 29-Aug-2002 : Initial version (RA);
* 09-Oct-2002 : Fixed errors reported by Checkstyle (DG);
* 23-Mar-2003 : Implemented Serializable (DG);
* 15-Jul-2004 : Switched getX() with getXValue() and getY() with
* getYValue() (DG);
* 13-Jan-2005 : Modified for XHTML 1.0 compliance (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 06-Jul-2006 : Swap call to dataset's getX() --> getXValue() (DG);
* 17-Apr-2007 : Added null argument checks to constructor, new accessor
* methods, added equals() override and used new URLUtilities
* class to encode series key and date (DG);
* 03-Jul-2013 : Use ParamChecks (DG);
*
*/
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.ParamChecks;
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 (null not
* permitted).
* @param prefix the prefix of the URL (null not permitted).
* @param seriesParameterName the name of the series parameter in the URL
* (null not permitted).
* @param itemParameterName the name of the item parameter in the URL
* (null not permitted).
*/
public TimeSeriesURLGenerator(DateFormat dateFormat, String prefix,
String seriesParameterName, String itemParameterName) {
ParamChecks.nullNotPermitted(dateFormat, "dateFormat");
ParamChecks.nullNotPermitted(prefix, "prefix");
ParamChecks.nullNotPermitted(seriesParameterName, "seriesParameterName");
ParamChecks.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 null).
*
* @since 1.0.6
*/
public DateFormat getDateFormat() {
return (DateFormat) this.dateFormat.clone();
}
/**
* Returns the prefix string.
*
* @return The prefix string (never null).
*
* @since 1.0.6
*/
public String getPrefix() {
return this.prefix;
}
/**
* Returns the series parameter name.
*
* @return The series parameter name (never null).
*
* @since 1.0.6
*/
public String getSeriesParameterName() {
return this.seriesParameterName;
}
/**
* Returns the item parameter name.
*
* @return The item parameter name (never 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 (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 (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;
}
}