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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.]
*
* ---------------------------
* StandardXYURLGenerator.java
* ---------------------------
* (C) Copyright 2002-2013, by Richard Atkinson and Contributors.
*
* Original Author: Richard Atkinson;
* Contributors: David Gilbert (for Object Refinery Limited);
*
* Changes:
* --------
* 05-Aug-2002 : Version 1, contributed by Richard Atkinson;
* 29-Aug-2002 : New constructor and member variables to customise series and
* item parameter names (RA);
* 09-Oct-2002 : Fixed errors reported by Checkstyle (DG);
* 23-Mar-2003 : Implemented Serializable (DG);
* 01-Mar-2004 : Added equals() method (DG);
* 13-Jan-2005 : Modified for XHTML 1.0 compliance (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 02-Feb-2007 : Removed author tags from all over JFreeChart sources (DG);
* 03-Jul-2013 : Use ParamChecks (DG);
*
*/
package org.jfree.chart.urls;
import java.io.Serializable;
import org.jfree.chart.util.ParamChecks;
import org.jfree.data.xy.XYDataset;
import org.jfree.util.ObjectUtilities;
/**
* A URL generator.
*/
public class StandardXYURLGenerator implements XYURLGenerator, Serializable {
/** For serialization. */
private static final long serialVersionUID = -1771624523496595382L;
/** The default prefix. */
public static final String DEFAULT_PREFIX = "index.html";
/** The default series parameter. */
public static final String DEFAULT_SERIES_PARAMETER = "series";
/** The default item parameter. */
public static final String DEFAULT_ITEM_PARAMETER = "item";
/** Prefix to the URL */
private String prefix;
/** Series parameter name to go in each URL */
private String seriesParameterName;
/** Item parameter name to go in each URL */
private String itemParameterName;
/**
* Creates a new default generator. This constructor is equivalent to
* calling StandardXYURLGenerator("index.html", "series", "item");
* .
*/
public StandardXYURLGenerator() {
this(DEFAULT_PREFIX, DEFAULT_SERIES_PARAMETER, DEFAULT_ITEM_PARAMETER);
}
/**
* Creates a new generator with the specified prefix. This constructor
* is equivalent to calling
* StandardXYURLGenerator(prefix, "series", "item");.
*
* @param prefix the prefix to the URL (null not permitted).
*/
public StandardXYURLGenerator(String prefix) {
this(prefix, DEFAULT_SERIES_PARAMETER, DEFAULT_ITEM_PARAMETER);
}
/**
* Constructor that overrides all the defaults
*
* @param prefix the prefix to the URL (null not permitted).
* @param seriesParameterName the name of the series parameter to go in
* each URL (null not permitted).
* @param itemParameterName the name of the item parameter to go in each
* URL (null not permitted).
*/
public StandardXYURLGenerator(String prefix, String seriesParameterName,
String itemParameterName) {
ParamChecks.nullNotPermitted(prefix, "prefix");
ParamChecks.nullNotPermitted(seriesParameterName, "seriesParameterName");
ParamChecks.nullNotPermitted(itemParameterName, "itemParameterName");
this.prefix = prefix;
this.seriesParameterName = seriesParameterName;
this.itemParameterName = itemParameterName;
}
/**
* Generates a URL for a particular item within a series.
*
* @param dataset the dataset.
* @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) {
// TODO: URLEncode?
String url = this.prefix;
boolean firstParameter = url.indexOf("?") == -1;
url += firstParameter ? "?" : "&";
url += this.seriesParameterName + "=" + series
+ "&" + this.itemParameterName + "=" + item;
return url;
}
/**
* 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 StandardXYURLGenerator)) {
return false;
}
StandardXYURLGenerator that = (StandardXYURLGenerator) obj;
if (!ObjectUtilities.equal(that.prefix, this.prefix)) {
return false;
}
if (!ObjectUtilities.equal(that.seriesParameterName,
this.seriesParameterName)) {
return false;
}
if (!ObjectUtilities.equal(that.itemParameterName,
this.itemParameterName)) {
return false;
}
return true;
}
}