/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2007, 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.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ----------------------------
* StandardPieURLGenerator.java
* ----------------------------
* (C) Copyright 2002-2007, 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;
* 09-Oct-2002 : Fixed errors reported by Checkstyle (DG);
* 07-Mar-2003 : Modified to use KeyedValuesDataset and added pieIndex
* parameter (DG);
* 21-Mar-2003 : Implemented Serializable (DG);
* 24-Apr-2003 : Switched around PieDataset and KeyedValuesDataset (DG);
* 31-Mar-2004 : Added an optional 'pieIndex' parameter (DG);
* 13-Jan-2005 : Fixed for compliance with XHTML 1.0 (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 24-Nov-2006 : Fixed equals() method and added argument checks (DG);
* 17-Apr-2007 : Encode section key in generateURL() (DG);
*
*/
package org.jfree.chart.urls;
import java.io.Serializable;
import org.jfree.data.general.PieDataset;
import org.jfree.util.ObjectUtilities;
/**
* A URL generator for pie charts. Instances of this class are immutable.
*/
public class StandardPieURLGenerator implements PieURLGenerator, Serializable {
/** For serialization. */
private static final long serialVersionUID = 1626966402065883419L;
/** The prefix. */
private String prefix = "index.html";
/** The category parameter name. */
private String categoryParameterName = "category";
/** The pie index parameter name. */
private String indexParameterName = "pieIndex";
/**
* Default constructor.
*/
public StandardPieURLGenerator() {
this("index.html");
}
/**
* Creates a new generator.
*
* @param prefix the prefix (<code>null</code> not permitted).
*/
public StandardPieURLGenerator(String prefix) {
this(prefix, "category");
}
/**
* Creates a new generator.
*
* @param prefix the prefix (<code>null</code> not permitted).
* @param categoryParameterName the category parameter name
* (<code>null</code> not permitted).
*/
public StandardPieURLGenerator(String prefix,
String categoryParameterName) {
this(prefix, categoryParameterName, "pieIndex");
}
/**
* Creates a new generator.
*
* @param prefix the prefix (<code>null</code> not permitted).
* @param categoryParameterName the category parameter name
* (<code>null</code> not permitted).
* @param indexParameterName the index parameter name (<code>null</code>
* permitted).
*/
public StandardPieURLGenerator(String prefix,
String categoryParameterName,
String indexParameterName) {
if (prefix == null) {
throw new IllegalArgumentException("Null 'prefix' argument.");
}
if (categoryParameterName == null) {
throw new IllegalArgumentException(
"Null 'categoryParameterName' argument.");
}
this.prefix = prefix;
this.categoryParameterName = categoryParameterName;
this.indexParameterName = indexParameterName;
}
/**
* Generates a URL.
*
* @param dataset the dataset (ignored).
* @param key the item key (<code>null</code> not permitted).
* @param pieIndex the pie index.
*
* @return A string containing the generated URL.
*/
public String generateURL(PieDataset dataset, Comparable key,
int pieIndex) {
String url = this.prefix;
if (url.indexOf("?") > -1) {
url += "&" + this.categoryParameterName + "="
+ URLUtilities.encode(key.toString(), "UTF-8");
}
else {
url += "?" + this.categoryParameterName + "="
+ URLUtilities.encode(key.toString(), "UTF-8");
}
if (this.indexParameterName != null) {
url += "&" + this.indexParameterName + "="
+ String.valueOf(pieIndex);
}
return url;
}
/**
* Tests if this object is equal to another.
*
* @param obj the object (<code>null</code> permitted).
*
* @return A boolean.
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof StandardPieURLGenerator)) {
return false;
}
StandardPieURLGenerator that = (StandardPieURLGenerator) obj;
if (!this.prefix.equals(that.prefix)) {
return false;
}
if (!this.categoryParameterName.equals(that.categoryParameterName)) {
return false;
}
if (!ObjectUtilities.equal(this.indexParameterName,
that.indexParameterName)) {
return false;
}
return true;
}
}
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