/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2011, 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.]
*
* ------------------
* DatasetReader.java
* ------------------
* (C) Copyright 2002-2008, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 20-Nov-2002 : Version 1 (DG);
*
*/
package org.jfree.data.xml;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.PieDataset;
import org.xml.sax.SAXException;
/**
* A utility class for reading datasets from XML.
*/
public class DatasetReader {
/**
* Reads a {@link PieDataset} from an XML file.
*
* @param file the file.
*
* @return A dataset.
*
* @throws IOException if there is a problem reading the file.
*/
public static PieDataset readPieDatasetFromXML(File file)
throws IOException {
InputStream in = new FileInputStream(file);
return readPieDatasetFromXML(in);
}
/**
* Reads a {@link PieDataset} from a stream.
*
* @param in the input stream.
*
* @return A dataset.
*
* @throws IOException if there is an I/O error.
*/
public static PieDataset readPieDatasetFromXML(InputStream in)
throws IOException {
PieDataset result = null;
SAXParserFactory factory = SAXParserFactory.newInstance();
try {
SAXParser parser = factory.newSAXParser();
PieDatasetHandler handler = new PieDatasetHandler();
parser.parse(in, handler);
result = handler.getDataset();
}
catch (SAXException e) {
System.out.println(e.getMessage());
}
catch (ParserConfigurationException e2) {
System.out.println(e2.getMessage());
}
return result;
}
/**
* Reads a {@link CategoryDataset} from a file.
*
* @param file the file.
*
* @return A dataset.
*
* @throws IOException if there is a problem reading the file.
*/
public static CategoryDataset readCategoryDatasetFromXML(File file)
throws IOException {
InputStream in = new FileInputStream(file);
return readCategoryDatasetFromXML(in);
}
/**
* Reads a {@link CategoryDataset} from a stream.
*
* @param in the stream.
*
* @return A dataset.
*
* @throws IOException if there is a problem reading the file.
*/
public static CategoryDataset readCategoryDatasetFromXML(InputStream in)
throws IOException {
CategoryDataset result = null;
SAXParserFactory factory = SAXParserFactory.newInstance();
try {
SAXParser parser = factory.newSAXParser();
CategoryDatasetHandler handler = new CategoryDatasetHandler();
parser.parse(in, handler);
result = handler.getDataset();
}
catch (SAXException e) {
System.out.println(e.getMessage());
}
catch (ParserConfigurationException e2) {
System.out.println(e2.getMessage());
}
return result;
}
}