/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.ui.datasources.xpath;
import org.pentaho.reporting.engine.classic.core.ParameterDataRow;
import org.pentaho.reporting.engine.classic.core.ReportDataFactoryException;
import org.pentaho.reporting.engine.classic.extensions.datasources.xpath.XPathDataFactory;
import org.pentaho.reporting.libraries.designtime.swing.background.CancelEvent;
import org.pentaho.reporting.libraries.designtime.swing.background.PreviewWorker;
import javax.swing.table.TableModel;
public class XPathPreviewWorker implements PreviewWorker {
private XPathDataFactory dataFactory;
private TableModel resultTableModel;
private ReportDataFactoryException exception;
private String query;
public XPathPreviewWorker( final XPathDataFactory dataFactory,
final String query ) {
if ( dataFactory == null ) {
throw new NullPointerException();
}
this.query = query;
this.dataFactory = dataFactory;
}
public ReportDataFactoryException getException() {
return exception;
}
public TableModel getResultTableModel() {
return resultTableModel;
}
public void close() {
}
/**
* Requests that the thread stop processing as soon as possible.
*/
public void cancelProcessing( final CancelEvent event ) {
dataFactory.cancelRunningQuery();
}
/**
* When an object implementing interface <code>Runnable</code> is used to create a thread, starting the thread causes
* the object's <code>run</code> method to be called in that separately executing thread.
* <p/>
* The general contract of the method <code>run</code> is that it may take any action whatsoever.
*
* @see Thread#run()
*/
public void run() {
try {
resultTableModel = dataFactory.queryData
( query, new ParameterDataRow() );
} catch ( ReportDataFactoryException e ) {
exception = e;
} finally {
dataFactory.close();
}
}
}