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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports 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 3 of the License, or
* (at your option) any later version.
*
* JasperReports 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 JasperReports. If not, see .
*/
package net.sf.jasperreports.data;
import java.io.FilterInputStream;
import java.io.IOException;
import net.sf.jasperreports.engine.JRRuntimeException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* @author Lucian Chirita ([email protected])
*/
public class DataFileStream extends FilterInputStream
{
private static final Log log = LogFactory.getLog(DataFileUtils.class);
private final DataFileConnection connection;
public DataFileStream(DataFileConnection connection)
{
// using FilterInputStream as decorator
super(connection.getInputStream());
this.connection = connection;
}
@Override
public void close() throws IOException
{
boolean closed = false;
try
{
super.close();
closed = true;
}
finally
{
try
{
// attempt to close the connection no matter if the stream was closed successfully or not
connection.dispose();
}
catch (RuntimeException e)
{
if (closed)
{
// if the stream closed successfully, propagate the connection exception
throw new IOException(e);
}
else
{
log.warn("Failed to dispose connection for " + connection, e);
}
}
}
}
public void dispose()
{
try
{
super.close();
}
catch (IOException e)
{
log.warn("Failed to dispose stream for " + connection, e);
}
try
{
connection.dispose();
}
catch (JRRuntimeException e)//catch RuntimeException?
{
log.warn("Failed to dispose connection for " + connection, e);
}
}
}