net.sf.jasperreports.data.DataFileStream.java Source code

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Here is the source code for net.sf.jasperreports.data.DataFileStream.java

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/*
 * 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 <http://www.gnu.org/licenses/>.
 */
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 (lucianc@users.sourceforge.net)
 */
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);
        }
    }

}