/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


package org.hsqldb.scriptio;

import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.Inflater;
import java.util.zip.InflaterInputStream;

import org.hsqldb.Database;
import org.hsqldb.HsqlException;

/**
 *
 *  @author fredt@users
 *  @since 1.7.2
 *  @version 1.8.0
 */
class ScriptReaderZipped extends ScriptReaderBinary {

    ScriptReaderZipped(Database db,
                       String file) throws HsqlException, IOException {
        super(db, file);
    }

    protected void openFile() throws IOException {

        InputStream d = db.isFilesInJar()
                        ? getClass().getResourceAsStream(fileName)
                        : db.getFileAccess().openInputStreamElement(fileName);

        dataStreamIn = new DataInputStream(
            new BufferedInputStream(
                new InflaterInputStream(d, new Inflater()), 1 << 13));
    }

    public void close() {

        try {
            ((DataInputStream) dataStreamIn).close();
        } catch (IOException e) {}
    }
}
