01: /* Copyright (c) 2001-2005, The HSQL Development Group
02: * All rights reserved.
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, are permitted provided that the following conditions are met:
06: *
07: * Redistributions of source code must retain the above copyright notice, this
08: * list of conditions and the following disclaimer.
09: *
10: * Redistributions in binary form must reproduce the above copyright notice,
11: * this list of conditions and the following disclaimer in the documentation
12: * and/or other materials provided with the distribution.
13: *
14: * Neither the name of the HSQL Development Group nor the names of its
15: * contributors may be used to endorse or promote products derived from this
16: * software without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21: * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
22: * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29: */
30:
31: package org.hsqldb.scriptio;
32:
33: import java.io.IOException;
34: import java.util.zip.Deflater;
35: import java.util.zip.DeflaterOutputStream;
36:
37: import org.hsqldb.Database;
38: import org.hsqldb.HsqlException;
39: import org.hsqldb.Trace;
40: import org.hsqldb.lib.FileAccess;
41:
42: /**
43: *
44: * @author fredt@users
45: * @since 1.7.2
46: * @version 1.7.2
47: */
48: class ScriptWriterZipped extends ScriptWriterBinary {
49:
50: private static final int bufferSize = 1 << 15;
51:
52: ScriptWriterZipped(Database db, String file, boolean includeCached,
53: boolean newFile) throws HsqlException {
54: super (db, file, includeCached, newFile);
55: }
56:
57: /**
58: * Override the underlying method with no operation.
59: */
60: public void sync() {
61: }
62:
63: protected void openFile() throws HsqlException {
64:
65: try {
66: FileAccess fa = database.getFileAccess();
67: java.io.OutputStream fos = fa
68: .openOutputStreamElement(outFile);
69:
70: outDescriptor = fa.getFileSync(fos);
71: fileStreamOut = new DeflaterOutputStream(fos, new Deflater(
72: Deflater.DEFAULT_COMPRESSION), bufferSize);
73: } catch (IOException e) {
74: throw Trace.error(Trace.FILE_IO_ERROR, Trace.Message_Pair,
75: new Object[] { e.toString(), outFile });
76: }
77: }
78:
79: /**
80: * This may not really be necessary, unless we add implementations where
81: * non-compressed data is added to the end of the copressed part.
82: */
83: protected void finishStream() throws IOException {
84: ((DeflaterOutputStream) fileStreamOut).finish();
85: fileStreamOut.flush();
86: }
87: }
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