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HSQLDB example source code file (ZipUnzipFile.java)
The HSQLDB ZipUnzipFile.java source code/* * For work developed by the HSQL Development Group: * * Copyright (c) 2001-2010, 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; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * * * For work originally developed by the Hypersonic SQL Group: * * Copyright (c) 1995-2000, The Hypersonic SQL 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 Hypersonic SQL 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 THE HYPERSONIC SQL GROUP, * 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; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * This software consists of voluntary contributions made by many individuals * on behalf of the Hypersonic SQL Group. */ package org.hsqldb.lib; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.zip.Deflater; import java.util.zip.DeflaterOutputStream; import java.util.zip.Inflater; import java.util.zip.InflaterInputStream; // oj@openoffice.org - patch 1.8.0 - use FileAccess /** * * New Class based on original Hypersonic code. * * @author Thomas Mueller (Hypersonic SQL Group) * @version 1.7.2 * @since Hypersonic SQL */ public class ZipUnzipFile { private static final int COPY_BLOCK_SIZE = 1 << 16; public static void compressFile(String infilename, String outfilename, FileAccess storage) throws IOException { InputStream in = null; DeflaterOutputStream f = null; OutputStream outstream = null; boolean completed = false; // if there is no file if (!storage.isStreamElement(infilename)) { return; } try { byte[] b = new byte[COPY_BLOCK_SIZE]; in = storage.openInputStreamElement(infilename); outstream = storage.openOutputStreamElement(outfilename); f = new DeflaterOutputStream(outstream, new Deflater(Deflater.BEST_SPEED), COPY_BLOCK_SIZE); while (true) { int l = in.read(b, 0, COPY_BLOCK_SIZE); if (l == -1) { break; } f.write(b, 0, l); } completed = true; } catch (Throwable e) { throw FileUtil.toIOException(e); } finally { try { if (in != null) { in.close(); } if (f != null) { f.finish(); // reported to be missing from close() in some JRE libs if (outstream instanceof FileOutputStream) { storage.getFileSync(outstream).sync(); } f.close(); } if (!completed && storage.isStreamElement(outfilename)) { storage.removeElement(outfilename); } } catch (Throwable e) { throw FileUtil.toIOException(e); } } } public static void decompressFile(String infilename, String outfilename, FileAccess storage) throws IOException { InflaterInputStream f = null; OutputStream outstream = null; boolean completed = false; try { if (!storage.isStreamElement(infilename)) { return; } storage.removeElement(outfilename); f = new InflaterInputStream( storage.openInputStreamElement(infilename), new Inflater()); outstream = storage.openOutputStreamElement(outfilename); byte[] b = new byte[COPY_BLOCK_SIZE]; while (true) { int l = f.read(b, 0, COPY_BLOCK_SIZE); if (l == -1) { break; } outstream.write(b, 0, l); } completed = true; } catch (Throwable e) { throw FileUtil.toIOException(e); } finally { try { if (f != null) { f.close(); } if (outstream != null) { outstream.flush(); if (outstream instanceof FileOutputStream) { storage.getFileSync(outstream).sync(); } outstream.close(); } if (!completed && storage.isStreamElement(outfilename)) { storage.removeElement(outfilename); } } catch (Throwable e) { throw FileUtil.toIOException(e); } } } } Other HSQLDB examples (source code examples)Here is a short list of links related to this HSQLDB ZipUnzipFile.java source code file: |
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