diff options
Diffstat (limited to 'src/share/classes/java/util/zip/GZIPOutputStream.java')
| -rw-r--r-- | src/share/classes/java/util/zip/GZIPOutputStream.java | 90 |
1 files changed, 72 insertions, 18 deletions
diff --git a/src/share/classes/java/util/zip/GZIPOutputStream.java b/src/share/classes/java/util/zip/GZIPOutputStream.java index 4473f78db..d5edcf122 100644 --- a/src/share/classes/java/util/zip/GZIPOutputStream.java +++ b/src/share/classes/java/util/zip/GZIPOutputStream.java @@ -1,5 +1,5 @@ /* - * Copyright (c) 1996, 2002, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1996, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -54,25 +54,82 @@ class GZIPOutputStream extends DeflaterOutputStream { /** * Creates a new output stream with the specified buffer size. + * + * <p>The new output stream instance is created as if by invoking + * the 3-argument constructor GZIPOutputStream(out, size, false). + * * @param out the output stream * @param size the output buffer size * @exception IOException If an I/O error has occurred. * @exception IllegalArgumentException if size is <= 0 + */ public GZIPOutputStream(OutputStream out, int size) throws IOException { - super(out, new Deflater(Deflater.DEFAULT_COMPRESSION, true), size); + this(out, size, false); + } + + /** + * Creates a new output stream with the specified buffer size and + * flush mode. + * + * @param out the output stream + * @param size the output buffer size + * @param syncFlush + * if {@code true} invocation of the inherited + * {@link DeflaterOutputStream#flush() flush()} method of + * this instance flushes the compressor with flush mode + * {@link Deflater#SYNC_FLUSH} before flushing the output + * stream, otherwise only flushes the output stream + * @exception IOException If an I/O error has occurred. + * @exception IllegalArgumentException if size is <= 0 + * + * @since 1.7 + */ + public GZIPOutputStream(OutputStream out, int size, boolean syncFlush) + throws IOException + { + super(out, new Deflater(Deflater.DEFAULT_COMPRESSION, true), + size, + syncFlush); usesDefaultDeflater = true; writeHeader(); crc.reset(); } + /** * Creates a new output stream with a default buffer size. + * + * <p>The new output stream instance is created as if by invoking + * the 2-argument constructor GZIPOutputStream(out, false). + * * @param out the output stream * @exception IOException If an I/O error has occurred. */ public GZIPOutputStream(OutputStream out) throws IOException { - this(out, 512); + this(out, 512, false); + } + + /** + * Creates a new output stream with a default buffer size and + * the specified flush mode. + * + * @param out the output stream + * @param syncFlush + * if {@code true} invocation of the inherited + * {@link DeflaterOutputStream#flush() flush()} method of + * this instance flushes the compressor with flush mode + * {@link Deflater#SYNC_FLUSH} before flushing the output + * stream, otherwise only flushes the output stream + * + * @exception IOException If an I/O error has occurred. + * + * @since 1.7 + */ + public GZIPOutputStream(OutputStream out, boolean syncFlush) + throws IOException + { + this(out, 512, syncFlush); } /** @@ -122,22 +179,19 @@ class GZIPOutputStream extends DeflaterOutputStream { /* * Writes GZIP member header. */ - - private final static byte[] header = { - (byte) GZIP_MAGIC, // Magic number (short) - (byte)(GZIP_MAGIC >> 8), // Magic number (short) - Deflater.DEFLATED, // Compression method (CM) - 0, // Flags (FLG) - 0, // Modification time MTIME (int) - 0, // Modification time MTIME (int) - 0, // Modification time MTIME (int) - 0, // Modification time MTIME (int) - 0, // Extra flags (XFLG) - 0 // Operating system (OS) - }; - private void writeHeader() throws IOException { - out.write(header); + out.write(new byte[] { + (byte) GZIP_MAGIC, // Magic number (short) + (byte)(GZIP_MAGIC >> 8), // Magic number (short) + Deflater.DEFLATED, // Compression method (CM) + 0, // Flags (FLG) + 0, // Modification time MTIME (int) + 0, // Modification time MTIME (int) + 0, // Modification time MTIME (int) + 0, // Modification time MTIME (int) + 0, // Extra flags (XFLG) + 0 // Operating system (OS) + }); } /* |