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Diffstat (limited to 'libjava/java/io/BufferedOutputStream.java')
-rw-r--r-- | libjava/java/io/BufferedOutputStream.java | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/libjava/java/io/BufferedOutputStream.java b/libjava/java/io/BufferedOutputStream.java deleted file mode 100644 index ce7ebc7..0000000 --- a/libjava/java/io/BufferedOutputStream.java +++ /dev/null @@ -1,192 +0,0 @@ -/* BufferedOutputStream.java -- Buffer output into large blocks before writing - Copyright (C) 1998, 2000, 2003 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath 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 -General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package java.io; - -/** - * This class accumulates bytes written in a buffer instead of immediately - * writing the data to the underlying output sink. The bytes are instead - * as one large block when the buffer is filled, or when the stream is - * closed or explicitly flushed. This mode operation can provide a more - * efficient mechanism for writing versus doing numerous small unbuffered - * writes. - * - * @author Aaron M. Renn (arenn@urbanophile.com) - */ -public class BufferedOutputStream extends FilterOutputStream -{ - /** - * This is the default buffer size - */ - private static final int DEFAULT_BUFFER_SIZE = 512; - - /** - * This is the internal byte array used for buffering output before - * writing it. - */ - protected byte[] buf; - - /** - * This is the number of bytes that are currently in the buffer and - * are waiting to be written to the underlying stream. It always points to - * the index into the buffer where the next byte of data will be stored - */ - protected int count; - - /** - * This method initializes a new <code>BufferedOutputStream</code> instance - * that will write to the specified subordinate <code>OutputStream</code> - * and which will use a default buffer size of 512 bytes. - * - * @param out The underlying <code>OutputStream</code> to write data to - */ - public BufferedOutputStream(OutputStream out) - { - this(out, DEFAULT_BUFFER_SIZE); - } - - /** - * This method initializes a new <code>BufferedOutputStream</code> instance - * that will write to the specified subordinate <code>OutputStream</code> - * and which will use the specified buffer size - * - * @param out The underlying <code>OutputStream</code> to write data to - * @param size The size of the internal buffer - */ - public BufferedOutputStream(OutputStream out, int size) - { - super(out); - - buf = new byte[size]; - } - - /** - * This method causes any currently buffered bytes to be immediately - * written to the underlying output stream. - * - * @exception IOException If an error occurs - */ - public synchronized void flush() throws IOException - { - if (count == 0) - return; - - out.write(buf, 0, count); - count = 0; - out.flush(); - } - - /** - * This method flushes any remaining buffered bytes then closes the - * underlying output stream. Any further attempts to write to this stream - * may throw an exception - * - public synchronized void close() throws IOException - { - flush(); - out.close(); - } - */ - - /** - * This method runs when the object is garbage collected. It is - * responsible for ensuring that all buffered bytes are written and - * for closing the underlying stream. - * - * @exception IOException If an error occurs (ignored by the Java runtime) - * - protected void finalize() throws IOException - { - close(); - } - */ - - /** - * This method writes a single byte of data. This will be written to the - * buffer instead of the underlying data source. However, if the buffer - * is filled as a result of this write request, it will be flushed to the - * underlying output stream. - * - * @param b The byte of data to be written, passed as an int - * - * @exception IOException If an error occurs - */ - public synchronized void write(int b) throws IOException - { - if (count == buf.length) - flush(); - - buf[count] = (byte)(b & 0xFF); - ++count; - } - - /** - * This method writes <code>len</code> bytes from the byte array - * <code>buf</code> starting at position <code>offset</code> in the buffer. - * These bytes will be written to the internal buffer. However, if this - * write operation fills the buffer, the buffer will be flushed to the - * underlying output stream. - * - * @param buf The array of bytes to write. - * @param offset The index into the byte array to start writing from. - * @param len The number of bytes to write. - * - * @exception IOException If an error occurs - */ - public synchronized void write(byte[] buf, int offset, int len) - throws IOException - { - // Buffer can hold everything. Note that the case where LEN < 0 - // is automatically handled by the downstream write. - if (len < (this.buf.length - count)) - { - System.arraycopy(buf, offset, this.buf, count, len); - count += len; - } - else - { - // The write was too big. So flush the buffer and write the new - // bytes directly to the underlying stream, per the JDK 1.2 - // docs. - flush(); - out.write (buf, offset, len); - } - } - -} // class BufferedOutputStream - |