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Java Source | 1996-05-03 | 3.7 KB | 139 lines |
- /*
- * @(#)ByteArrayOutputStream.java 1.16 95/12/18 Arthur van Hoff
- *
- * Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Permission to use, copy, modify, and distribute this software
- * and its documentation for NON-COMMERCIAL purposes and without
- * fee is hereby granted provided that this copyright notice
- * appears in all copies. Please refer to the file "copyright.html"
- * for further important copyright and licensing information.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
- * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
- * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
- */
-
- package java.io;
-
- /**
- * This class implements a buffer that can be
- * used as an OutputStream. The buffer automatically
- * grows when data is written to the stream.
- * The data can be retrieved using toByteArray() and
- * toString().
- * @version 1.16, 18 Dec 1995
- * @author Arthur van Hoff
- */
- public
- class ByteArrayOutputStream extends OutputStream {
- /**
- * The buffer where data is stored.
- */
- protected byte buf[];
-
- /**
- * The number of bytes in the buffer.
- */
- protected int count;
-
- /**
- * Creates a new ByteArrayOutputStream.
- */
- public ByteArrayOutputStream() {
- this(32);
- }
-
- /**
- * Creates a new ByteArrayOutputStream with the specified initial size.
- * @param size the initial size
- */
- public ByteArrayOutputStream(int size) {
- buf = new byte[size];
- }
-
- /**
- * Writes a byte to the buffer.
- * @param b the byte
- */
- public synchronized void write(int b) {
- int newcount = count + 1;
- if (newcount > buf.length) {
- byte newbuf[] = new byte[Math.max(buf.length << 1, newcount)];
- System.arraycopy(buf, 0, newbuf, 0, count);
- buf = newbuf;
- }
- buf[count] = (byte)b;
- count = newcount;
- }
-
- /**
- * Writes bytes to the buffer.
- * @param b the data to be written
- * @param off the start offset in the data
- * @param len the number of bytes that are written
- */
- public synchronized void write(byte b[], int off, int len) {
- int newcount = count + len;
- if (newcount > buf.length) {
- byte newbuf[] = new byte[Math.max(buf.length << 1, newcount)];
- System.arraycopy(buf, 0, newbuf, 0, count);
- buf = newbuf;
- }
- System.arraycopy(b, off, buf, count, len);
- count = newcount;
- }
-
- /**
- * Writes the contents of the buffer to another stream.
- * @param out the output stream to write to
- */
- public synchronized void writeTo(OutputStream out) throws IOException {
- out.write(buf, 0, count);
- }
-
- /**
- * Resets the buffer so that you can use it again without
- * throwing away the already allocated buffer.
- */
- public synchronized void reset() {
- count = 0;
- }
-
- /**
- * Returns a copy of the input data.
- */
- public synchronized byte toByteArray()[] {
- byte newbuf[] = new byte[count];
- System.arraycopy(buf, 0, newbuf, 0, count);
- return newbuf;
- }
-
- /**
- * Returns the current size of the buffer.
- */
- public int size() {
- return count;
- }
-
- /**
- * Converts input data to a string.
- * @return the string.
- */
- public String toString() {
- return new String(toByteArray(), 0);
- }
-
- /**
- * Converts input data to a string. The top 8 bits of
- * each 16 bit Unicode character are set to hibyte.
- * @param hibyte the bits set
- */
- public String toString(int hibyte) {
- return new String(toByteArray(), hibyte);
- }
- }
-