/*
|
* Copyright (c) 1994, 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
|
* under the terms of the GNU General Public License version 2 only, as
|
* published by the Free Software Foundation. Oracle designates this
|
* particular file as subject to the "Classpath" exception as provided
|
* by Oracle in the LICENSE file that accompanied this code.
|
*
|
* This code 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
|
* version 2 for more details (a copy is included in the LICENSE file that
|
* accompanied this code).
|
*
|
* You should have received a copy of the GNU General Public License version
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
*
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
* or visit www.oracle.com if you need additional information or have any
|
* questions.
|
*/
|
// package java.io;
|
// import java.util.Arrays;
|
import Arrays from './Arrays';
|
import OutputStream from './OutputStream';
|
import Integer from './Integer';
|
import IllegalArgumentException from '../IllegalArgumentException';
|
import OutOfMemoryError from '../OutOfMemoryError';
|
import System from './System';
|
import IndexOutOfBoundsException from '../IndexOutOfBoundsException';
|
/**
|
* This class implements an output stream in which the data is
|
* written into a byte array. The buffer automatically grows as data
|
* is written to it.
|
* The data can be retrieved using <code>toByteArray()</code> and
|
* <code>toString()</code>.
|
* <p>
|
* Closing a <tt>ByteArrayOutputStream</tt> has no effect. The methods in
|
* this class can be called after the stream has been closed without
|
* generating an <tt>IOException</tt>.
|
*
|
* @author Arthur van Hoff
|
* @since JDK1.0
|
*/
|
export default /*public*/ class ByteArrayOutputStream extends OutputStream {
|
/**
|
* Creates a new byte array output stream. The buffer capacity is
|
* initially 32 bytes, though its size increases if necessary.
|
*/
|
// public constructor() {
|
// this(32);
|
// }
|
/**
|
* Creates a new byte array output stream, with a buffer capacity of
|
* the specified size, in bytes.
|
*
|
* @param size the initial size.
|
* @exception IllegalArgumentException if size is negative.
|
*/
|
constructor(size = 32) {
|
super();
|
/**
|
* The number of valid bytes in the buffer.
|
*/
|
this.count = 0;
|
if (size < 0) {
|
throw new IllegalArgumentException('Negative initial size: '
|
+ size);
|
}
|
this.buf = new Uint8Array(size);
|
}
|
/**
|
* Increases the capacity if necessary to ensure that it can hold
|
* at least the number of elements specified by the minimum
|
* capacity argument.
|
*
|
* @param minCapacity the desired minimum capacity
|
* @throws OutOfMemoryError if {@code minCapacity < 0}. This is
|
* interpreted as a request for the unsatisfiably large capacity
|
* {@code (long) Integer.MAX_VALUE + (minCapacity - Integer.MAX_VALUE)}.
|
*/
|
ensureCapacity(minCapacity) {
|
// overflow-conscious code
|
if (minCapacity - this.buf.length > 0)
|
this.grow(minCapacity);
|
}
|
/**
|
* Increases the capacity to ensure that it can hold at least the
|
* number of elements specified by the minimum capacity argument.
|
*
|
* @param minCapacity the desired minimum capacity
|
*/
|
grow(minCapacity) {
|
// overflow-conscious code
|
let oldCapacity = this.buf.length;
|
let newCapacity = oldCapacity << 1;
|
if (newCapacity - minCapacity < 0)
|
newCapacity = minCapacity;
|
if (newCapacity < 0) {
|
if (minCapacity < 0) // overflow
|
throw new OutOfMemoryError();
|
newCapacity = Integer.MAX_VALUE;
|
}
|
this.buf = Arrays.copyOfUint8Array(this.buf, newCapacity);
|
}
|
/**
|
* Writes the specified byte to this byte array output stream.
|
*
|
* @param b the byte to be written.
|
*/
|
write(b) {
|
this.ensureCapacity(this.count + 1);
|
this.buf[this.count] = /*(byte)*/ b;
|
this.count += 1;
|
}
|
/**
|
* Writes <code>len</code> bytes from the specified byte array
|
* starting at offset <code>off</code> to this byte array output stream.
|
*
|
* @param b the data.
|
* @param off the start offset in the data.
|
* @param len the number of bytes to write.
|
*/
|
writeBytesOffset(b, off, len) {
|
if ((off < 0) || (off > b.length) || (len < 0) ||
|
((off + len) - b.length > 0)) {
|
throw new IndexOutOfBoundsException();
|
}
|
this.ensureCapacity(this.count + len);
|
System.arraycopy(b, off, this.buf, this.count, len);
|
this.count += len;
|
}
|
/**
|
* Writes the complete contents of this byte array output stream to
|
* the specified output stream argument, as if by calling the output
|
* stream's write method using <code>out.write(buf, 0, count)</code>.
|
*
|
* @param out the output stream to which to write the data.
|
* @exception IOException if an I/O error occurs.
|
*/
|
writeTo(out) {
|
out.writeBytesOffset(this.buf, 0, this.count);
|
}
|
/**
|
* Resets the <code>count</code> field of this byte array output
|
* stream to zero, so that all currently accumulated output in the
|
* output stream is discarded. The output stream can be used again,
|
* reusing the already allocated buffer space.
|
*
|
* @see java.io.ByteArrayInputStream#count
|
*/
|
reset() {
|
this.count = 0;
|
}
|
/**
|
* Creates a newly allocated byte array. Its size is the current
|
* size of this output stream and the valid contents of the buffer
|
* have been copied into it.
|
*
|
* @return the current contents of this output stream, as a byte array.
|
* @see java.io.ByteArrayOutputStream#size()
|
*/
|
toByteArray() {
|
return Arrays.copyOfUint8Array(this.buf, this.count);
|
}
|
/**
|
* Returns the current size of the buffer.
|
*
|
* @return the value of the <code>count</code> field, which is the number
|
* of valid bytes in this output stream.
|
* @see java.io.ByteArrayOutputStream#count
|
*/
|
size() {
|
return this.count;
|
}
|
toString(param) {
|
if (!param) {
|
return this.toString_void();
|
}
|
if (typeof param === 'string') {
|
return this.toString_string(param);
|
}
|
return this.toString_number(param);
|
}
|
/**
|
* Converts the buffer's contents into a string decoding bytes using the
|
* platform's default character set. The length of the new <tt>String</tt>
|
* is a function of the character set, and hence may not be equal to the
|
* size of the buffer.
|
*
|
* <p> This method always replaces malformed-input and unmappable-character
|
* sequences with the default replacement string for the platform's
|
* default character set. The {@linkplain java.nio.charset.CharsetDecoder}
|
* class should be used when more control over the decoding process is
|
* required.
|
*
|
* @return String decoded from the buffer's contents.
|
* @since JDK1.1
|
*/
|
toString_void() {
|
return new String(this.buf /*, 0, this.count*/).toString();
|
}
|
/**
|
* Converts the buffer's contents into a string by decoding the bytes using
|
* the specified {@link java.nio.charset.Charset charsetName}. The length of
|
* the new <tt>String</tt> is a function of the charset, and hence may not be
|
* equal to the length of the byte array.
|
*
|
* <p> This method always replaces malformed-input and unmappable-character
|
* sequences with this charset's default replacement string. The {@link
|
* java.nio.charset.CharsetDecoder} class should be used when more control
|
* over the decoding process is required.
|
*
|
* @param charsetName the name of a supported
|
* {@linkplain java.nio.charset.Charset </code>charset<code>}
|
* @return String decoded from the buffer's contents.
|
* @exception UnsupportedEncodingException
|
* If the named charset is not supported
|
* @since JDK1.1
|
*/
|
toString_string(charsetName) {
|
return new String(this.buf /*, 0, this.count, charsetName*/).toString();
|
}
|
/**
|
* Creates a newly allocated string. Its size is the current size of
|
* the output stream and the valid contents of the buffer have been
|
* copied into it. Each character <i>c</i> in the resulting string is
|
* constructed from the corresponding element <i>b</i> in the byte
|
* array such that:
|
* <blockquote><pre>
|
* c == (char)(((hibyte & 0xff) << 8) | (b & 0xff))
|
* </pre></blockquote>
|
*
|
* @deprecated This method does not properly convert bytes into characters.
|
* As of JDK 1.1, the preferred way to do this is via the
|
* <code>toString(String enc)</code> method, which takes an encoding-name
|
* argument, or the <code>toString()</code> method, which uses the
|
* platform's default character encoding.
|
*
|
* @param hibyte the high byte of each resulting Unicode character.
|
* @return the current contents of the output stream, as a string.
|
* @see java.io.ByteArrayOutputStream#size()
|
* @see java.io.ByteArrayOutputStream#toString(String)
|
* @see java.io.ByteArrayOutputStream#toString()
|
*/
|
// @Deprecated
|
toString_number(hibyte) {
|
return new String(this.buf /*, hibyte, 0, this.count*/).toString();
|
}
|
/**
|
* Closing a <tt>ByteArrayOutputStream</tt> has no effect. The methods in
|
* this class can be called after the stream has been closed without
|
* generating an <tt>IOException</tt>.
|
* <p>
|
*
|
* @throws IOException
|
*/
|
close() {
|
}
|
}
|
