org.hsqldb.lib.HsqlByteArrayOutputStream Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of hsqldb Show documentation
Show all versions of hsqldb Show documentation
HSQLDB - Lightweight 100% Java SQL Database Engine
/* Copyright (c) 2001-2019, 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.
*/
package org.hsqldb.lib;
import java.io.DataOutput;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.UTFDataFormatException;
import java.io.UnsupportedEncodingException;
/**
* This class is a replacement for both java.io.ByteArrayOuputStream
* (without synchronization) and java.io.DataOutputStream
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.3.5
* @since 1.7.0
*/
public class HsqlByteArrayOutputStream extends OutputStream
implements DataOutput {
protected byte[] buffer;
protected int count;
public HsqlByteArrayOutputStream() {
this(128);
}
public HsqlByteArrayOutputStream(int size) {
if (size < 128) {
size = 128;
}
buffer = new byte[size];
}
public HsqlByteArrayOutputStream(byte[] buffer) {
this.buffer = buffer;
}
/**
* Constructor from an InputStream limits size to the length argument.
* Throws if the actual length of the InputStream is smaller than
* length value.
*/
public HsqlByteArrayOutputStream(InputStream input,
int length) throws IOException {
buffer = new byte[length];
int used = write(input, length);
if (used != length) {
throw new EOFException();
}
}
public HsqlByteArrayOutputStream(InputStream input) throws IOException {
buffer = new byte[128];
for (;;) {
int read = input.read(buffer, count, buffer.length - count);
if (read == -1) {
break;
}
count += read;
if (count == buffer.length) {
ensureRoom(128);
}
}
}
// methods that implement dataOutput
public void writeShort(int v) {
ensureRoom(2);
buffer[count++] = (byte) (v >>> 8);
buffer[count++] = (byte) v;
}
public void writeInt(int v) {
if (count + 4 > buffer.length) {
ensureRoom(4);
}
buffer[count++] = (byte) (v >>> 24);
buffer[count++] = (byte) (v >>> 16);
buffer[count++] = (byte) (v >>> 8);
buffer[count++] = (byte) v;
}
public void writeLong(long v) {
writeInt((int) (v >>> 32));
writeInt((int) v);
}
public void writeBytes(String s) {
int len = s.length();
ensureRoom(len);
for (int i = 0; i < len; i++) {
buffer[count++] = (byte) s.charAt(i);
}
}
public final void writeFloat(float v) {
writeInt(Float.floatToIntBits(v));
}
public final void writeDouble(double v) {
writeLong(Double.doubleToLongBits(v));
}
public void writeBoolean(boolean v) {
ensureRoom(1);
buffer[count++] = (byte) (v ? 1
: 0);
}
public void writeByte(int v) {
ensureRoom(1);
buffer[count++] = (byte) v;
}
public void writeChar(int v) {
ensureRoom(2);
buffer[count++] = (byte) (v >>> 8);
buffer[count++] = (byte) v;
}
public void writeChars(String s) {
int len = s.length();
ensureRoom(len * 2);
for (int i = 0; i < len; i++) {
int v = s.charAt(i);
buffer[count++] = (byte) (v >>> 8);
buffer[count++] = (byte) v;
}
}
public void writeUTF(String str) throws IOException {
int len = str.length();
if (len > 0xffff) {
throw new UTFDataFormatException();
}
ensureRoom(len * 3 + 2);
//
int initpos = count;
count += 2;
StringConverter.stringToUTFBytes(str, this);
int bytecount = count - initpos - 2;
if (bytecount > 0xffff) {
count = initpos;
throw new UTFDataFormatException();
}
buffer[initpos++] = (byte) (bytecount >>> 8);
buffer[initpos] = (byte) bytecount;
}
/**
* does nothing
*/
public void flush() throws java.io.IOException {}
// methods that extend java.io.OutputStream
public void write(int b) {
ensureRoom(1);
buffer[count++] = (byte) b;
}
public void write(byte[] b) {
write(b, 0, b.length);
}
public void write(byte[] b, int off, int len) {
ensureRoom(len);
System.arraycopy(b, off, buffer, count, len);
count += len;
}
public String toString() {
return new String(buffer, 0, count);
}
public void close() throws IOException {}
// additional public methods not in similar java.util classes
public void writeNoCheck(int b) {
buffer[count++] = (byte) b;
}
public void writeChars(char[] charArray) {
int len = charArray.length;
ensureRoom(len * 2);
for (int i = 0; i < len; i++) {
int v = charArray[i];
buffer[count++] = (byte) (v >>> 8);
buffer[count++] = (byte) v;
}
}
public int write(InputStream input, int countLimit) throws IOException {
int left = countLimit;
ensureRoom(countLimit);
while (left > 0) {
int read = input.read(buffer, count, left);
if (read == -1) {
break;
}
left -= read;
count += read;
}
return countLimit - left;
}
public int write(Reader input, int countLimit) throws IOException {
int left = countLimit;
ensureRoom(countLimit * 2);
while (left > 0) {
int c = input.read();
if (c == -1) {
break;
}
writeChar(c);
left--;
}
return countLimit - left;
}
public void writeTo(OutputStream out) throws IOException {
out.write(buffer, 0, count);
}
public void reset() {
count = 0;
}
public byte[] toByteArray() {
byte[] newbuf = new byte[count];
System.arraycopy(buffer, 0, newbuf, 0, count);
return newbuf;
}
final public int size() {
return count;
}
public void setPosition(int newPos) {
if (newPos > buffer.length) {
throw new ArrayIndexOutOfBoundsException();
}
count = newPos;
}
public String toString(String enc) throws UnsupportedEncodingException {
return new String(buffer, 0, count, enc);
}
public void write(char[] c, int off, int len) {
ensureRoom(len * 2);
for (int i = off; i < len; i++) {
int v = c[i];
buffer[count++] = (byte) (v >>> 8);
buffer[count++] = (byte) v;
}
}
public void fill(int b, int len) {
ensureRoom(len);
for (int i = 0; i < len; i++) {
buffer[count++] = (byte) b;
}
}
public byte[] getBuffer() {
return this.buffer;
}
public void ensureRoom(int extra) {
long newcount = count + extra;
long newsize = buffer.length;
if (newcount > Integer.MAX_VALUE) {
throw new OutOfMemoryError("2GB maximum buffer length exceeded");
}
if (newcount > newsize) {
while (newcount > newsize) {
newsize *= 2;
}
if (newsize > Integer.MAX_VALUE) {
newsize = Integer.MAX_VALUE;
}
byte[] newbuf = new byte[(int) newsize];
System.arraycopy(buffer, 0, newbuf, 0, count);
buffer = newbuf;
}
}
public void reset(int newSize) {
count = 0;
if (newSize > buffer.length) {
newSize = (int) ArrayUtil.getBinaryMultipleCeiling(newSize, 4096);
buffer = new byte[newSize];
}
}
public void reset(byte[] buffer) {
count = 0;
this.buffer = buffer;
}
/**
* size must fit in buffer
*/
public void setSize(int size) {
count = size;
}
}