HSQLDB example source code file (HsqlByteArrayOutputStream.java)

This example HSQLDB source code file (HsqlByteArrayOutputStream.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - HSQLDB tags/keywords

arrayindexoutofboundsexception, dataoutput, eofexception, hsqlbytearrayoutputstream, hsqlbytearrayoutputstream, io, ioexception, ioexception, string, string, unsupportedencodingexception, utfdataformatexception, utfdataformatexception

The HSQLDB HsqlByteArrayOutputStream.java source code

/* Copyright (c) 2001-2008, 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.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 1.8.1
 * @since 1.7.0
 */
public class HsqlByteArrayOutputStream extends java.io.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];

        for (int left = length; left > 0; ) {
            int read = input.read(buffer, count, left);

            if (read == -1) {
                if (left > 0) {
                    input.close();

                    throw new EOFException();
                }

                break;
            }

            left  -= read;
            count += read;
        }
    }

    // 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 final 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.writeUTF(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 writeNoCheck(int b) {
        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 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;
    }

    public int size() {
        return count;
    }

    public void setPosition(int newPos) {

        if (newPos > buffer.length) {
            throw new ArrayIndexOutOfBoundsException();
        }

        count = newPos;
    }

    public String toString() {
        return new String(buffer, 0, count);
    }

    public String toString(String enc) throws UnsupportedEncodingException {
        return new String(buffer, 0, count, enc);
    }

    public void close() throws IOException {}

    // additional public methods not in similar java.util classes
    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 setBuffer(byte[] buffer) {
        count       = 0;
        this.buffer = buffer;
    }

    public void ensureRoom(int extra) {

        int newcount = count + extra;
        int newsize  = buffer.length;

        if (newcount > newsize) {
            while (newcount > newsize) {
                newsize *= 2;
            }

            byte[] newbuf = new byte[newsize];

            System.arraycopy(buffer, 0, newbuf, 0, count);

            buffer = newbuf;
        }
    }

    public void reset(int newSize) {

        count = 0;

        if (newSize > buffer.length) {
            buffer = new byte[newSize];
        }
    }

    public void reset(byte[] buffer) {
        count       = 0;
        this.buffer = buffer;
    }
}