HSQLDB example source code file (RowInputBinary.java)

This example HSQLDB source code file (RowInputBinary.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

bigdecimal, biginteger, binary, date, hsqlexception, hsqlexception, integer, io, ioexception, ioexception, jdbc, math, rowinputbase, rowinputbinary, rowinputbinary, sql, string, string

The HSQLDB RowInputBinary.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.rowio;

import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.sql.Date;
import java.sql.Time;
import java.sql.Timestamp;

import org.hsqldb.HsqlDateTime;
import org.hsqldb.HsqlException;
import org.hsqldb.lib.StringConverter;
import org.hsqldb.store.ValuePool;
import org.hsqldb.types.Binary;
import org.hsqldb.types.JavaObject;

/**
 *  Provides methods for reading the data for a row from a
 *  byte array. The format of data is that used for storage of cached
 *  tables by v.1.6.x databases, apart from strings.
 *
 * @author sqlbob@users (RMP)
 * @author fredt@users
 * @version 1.7.2
 * @since 1.7.0
 */
public class RowInputBinary extends RowInputBase
implements org.hsqldb.rowio.RowInputInterface {

    private RowOutputBinary out;

    public RowInputBinary() {
        super();
    }

    public RowInputBinary(byte[] buf) {
        super(buf);
    }

    /**
     * uses the byte[] buffer from out. At each reset, the buffer is set
     * to the current one for out.
     */
    public RowInputBinary(RowOutputBinary out) {

        super(out.getBuffer());

        this.out = out;
    }

    protected byte[] readByteArray() throws IOException {

        byte[] b = new byte[readInt()];

        readFully(b);

        return b;
    }

    public int readType() throws IOException {
        return readShort();
    }

    public short readShortData() throws IOException {
        return readShort();
    }

    public int readIntData() throws IOException {
        return readInt();
    }

    public long readLongData() throws IOException {
        return readLong();
    }

    public String readString() throws IOException {

        int    length = readInt();
        String s      = StringConverter.readUTF(buffer, pos, length);

        s   = ValuePool.getString(s);
        pos += length;

        return s;
    }

    protected boolean checkNull() throws IOException {

        int b = readByte();

        return b == 0 ? true
                      : false;
    }

    protected String readChar(int type) throws IOException {
        return readString();
    }

    protected Integer readSmallint() throws IOException, HsqlException {
        return ValuePool.getInt(readShort());
    }

    protected Integer readInteger() throws IOException, HsqlException {
        return ValuePool.getInt(readInt());
    }

    protected Long readBigint() throws IOException, HsqlException {
        return ValuePool.getLong(readLong());
    }

    protected Double readReal(int type) throws IOException, HsqlException {
        return ValuePool.getDouble(readLong());
    }

    protected BigDecimal readDecimal() throws IOException, HsqlException {

        byte[]     bytes  = readByteArray();
        int        scale  = readInt();
        BigInteger bigint = new BigInteger(bytes);

        return ValuePool.getBigDecimal(new BigDecimal(bigint, scale));
    }

    protected Boolean readBit() throws IOException, HsqlException {
        return readBoolean() ? Boolean.TRUE
                             : Boolean.FALSE;
    }

    protected Time readTime() throws IOException, HsqlException {
        return new Time(HsqlDateTime.getNormalisedTime(readLong()));
    }

    protected Date readDate() throws IOException, HsqlException {

        long date = HsqlDateTime.getNormalisedDate(readLong());

        return ValuePool.getDate(date);
    }

    protected Timestamp readTimestamp() throws IOException, HsqlException {
        return HsqlDateTime.timestampValue(readLong(), readInt());
    }

    protected Object readOther() throws IOException, HsqlException {
        return new JavaObject(readByteArray());
    }

    protected Binary readBinary(int type) throws IOException, HsqlException {
        return new Binary(readByteArray(), false);
    }

    /**
     *  Used to reset the row, ready for Result data to be written into the
     *  byte[] buffer by an external routine.
     *
     */
    public void resetRow(int rowsize) {

        if (out != null) {
            out.reset(rowsize);

            buffer = out.getBuffer();
        }

        super.reset();
    }

    /**
     *  Used to reset the row, ready for a new db row to be written into the
     *  byte[] buffer by an external routine.
     *
     */
    public void resetRow(int filepos, int rowsize) throws IOException {

        if (out != null) {
            out.reset(rowsize);

            buffer = out.getBuffer();
        }

        super.resetRow(filepos, rowsize);
    }
}