/* Copyright (c) 2001-2009, 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
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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package org.hsqldb.rowio;
import java.io.EOFException;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import org.hsqldb.Types;
import org.hsqldb.lib.StringConverter;
import org.hsqldb.store.ValuePool;
import org.hsqldb.types.BinaryData;
import org.hsqldb.types.BlobData;
import org.hsqldb.types.BlobDataID;
import org.hsqldb.types.ClobData;
import org.hsqldb.types.ClobDataID;
import org.hsqldb.types.IntervalMonthData;
import org.hsqldb.types.IntervalSecondData;
import org.hsqldb.types.IntervalType;
import org.hsqldb.types.JavaObjectData;
import org.hsqldb.types.TimeData;
import org.hsqldb.types.TimestampData;
import org.hsqldb.types.Type;
/**
* 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 Bob Preston (sqlbob@users dot sourceforge.net)
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 1.9.0
* @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;
}
public int readType() throws IOException {
return readShort();
}
public String readString() throws IOException {
int length = readInt();
String s = StringConverter.readUTF(buf, 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(Type type) throws IOException {
return readString();
}
protected Integer readSmallint() throws IOException {
return ValuePool.getInt(readShort());
}
protected Integer readInteger() throws IOException {
return ValuePool.getInt(readInt());
}
protected Long readBigint() throws IOException {
return ValuePool.getLong(readLong());
}
protected Double readReal() throws IOException {
return ValuePool.getDouble(readLong());
}
protected BigDecimal readDecimal(Type type) throws IOException {
byte[] bytes = readByteArray();
int scale = readInt();
BigInteger bigint = new BigInteger(bytes);
return ValuePool.getBigDecimal(new BigDecimal(bigint, scale));
}
protected Boolean readBoole() throws IOException {
return readBoolean() ? Boolean.TRUE
: Boolean.FALSE;
}
protected TimeData readTime(Type type) throws IOException {
if (type.typeCode == Types.SQL_TIME) {
return new TimeData(readInt(), readInt(), 0);
} else {
return new TimeData(readInt(), readInt(), readInt());
}
}
protected TimestampData readDate(Type type) throws IOException {
long date = readLong();
return new TimestampData(date);
}
protected TimestampData readTimestamp(Type type) throws IOException {
if (type.typeCode == Types.SQL_TIMESTAMP) {
return new TimestampData(readLong(), readInt());
} else {
return new TimestampData(readLong(), readInt(), readInt());
}
}
protected IntervalMonthData readYearMonthInterval(Type type)
throws IOException {
long months = readLong();
return new IntervalMonthData(months, (IntervalType) type);
}
protected IntervalSecondData readDaySecondInterval(Type type)
throws IOException {
long seconds = readLong();
int nanos = readInt();
return new IntervalSecondData(seconds, nanos, (IntervalType) type);
}
protected Object readOther() throws IOException {
return new JavaObjectData(readByteArray());
}
protected BinaryData readBit() throws IOException {
int length = readInt();
byte[] b = new byte[(length + 7) / 8];
readFully(b);
return new BinaryData(b, length);
}
protected BinaryData readBinary() throws IOException {
return new BinaryData(readByteArray(), false);
}
protected ClobData readClob() throws IOException {
long id = super.readLong();
return new ClobDataID(id);
}
protected BlobData readBlob() throws IOException {
long id = super.readLong();
return new BlobDataID(id);
}
// helper methods
public byte[] readByteArray() throws IOException {
byte[] b = new byte[readInt()];
readFully(b);
return b;
}
public char[] readCharArray() throws IOException {
char[] c = new char[readInt()];
if (count - pos < c.length) {
pos = count;
throw new EOFException();
}
for (int i = 0; i < c.length; i++) {
int ch1 = buf[pos++] & 0xff;
int ch2 = buf[pos++] & 0xff;
c[i] = (char) ((ch1 << 8) + (ch2));
}
return c;
}
/**
* 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);
buf = 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);
buf = out.getBuffer();
}
super.resetRow(filepos, rowsize);
}
}