org.mapdb

Class DataOutput2

java.lang.Object

java.io.OutputStream

org.mapdb.DataOutput2

All Implemented Interfaces:

Closeable, DataOutput, Flushable, AutoCloseable

public final class DataOutput2
extends OutputStream
implements DataOutput

Provides DataOutput implementation on top of growable byte[]

ByteArrayOutputStream is not used as it requires byte[] copying

Author:

Jan Kotek

Field Summary

Fields

Modifier and Type	Field and Description
byte[]	buf
int	pos

Constructor Summary

Constructors

Constructor and Description
DataOutput2()
DataOutput2(byte[] buf)

Method Summary

Modifier and Type	Method and Description
byte[]	copyBytes()
void	ensureAvail(int n) make sure there will be enought space in buffer to write N bytes
static void	packInt(DataOutput in, int value) Pack non-negative long into output stream.
static void	packLong(DataOutput out, long value) Pack non-negative long into output stream.
void	write(byte[] b)
void	write(byte[] b, int off, int len)
void	write(int b)
void	writeBoolean(boolean v)
void	writeByte(int v)
void	writeBytes(String s)
void	writeChar(int v)
void	writeChars(String s)
void	writeDouble(double v)
void	writeFloat(float v)
void	writeInt(int v)
void	writeLong(long v)
void	writeShort(int v)
void	writeUTF(String s)

Methods inherited from class java.io.OutputStream

close, flush

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

buf

public byte[] buf

pos

public volatile int pos

Constructor Detail

DataOutput2

public DataOutput2()

DataOutput2

public DataOutput2(byte[] buf)

Method Detail

copyBytes

public byte[] copyBytes()

ensureAvail

public void ensureAvail(int n)

make sure there will be enought space in buffer to write N bytes

write

public void write(int b)
           throws IOException

Specified by:

write in interface DataOutput

Specified by:

write in class OutputStream

Throws:

IOException

write

public void write(byte[] b)
           throws IOException

Specified by:

write in interface DataOutput

Overrides:

write in class OutputStream

Throws:

IOException

write

public void write(byte[] b,
                  int off,
                  int len)
           throws IOException

Specified by:

write in interface DataOutput

Overrides:

write in class OutputStream

Throws:

IOException

writeBoolean

public void writeBoolean(boolean v)
                  throws IOException

Specified by:

writeBoolean in interface DataOutput

Throws:

IOException

writeByte

public void writeByte(int v)
               throws IOException

Specified by:

writeByte in interface DataOutput

Throws:

IOException

writeShort

public void writeShort(int v)
                throws IOException

Specified by:

writeShort in interface DataOutput

Throws:

IOException

writeChar

public void writeChar(int v)
               throws IOException

Specified by:

writeChar in interface DataOutput

Throws:

IOException

writeInt

public void writeInt(int v)
              throws IOException

Specified by:

writeInt in interface DataOutput

Throws:

IOException

writeLong

public void writeLong(long v)
               throws IOException

Specified by:

writeLong in interface DataOutput

Throws:

IOException

writeFloat

public void writeFloat(float v)
                throws IOException

Specified by:

writeFloat in interface DataOutput

Throws:

IOException

writeDouble

public void writeDouble(double v)
                 throws IOException

Specified by:

writeDouble in interface DataOutput

Throws:

IOException

writeBytes

public void writeBytes(String s)
                throws IOException

Specified by:

writeBytes in interface DataOutput

Throws:

IOException

writeChars

public void writeChars(String s)
                throws IOException

Specified by:

writeChars in interface DataOutput

Throws:

IOException

writeUTF

public void writeUTF(String s)
              throws IOException

Specified by:

writeUTF in interface DataOutput

Throws:

IOException

packLong

public static void packLong(DataOutput out,
                            long value)
                     throws IOException

Pack non-negative long into output stream. It will occupy 1-10 bytes depending on value (lower values occupy smaller space) This method originally comes from Kryo Framework, author Nathan Sweet. It was modified to fit MapDB needs.

Parameters:

out - DataOutput to put value into

value - to be serialized, must be non-negative

Throws:

IOException

packInt

public static void packInt(DataOutput in,
                           int value)
                    throws IOException

Pack non-negative long into output stream. It will occupy 1-5 bytes depending on value (lower values occupy smaller space) This method originally comes from Kryo Framework, author Nathan Sweet. It was modified to fit MapDB needs.

Parameters:

in - DataOutput to put value into

value - to be serialized, must be non-negative

Throws:

IOException