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com.tangosol.io
Class PackedDataOutputStream

java.lang.Object
java.io.OutputStream
com.tangosol.io.WrapperOutputStream
com.tangosol.io.PackedDataOutputStream

All Implemented Interfaces:

OutputStreaming, java.io.Closeable, java.io.DataOutput, java.io.Flushable

public class PackedDataOutputStream

extends WrapperOutputStream

implements java.io.DataOutput

This is an imitation DataOutputStream class that packs its data tighter using variable-length integers and supports UTF longer than 64KB.

Warning! This class is not intended to be thread-safe!

Author:

cp 2004.09.09

Field Summary

Fields inherited from class com.tangosol.io.WrapperOutputStream

m_out

Constructor Summary

PackedDataOutputStream(java.io.OutputStream out)
Construct a PackedDataOutputStream that will output to the specified OutputStream object.

Method Summary

void	writeBoolean(boolean f) Writes the boolean value f.
void	writeByte(int b) Writes the eight low-order bits of the argument b.
void	writeBytes(java.lang.String s) Writes the String s, but only the low-order byte from each character of the String is written.
void	writeChar(int ch) Writes a char value, comprised of the 16 low-order bits of the argument ch; the 16 high-order bits of ch are ignored.
void	writeChars(java.lang.String s) Writes the String s as a sequence of characters.
void	writeDouble(double dfl) Writes a double value.
void	writeFloat(float fl) Writes a float value.
void	writeInt(int n) Writes an int value.
void	writeLong(long l) Writes a long value.
void	writeShort(int n) Writes a short value, comprised of the 16 low-order bits of the argument n; the 16 high-order bits of n are ignored.
void	writeUTF(java.lang.String s) Writes the String s as a sequence of characters, but using UTF-8 encoding for the characters, and including the String length data so that the corresponding DataInput.readUTF() method can reconstitute a String from the written data.

Methods inherited from class com.tangosol.io.WrapperOutputStream

close, ensureOutputStream, flush, getOutputStream, setOutputStream, write, write, write

Methods inherited from interface java.io.DataOutput

write, write, write

Constructor Detail

PackedDataOutputStream

public PackedDataOutputStream(java.io.OutputStream out)

Construct a PackedDataOutputStream that will output to the specified OutputStream object.

Parameters:

out - an OutputStream to write to

Method Detail

writeBoolean

public void writeBoolean(boolean f)
                  throws java.io.IOException

Writes the boolean value f.

Specified by:

writeBoolean in interface java.io.DataOutput

Parameters:

f - the boolean to be written

Throws:

java.io.IOException - if an I/O error occurs

writeByte

public void writeByte(int b)
               throws java.io.IOException

Writes the eight low-order bits of the argument b. The 24 high-order bits of b are ignored.

Specified by:

writeByte in interface java.io.DataOutput

Parameters:

b - the byte to write (passed as an integer)

Throws:

java.io.IOException - if an I/O error occurs

writeShort

public void writeShort(int n)
                throws java.io.IOException

Writes a short value, comprised of the 16 low-order bits of the argument n; the 16 high-order bits of n are ignored.

Specified by:

writeShort in interface java.io.DataOutput

Parameters:

n - the short to write (passed as an integer)

Throws:

java.io.IOException - if an I/O error occurs

writeChar

public void writeChar(int ch)
               throws java.io.IOException

Writes a char value, comprised of the 16 low-order bits of the argument ch; the 16 high-order bits of ch are ignored.

Specified by:

writeChar in interface java.io.DataOutput

Parameters:

ch - the char to write (passed as an integer)

Throws:

java.io.IOException - if an I/O error occurs

writeInt

public void writeInt(int n)
              throws java.io.IOException

Writes an int value.

Specified by:

writeInt in interface java.io.DataOutput

Parameters:

n - the int to write

Throws:

java.io.IOException - if an I/O error occurs

writeLong

public void writeLong(long l)
               throws java.io.IOException

Writes a long value.

Specified by:

writeLong in interface java.io.DataOutput

Parameters:

l - the long to write

Throws:

java.io.IOException - if an I/O error occurs

writeFloat

public void writeFloat(float fl)
                throws java.io.IOException

Writes a float value.

Specified by:

writeFloat in interface java.io.DataOutput

Parameters:

fl - the float to write

Throws:

java.io.IOException - if an I/O error occurs

writeDouble

public void writeDouble(double dfl)
                 throws java.io.IOException

Writes a double value.

Specified by:

writeDouble in interface java.io.DataOutput

Parameters:

dfl - the double to write

Throws:

java.io.IOException - if an I/O error occurs

writeBytes

public void writeBytes(java.lang.String s)
                throws java.io.IOException

Writes the String s, but only the low-order byte from each character of the String is written.

Specified by:

writeBytes in interface java.io.DataOutput

Parameters:

s - the String to write

Throws:

java.io.IOException - if an I/O error occurs

java.lang.NullPointerException - if s is null

writeChars

public void writeChars(java.lang.String s)
                throws java.io.IOException

Writes the String s as a sequence of characters.

Specified by:

writeChars in interface java.io.DataOutput

Parameters:

s - the String to write

Throws:

java.io.IOException - if an I/O error occurs

java.lang.NullPointerException - if s is null

writeUTF

public void writeUTF(java.lang.String s)
              throws java.io.IOException

Writes the String s as a sequence of characters, but using UTF-8 encoding for the characters, and including the String length data so that the corresponding DataInput.readUTF() method can reconstitute a String from the written data.

Specified by:

writeUTF in interface java.io.DataOutput

Parameters:

s - the String to write

Throws:

java.io.IOException - if an I/O error occurs

java.lang.NullPointerException - if s is null

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