com.twelvemonkeys.io

Class LittleEndianDataOutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

com.twelvemonkeys.io.LittleEndianDataOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.DataOutput, java.io.Flushable, java.lang.AutoCloseable

public class LittleEndianDataOutputStream
extends java.io.FilterOutputStream
implements java.io.DataOutput

A little endian output stream writes primitive Java numbers and characters to an output stream in a little endian format.

The standard java.io.DataOutputStream class which this class imitates uses big endian integers.

Warning: The DataInput and DataOutput interfaces specifies big endian byte order in their documentation. This means that this class is, strictly speaking, not a proper implementation. However, I don't see a reason for the these interfaces to specify the byte order of their underlying representations.

Version:

1.0.1, 19 May 1999

Author:

Elliotte Rusty Harold

See Also:

LittleEndianRandomAccessFile, DataOutputStream, DataInput, DataOutput

Field Summary

Fields

Modifier and Type	Field and Description
protected int	bytesWritten The number of bytes written so far to the little endian output stream.

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor and Description
LittleEndianDataOutputStream(java.io.OutputStream pStream) Creates a new little endian output stream and chains it to the output stream specified by the pStream argument.

Method Summary

Modifier and Type	Method and Description
int	size() Returns the number of bytes written to this little endian output stream.
void	write(byte[] pBytes, int pOffset, int pLength) Writes pLength bytes from the specified byte array starting at pOffset to the underlying output stream.
void	write(int pByte) Writes the specified byte value to the underlying output stream.
void	writeBoolean(boolean pBoolean) Writes a boolean to the underlying output stream as a single byte.
void	writeByte(int pByte) Writes out a byte to the underlying output stream
void	writeBytes(java.lang.String pString) Writes a string to the underlying output stream as a sequence of bytes.
void	writeChar(int pChar) Writes a two byte char to the underlying output stream in little endian order, low byte first.
void	writeChars(java.lang.String pString) Writes a string to the underlying output stream as a sequence of characters.
void	writeDouble(double d) Writes an 8 byte Java double to the underlying output stream in little endian order.
void	writeFloat(float f) Writes a 4 byte Java float to the underlying output stream in little endian order.
void	writeInt(int pInt) Writes a four-byte int to the underlying output stream in little endian order, low byte first, high byte last
void	writeLong(long pLong) Writes an eight-byte long to the underlying output stream in little endian order, low byte first, high byte last
void	writeShort(int pShort) Writes a two byte short to the underlying output stream in little endian order, low byte first.
void	writeUTF(java.lang.String pString) Writes a string of no more than 65,535 characters to the underlying output stream using UTF-8 encoding.

Methods inherited from class java.io.FilterOutputStream

close, flush, write

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.DataOutput

write

Field Detail

bytesWritten

protected int bytesWritten

The number of bytes written so far to the little endian output stream.

Constructor Detail

LittleEndianDataOutputStream

public LittleEndianDataOutputStream(java.io.OutputStream pStream)

Creates a new little endian output stream and chains it to the output stream specified by the pStream argument.

Parameters:

pStream - the underlying output stream.

See Also:

FilterOutputStream.out

Method Detail

write

public void write(int pByte)
           throws java.io.IOException

Writes the specified byte value to the underlying output stream.

Specified by:

write in interface java.io.DataOutput

Overrides:

write in class java.io.FilterOutputStream

Parameters:

pByte - the byte value to be written.

Throws:

java.io.IOException - if the underlying stream throws an IOException.

write

public void write(byte[] pBytes,
                  int pOffset,
                  int pLength)
           throws java.io.IOException

Writes pLength bytes from the specified byte array starting at pOffset to the underlying output stream.

Specified by:

write in interface java.io.DataOutput

Overrides:

write in class java.io.FilterOutputStream

Parameters:

pBytes - the data.

pOffset - the start offset in the data.

pLength - the number of bytes to write.

Throws:

java.io.IOException - if the underlying stream throws an IOException.

writeBoolean

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

Writes a boolean to the underlying output stream as a single byte. If the argument is true, the byte value 1 is written. If the argument is false, the byte value 0 in written.

Specified by:

writeBoolean in interface java.io.DataOutput

Parameters:

pBoolean - the boolean value to be written.

Throws:

java.io.IOException - if the underlying stream throws an IOException.

writeByte

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

Writes out a byte to the underlying output stream

Specified by:

writeByte in interface java.io.DataOutput

Parameters:

pByte - the byte value to be written.

Throws:

java.io.IOException - if the underlying stream throws an IOException.

writeShort

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

Writes a two byte short to the underlying output stream in little endian order, low byte first.

Specified by:

writeShort in interface java.io.DataOutput

Parameters:

pShort - the short to be written.

Throws:

java.io.IOException - if the underlying stream throws an IOException.

writeChar

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

Writes a two byte char to the underlying output stream in little endian order, low byte first.

Specified by:

writeChar in interface java.io.DataOutput

Parameters:

pChar - the char value to be written.

Throws:

java.io.IOException - if the underlying stream throws an IOException.

writeInt

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

Writes a four-byte int to the underlying output stream in little endian order, low byte first, high byte last

Specified by:

writeInt in interface java.io.DataOutput

Parameters:

pInt - the int to be written.

Throws:

java.io.IOException - if the underlying stream throws an IOException.

writeLong

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

Writes an eight-byte long to the underlying output stream in little endian order, low byte first, high byte last

Specified by:

writeLong in interface java.io.DataOutput

Parameters:

pLong - the long to be written.

Throws:

java.io.IOException - if the underlying stream throws an IOException.

writeFloat

public final void writeFloat(float f)
                      throws java.io.IOException

Writes a 4 byte Java float to the underlying output stream in little endian order.

Specified by:

writeFloat in interface java.io.DataOutput

Parameters:

f - the float value to be written.

Throws:

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

writeDouble

public final void writeDouble(double d)
                       throws java.io.IOException

Writes an 8 byte Java double to the underlying output stream in little endian order.

Specified by:

writeDouble in interface java.io.DataOutput

Parameters:

d - the double value to be written.

Throws:

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

writeBytes

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

Writes a string to the underlying output stream as a sequence of bytes. Each character is written to the data output stream as if by the writeByte(int) method.

Specified by:

writeBytes in interface java.io.DataOutput

Parameters:

pString - the String value to be written.

Throws:

java.io.IOException - if the underlying stream throws an IOException.

See Also:

writeByte(int), FilterOutputStream.out

writeChars

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

Writes a string to the underlying output stream as a sequence of characters. Each character is written to the data output stream as if by the writeChar method.

Specified by:

writeChars in interface java.io.DataOutput

Parameters:

pString - a String value to be written.

Throws:

java.io.IOException - if the underlying stream throws an IOException.

See Also:

writeChar(int), FilterOutputStream.out

writeUTF

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

Writes a string of no more than 65,535 characters to the underlying output stream using UTF-8 encoding. This method first writes a two byte short in big endian order as required by the UTF-8 specification. This gives the number of bytes in the UTF-8 encoded version of the string, not the number of characters in the string. Next each character of the string is written using the UTF-8 encoding for the character.

Specified by:

writeUTF in interface java.io.DataOutput

Parameters:

pString - the string to be written.

Throws:

java.io.UTFDataFormatException - if the string is longer than 65,535 characters.

java.io.IOException - if the underlying stream throws an IOException.

size

public int size()

Returns the number of bytes written to this little endian output stream. (This class is not thread-safe with respect to this method. It is possible that this number is temporarily less than the actual number of bytes written.)

Returns:

the value of the written field.

See Also:

bytesWritten