Package org.apache.poi.util

Class LittleEndianInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.apache.poi.util.LittleEndianInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, LittleEndianInput

Direct Known Subclasses:

ChunkedCipherInputStream

public class LittleEndianInputStream
extends java.io.FilterInputStream
implements LittleEndianInput

Wraps an InputStream providing LittleEndianInput

This class does not buffer any input, so the stream read position maintained by this class is consistent with that of the inner stream.

Constructor Summary

Constructors

Constructor	Description
LittleEndianInputStream(java.io.InputStream is)

Method Summary

Modifier and Type	Method	Description
int	available()
int	getReadIndex()
void	mark(int readlimit)
int	read(byte[] b, int off, int len)
byte	readByte()
double	readDouble()
float	readFloat()	get a float value, reads it in little endian format then converts the resulting revolting IEEE 754 (curse them) floating point number to a happy java float
void	readFully(byte[] buf)
void	readFully(byte[] buf, int off, int len)
int	readInt()
long	readLong()
void	readPlain(byte[] buf, int off, int len)	Usually acts the same as LittleEndianInput.readFully(byte[], int, int), but for an encrypted stream the raw (unencrypted) data is filled
short	readShort()
int	readUByte()
long	readUInt()	get an unsigned int value from an InputStream
int	readUShort()
void	reset()
void	skipFully(int len)

Methods inherited from class java.io.FilterInputStream

close, markSupported, read, read, skip

Methods inherited from class java.io.InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, transferTo

Methods inherited from class java.lang.Object

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

Constructor Detail

LittleEndianInputStream

public LittleEndianInputStream(java.io.InputStream is)

Method Detail

available

public int available()

Specified by:

available in interface LittleEndianInput

Overrides:

available in class java.io.FilterInputStream

readByte

public byte readByte()

Specified by:

readByte in interface LittleEndianInput

readUByte

public int readUByte()

Specified by:

readUByte in interface LittleEndianInput

readFloat

public float readFloat()

get a float value, reads it in little endian format then converts the resulting revolting IEEE 754 (curse them) floating point number to a happy java float

Returns:

the float (32-bit) value

readDouble

public double readDouble()

Specified by:

readDouble in interface LittleEndianInput

readInt

public int readInt()

Specified by:

readInt in interface LittleEndianInput

readUInt

public long readUInt()

get an unsigned int value from an InputStream

Returns:

the unsigned int (32-bit) value

Throws:

java.lang.RuntimeException - wraps any IOException thrown from reading the stream.

readLong

public long readLong()

Specified by:

readLong in interface LittleEndianInput

readShort

public short readShort()

Specified by:

readShort in interface LittleEndianInput

readUShort

public int readUShort()

Specified by:

readUShort in interface LittleEndianInput

readFully

public void readFully(byte[] buf)

Specified by:

readFully in interface LittleEndianInput

readFully

public void readFully(byte[] buf,
                      int off,
                      int len)

Specified by:

readFully in interface LittleEndianInput

read

public int read(byte[] b,
                int off,
                int len)
         throws java.io.IOException

Overrides:

read in class java.io.FilterInputStream

Throws:

java.io.IOException

mark

public void mark(int readlimit)

Overrides:

mark in class java.io.FilterInputStream

reset

public void reset()
           throws java.io.IOException

Overrides:

reset in class java.io.FilterInputStream

Throws:

java.io.IOException

getReadIndex

public int getReadIndex()

readPlain

public void readPlain(byte[] buf,
                      int off,
                      int len)

Description copied from interface: LittleEndianInput

Usually acts the same as LittleEndianInput.readFully(byte[], int, int), but for an encrypted stream the raw (unencrypted) data is filled

Specified by:

readPlain in interface LittleEndianInput

Parameters:

buf - the byte array to receive the bytes

off - the start offset into the byte array

len - the amount of bytes to fill

skipFully

public void skipFully(int len)
               throws java.io.IOException

Throws:

java.io.IOException