com.partnersoft.io.formats

Class FastDataInputStream

java.lang.Object

java.io.InputStream

com.partnersoft.io.formats.FastDataInputStream

All Implemented Interfaces:

java.io.Closeable, java.io.DataInput, java.lang.AutoCloseable

public class FastDataInputStream
extends java.io.InputStream
implements java.io.DataInput

A self-buffering data input stream. Has the following advantages over the usual DataInputStream->BufferedInputStream setup:

• can be reset to point at a new InputStream w/o creating a new FastDataInputStream object.
• combines interpretation of data with buffering (so e.g. readInt() doesn't have to call readByte() etc.)
• is designed to create as few objects as possible - all arrays are grown rather than instantiated, for example.
• includes methods for reading arrays of floats, ints, etc. directly.

Author:

Paul Reavis Copyright 2001 Partner Software, Inc.

Constructor Summary

Constructors

Constructor and Description
FastDataInputStream()
FastDataInputStream(java.io.InputStream innie)
FastDataInputStream(java.io.InputStream innie, int bufferSize)
FastDataInputStream(int bufferSize)

Method Summary

Methods

Modifier and Type	Method and Description
int	available()
void	close()
long	getPosition()
void	mark(int readLimit)
boolean	markSupported()
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
void	read(ByteBuffer buffer, int numBytes)
java.lang.String	readASCII(int bytecount)
boolean	readBoolean()
byte	readByte()
char	readChar()
double	readDouble()
float	readFloat()
FloatBuffer	readFloats(int numFloats) Reads an entire array of floats in at once and returns them as a FloatBuffer - which you should treat as read only, here me?
void	readFully(byte[] b)
void	readFully(byte[] b, int off, int len)
int	readInt()
short	readInt16()
int	readInt32()
int	readInt8()
java.lang.String	readLine()
int	readLine(byte[] b) Reads until it hits some end of line (\r, \n) character or until buffer is full.
long	readLong()
short	readShort()
int	readUInt16()
long	readUInt32()
int	readUInt8()
int	readUnsignedByte()
long	readUnsignedInt()
int	readUnsignedShort()
java.lang.String	readUTF()
CharBuffer	readUTFAsBuffer()
void	reset()
void	setInput(java.io.InputStream innie)
long	skip(long n)
int	skipBytes(int n)

Methods inherited from class java.lang.Object

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

Constructor Detail

FastDataInputStream

public FastDataInputStream(int bufferSize)

FastDataInputStream

public FastDataInputStream()

FastDataInputStream

public FastDataInputStream(java.io.InputStream innie)

FastDataInputStream

public FastDataInputStream(java.io.InputStream innie,
                   int bufferSize)

Method Detail

read

public void read(ByteBuffer buffer,
        int numBytes)
          throws java.io.IOException

Throws:

java.io.IOException

getPosition

public long getPosition()

read

public int read()
         throws java.io.IOException

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

read

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

Overrides:

read in class java.io.InputStream

Throws:

java.io.IOException

read

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

Overrides:

read in class java.io.InputStream

Throws:

java.io.IOException

skip

public long skip(long n)
          throws java.io.IOException

Overrides:

skip in class java.io.InputStream

Throws:

java.io.IOException

available

public int available()
              throws java.io.IOException

Overrides:

available in class java.io.InputStream

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.InputStream

Throws:

java.io.IOException

mark

public void mark(int readLimit)

Overrides:

mark in class java.io.InputStream

reset

public void reset()
           throws java.io.IOException

Overrides:

reset in class java.io.InputStream

Throws:

java.io.IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class java.io.InputStream

readFully

public void readFully(byte[] b)
               throws java.io.IOException

Specified by:

readFully in interface java.io.DataInput

Throws:

java.io.IOException

readLine

public int readLine(byte[] b)
             throws java.io.IOException

Reads until it hits some end of line (\r, \n) character or until buffer is full. Fills with nulls, returns actual length. This method should probably not be mixed with others, due to possible weirdnesses in overlap, since it is of indeterminate actual bytelength.

Throws:

java.io.IOException

readFully

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

Specified by:

readFully in interface java.io.DataInput

Throws:

java.io.IOException

skipBytes

public int skipBytes(int n)
              throws java.io.IOException

Specified by:

skipBytes in interface java.io.DataInput

Throws:

java.io.IOException

readBoolean

public boolean readBoolean()
                    throws java.io.IOException

Specified by:

readBoolean in interface java.io.DataInput

Throws:

java.io.IOException

readByte

public byte readByte()
              throws java.io.IOException

Specified by:

readByte in interface java.io.DataInput

Throws:

java.io.IOException

readUnsignedByte

public int readUnsignedByte()
                     throws java.io.IOException

Specified by:

readUnsignedByte in interface java.io.DataInput

Throws:

java.io.IOException

readShort

public short readShort()
                throws java.io.IOException

Specified by:

readShort in interface java.io.DataInput

Throws:

java.io.IOException

readUnsignedShort

public int readUnsignedShort()
                      throws java.io.IOException

Specified by:

readUnsignedShort in interface java.io.DataInput

Throws:

java.io.IOException

readChar

public char readChar()
              throws java.io.IOException

Specified by:

readChar in interface java.io.DataInput

Throws:

java.io.IOException

readUnsignedInt

public long readUnsignedInt()
                     throws java.io.IOException

Throws:

java.io.IOException

readInt

public int readInt()
            throws java.io.IOException

Specified by:

readInt in interface java.io.DataInput

Throws:

java.io.IOException

readLong

public long readLong()
              throws java.io.IOException

Specified by:

readLong in interface java.io.DataInput

Throws:

java.io.IOException

readFloat

public float readFloat()
                throws java.io.IOException

Specified by:

readFloat in interface java.io.DataInput

Throws:

java.io.IOException

readDouble

public double readDouble()
                  throws java.io.IOException

Specified by:

readDouble in interface java.io.DataInput

Throws:

java.io.IOException

readLine

public java.lang.String readLine()
                          throws java.io.IOException

Specified by:

readLine in interface java.io.DataInput

Throws:

java.io.IOException

readUTF

public java.lang.String readUTF()
                         throws java.io.IOException

Specified by:

readUTF in interface java.io.DataInput

Throws:

java.io.IOException

readASCII

public java.lang.String readASCII(int bytecount)
                           throws java.io.IOException

Throws:

java.io.IOException

readUInt8

public int readUInt8()
              throws java.io.IOException

Throws:

java.io.IOException

readInt8

public int readInt8()
             throws java.io.IOException

Throws:

java.io.IOException

readInt32

public int readInt32()
              throws java.io.IOException

Throws:

java.io.IOException

readUInt32

public long readUInt32()
                throws java.io.IOException

Throws:

java.io.IOException

readInt16

public short readInt16()
                throws java.io.IOException

Throws:

java.io.IOException

readUInt16

public int readUInt16()
               throws java.io.IOException

Throws:

java.io.IOException

setInput

public void setInput(java.io.InputStream innie)

readFloats

public FloatBuffer readFloats(int numFloats)
                       throws java.io.IOException

Reads an entire array of floats in at once and returns them as a FloatBuffer - which you should treat as read only, here me?

Throws:

java.io.IOException

readUTFAsBuffer

public CharBuffer readUTFAsBuffer()
                           throws java.io.IOException

Throws:

java.io.IOException