org.apache.commons.io.input
Class SwappedDataInputStream

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          org.apache.commons.io.input.ProxyInputStream
              org.apache.commons.io.input.SwappedDataInputStream

All Implemented Interfaces:

java.io.Closeable, java.io.DataInput

public class SwappedDataInputStream
extends ProxyInputStream
implements java.io.DataInput

DataInput for systems relying on little endian data formats. When read, values will be changed from little endian to big endian formats for internal usage.

Origin of code: Avalon Excalibur (IO)

Version:

CVS $Revision: 610010 $ $Date: 2008-01-08 14:50:59 +0000 (Tue, 08 Jan 2008) $

Author:

Peter Donald

Field Summary

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

SwappedDataInputStream(java.io.InputStream input)
Constructs a SwappedDataInputStream.

Method Summary

boolean	readBoolean() Return readByte() == 0
byte	readByte() Invokes the delegate's read() method.
char	readChar() Reads a character delegating to readShort().
double	readDouble() Delegates to EndianUtils.readSwappedDouble(InputStream).
float	readFloat() Delegates to EndianUtils.readSwappedFloat(InputStream).
void	readFully(byte[] data) Invokes the delegate's read(byte[] data, int, int) method.
void	readFully(byte[] data, int offset, int length) Invokes the delegate's read(byte[] data, int, int) method.
int	readInt() Delegates to EndianUtils.readSwappedInteger(InputStream).
java.lang.String	readLine() Not currently supported - throws UnsupportedOperationException.
long	readLong() Delegates to EndianUtils.readSwappedLong(InputStream).
short	readShort() Delegates to EndianUtils.readSwappedShort(InputStream).
int	readUnsignedByte() Invokes the delegate's read() method.
int	readUnsignedShort() Delegates to EndianUtils.readSwappedUnsignedShort(InputStream).
java.lang.String	readUTF() Not currently supported - throws UnsupportedOperationException.
int	skipBytes(int count) Invokes the delegate's skip(int) method.

Methods inherited from class org.apache.commons.io.input.ProxyInputStream

available, close, mark, markSupported, read, read, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

SwappedDataInputStream

public SwappedDataInputStream(java.io.InputStream input)

Constructs a SwappedDataInputStream.

Parameters:

input - InputStream to read from

Method Detail

readBoolean

public boolean readBoolean()
                    throws java.io.IOException,
                           java.io.EOFException

Return readByte() == 0

Specified by:

readBoolean in interface java.io.DataInput

Returns:

the true if the byte read is zero, otherwise false

Throws:

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

java.io.EOFException - if an end of file is reached unexpectedly

readByte

public byte readByte()
              throws java.io.IOException,
                     java.io.EOFException

Invokes the delegate's read() method.

Specified by:

readByte in interface java.io.DataInput

Returns:

the byte read or -1 if the end of stream

Throws:

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

java.io.EOFException - if an end of file is reached unexpectedly

readChar

public char readChar()
              throws java.io.IOException,
                     java.io.EOFException

Reads a character delegating to readShort().

Specified by:

readChar in interface java.io.DataInput

Returns:

the byte read or -1 if the end of stream

Throws:

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

java.io.EOFException - if an end of file is reached unexpectedly

readDouble

public double readDouble()
                  throws java.io.IOException,
                         java.io.EOFException

Delegates to EndianUtils.readSwappedDouble(InputStream).

Specified by:

readDouble in interface java.io.DataInput

Returns:

the read long

Throws:

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

java.io.EOFException - if an end of file is reached unexpectedly

readFloat

public float readFloat()
                throws java.io.IOException,
                       java.io.EOFException

Delegates to EndianUtils.readSwappedFloat(InputStream).

Specified by:

readFloat in interface java.io.DataInput

Returns:

the read long

Throws:

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

java.io.EOFException - if an end of file is reached unexpectedly

readFully

public void readFully(byte[] data)
               throws java.io.IOException,
                      java.io.EOFException

Invokes the delegate's read(byte[] data, int, int) method.

Specified by:

readFully in interface java.io.DataInput

Parameters:

data - the buffer to read the bytes into

Throws:

java.io.EOFException - if an end of file is reached unexpectedly

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

readFully

public void readFully(byte[] data,
                      int offset,
                      int length)
               throws java.io.IOException,
                      java.io.EOFException

Invokes the delegate's read(byte[] data, int, int) method.

Specified by:

readFully in interface java.io.DataInput

Parameters:

data - the buffer to read the bytes into

offset - The start offset

length - The number of bytes to read

Throws:

java.io.EOFException - if an end of file is reached unexpectedly

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

readInt

public int readInt()
            throws java.io.IOException,
                   java.io.EOFException

Delegates to EndianUtils.readSwappedInteger(InputStream).

Specified by:

readInt in interface java.io.DataInput

Returns:

the read long

Throws:

java.io.EOFException - if an end of file is reached unexpectedly

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

readLine

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

Not currently supported - throws UnsupportedOperationException.

Specified by:

readLine in interface java.io.DataInput

Returns:

the line read

Throws:

java.io.EOFException - if an end of file is reached unexpectedly

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

readLong

public long readLong()
              throws java.io.IOException,
                     java.io.EOFException

Delegates to EndianUtils.readSwappedLong(InputStream).

Specified by:

readLong in interface java.io.DataInput

Returns:

the read long

Throws:

java.io.EOFException - if an end of file is reached unexpectedly

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

readShort

public short readShort()
                throws java.io.IOException,
                       java.io.EOFException

Delegates to EndianUtils.readSwappedShort(InputStream).

Specified by:

readShort in interface java.io.DataInput

Returns:

the read long

Throws:

java.io.EOFException - if an end of file is reached unexpectedly

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

readUnsignedByte

public int readUnsignedByte()
                     throws java.io.IOException,
                            java.io.EOFException

Invokes the delegate's read() method.

Specified by:

readUnsignedByte in interface java.io.DataInput

Returns:

the byte read or -1 if the end of stream

Throws:

java.io.EOFException - if an end of file is reached unexpectedly

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

readUnsignedShort

public int readUnsignedShort()
                      throws java.io.IOException,
                             java.io.EOFException

Delegates to EndianUtils.readSwappedUnsignedShort(InputStream).

Specified by:

readUnsignedShort in interface java.io.DataInput

Returns:

the read long

Throws:

java.io.EOFException - if an end of file is reached unexpectedly

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

readUTF

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

Not currently supported - throws UnsupportedOperationException.

Specified by:

readUTF in interface java.io.DataInput

Returns:

UTF String read

Throws:

java.io.EOFException - if an end of file is reached unexpectedly

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

skipBytes

public int skipBytes(int count)
              throws java.io.IOException,
                     java.io.EOFException

Invokes the delegate's skip(int) method.

Specified by:

skipBytes in interface java.io.DataInput

Parameters:

count - the number of bytes to skip

Returns:

the number of bytes to skipped or -1 if the end of stream

Throws:

java.io.EOFException - if an end of file is reached unexpectedly

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