ucar.unidata.io
Class BeLeDataInputStream

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          java.io.DataInputStream
              ucar.unidata.io.BeLeDataInputStream

All Implemented Interfaces:

java.io.Closeable, java.io.DataInput

public class BeLeDataInputStream
extends java.io.DataInputStream

Big-endian little-endian data input stream, from which numbers in both big- and little-endian representations can be read. This is needed for ESRI shapefiles, for example, since they contain both big- and little-endian representations.

Version:

$Id: BeLeDataInputStream.java 64 2006-07-12 22:30:50Z edavis $

Author:

Russ Rew

Constructor Summary

BeLeDataInputStream(java.io.InputStream inputStream)
Construct a bigEndian-littleEndian input stream from an input stream.

BeLeDataInputStream(java.lang.String filename)
Construct a bigEndian-littleEndian input stream from a file.

BeLeDataInputStream(java.net.URL url)
Construct a bigEndian-littleEndian input stream from a URL.

Method Summary

double	readLEDouble() read a double in little endian format
void	readLEDoubles(double[] d, int n) Reads n little-endian doubles from a random access file.
float	readLEFloat() read an int in little endian format
int	readLEInt() read an int in little endian format
long	readLELong() read a long in little endian format
void	readLELongs(long[] lbuf, int n) Reads n little-endian longs from a random access file.

Methods inherited from class java.io.DataInputStream

read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, readUTF, skipBytes

Methods inherited from class java.io.FilterInputStream

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

Methods inherited from class java.lang.Object

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

Constructor Detail

BeLeDataInputStream

public BeLeDataInputStream(java.io.InputStream inputStream)
                    throws java.io.IOException

Construct a bigEndian-littleEndian input stream from an input stream.

Parameters:

inputStream - from which to read

Throws:

java.io.IOException - on read error

BeLeDataInputStream

public BeLeDataInputStream(java.lang.String filename)
                    throws java.io.IOException

Construct a bigEndian-littleEndian input stream from a file.

Parameters:

filename - of file

Throws:

java.io.IOException - on read error

BeLeDataInputStream

public BeLeDataInputStream(java.net.URL url)
                    throws java.io.IOException

Construct a bigEndian-littleEndian input stream from a URL.

Parameters:

url - of remote data

Throws:

java.io.IOException - if there was a problem reading the file.

Method Detail

readLEInt

public int readLEInt()
              throws java.io.IOException

read an int in little endian format

Returns:

int created from next 4 bytes in stream, in littleEndian order

Throws:

java.io.IOException - on read error

readLEFloat

public float readLEFloat()
                  throws java.io.IOException

read an int in little endian format

Returns:

int created from next 4 bytes in stream, in littleEndian order

Throws:

java.io.IOException - on read error

readLEDouble

public double readLEDouble()
                    throws java.io.IOException

read a double in little endian format

Returns:

double from next 8 bytes in stream, littleEndian order

Throws:

java.io.IOException - on read error

readLEDoubles

public final void readLEDoubles(double[] d,
                                int n)
                         throws java.io.IOException

Reads n little-endian doubles from a random access file.

This method is provided for speed when accessing a number of consecutive values of the same type.

Parameters:

d - the buffer into which the doubles are read

n - number of little-endian doubles to read

Throws:

java.io.IOException - on read error

readLELong

public long readLELong()
                throws java.io.IOException

read a long in little endian format

Returns:

long from next 8 bytes in stream, littleEndian order

Throws:

java.io.IOException - on read error

readLELongs

public final void readLELongs(long[] lbuf,
                              int n)
                       throws java.io.IOException

Reads n little-endian longs from a random access file.

This method is provided for speed when accessing a number of consecutive values of the same type.

Parameters:

lbuf - the buffer into which the longs are read

n - the number of little-endian longs to read

Throws:

java.io.IOException - on read error