com.stc.eways.batchext
Class BatchByteArrayInputStream

java.lang.Object
  java.io.InputStream
      java.io.ByteArrayInputStream
          com.stc.eways.batchext.BatchByteArrayInputStream

All Implemented Interfaces:

java.io.Closeable

public class BatchByteArrayInputStream
extends java.io.ByteArrayInputStream

This is a simple extension of the java.io.ByteArrayInputStream. Unfortunately, the ByteArrayInputStream does not support skipping backwards. That functionality is required for any input stream in record parsing so this class overrides the skip method to allow for passing in a negative offset.

Version:

$Revision: 1.4 $

Author:

jim.fu@sun.com

See Also:

BatchRecordParser, InputStreamFindAdapter

Field Summary

Fields inherited from class java.io.ByteArrayInputStream

buf, count, mark, pos

Constructor Summary

BatchByteArrayInputStream(byte[] buff)
Pass-through constructor.

BatchByteArrayInputStream(byte[] buff, int off, int len)
Pass-through constructor.

Method Summary

long	skip(long n) Override of the skip method in the base class.

Methods inherited from class java.io.ByteArrayInputStream

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

Methods inherited from class java.io.InputStream

read

Methods inherited from class java.lang.Object

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

Constructor Detail

BatchByteArrayInputStream

public BatchByteArrayInputStream(byte[] buff)

Pass-through constructor.

BatchByteArrayInputStream

public BatchByteArrayInputStream(byte[] buff,
                                 int off,
                                 int len)

Pass-through constructor.

Method Detail

skip

public long skip(long n)

Override of the skip method in the base class. Allow for skipping backwards. The override is fairly simple minded. If the 'n' param is greater than or equal to zero, just call the base class. Otherwise, if negative, back up the position by that amount. If the resulting pos is less than zero, adjust to zero. No other range checking is done.

Overrides:

skip in class java.io.ByteArrayInputStream

Parameters:

n - The number of bytes to skip.

Returns:

If 'n' is greater than or equal to zero, return whatever the base class returns. If negative, returns 'n'.