Package com.tangosol.io.pof

Class PofDeltaCompressor.ChangeTracker

java.lang.Object

com.tangosol.io.pof.PofDeltaCompressor.ChangeTracker

Enclosing class:

PofDeltaCompressor

protected static class PofDeltaCompressor.ChangeTracker
extends Object

When determining a delta between two POF buffers, the ChangeTracker keeps track of whether the current location within the two POF streams is part of a differing portion or part of an identical portion.

Constructor Summary

Constructors

Constructor	Description
ChangeTracker(ReadBuffer.BufferInput inOld, ReadBuffer.BufferInput inNew)	Construct a ChangeTracker that will produce a delta between the two passed streams.

Method Summary

Modifier and Type	Method	Description
void	advance(boolean fSame)	Update the tracker to indicate that the most recently scanned region was the same or different.
Binary	getDelta()	Obtain the final delta result as a Binary value.

Methods inherited from class java.lang.Object

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

Constructor Detail

ChangeTracker

public ChangeTracker(ReadBuffer.BufferInput inOld,
                     ReadBuffer.BufferInput inNew)
              throws IOException

Construct a ChangeTracker that will produce a delta between the two passed streams.

Parameters:

inOld - the BuferInput for the old value

inNew - the BuferInput for the new value

Throws:

IOException - if some use of the underlying streams throws an exception

Method Detail

advance

public void advance(boolean fSame)
             throws IOException

Update the tracker to indicate that the most recently scanned region was the same or different.

Parameters:

fSame - pass true if the most recently scanned region of the streams was identical; false otherwise

Throws:

IOException - if some use of the underlying streams throws an exception

getDelta

public Binary getDelta()
                throws IOException

Obtain the final delta result as a Binary value.

Returns:

a Binary containing the delta value

Throws:

IOException - if some use of the underlying streams throws an exception