com.bigdata.service
Class Split

java.lang.Object
  com.bigdata.service.Split

public class Split
extends Object

Describes a "split" of keys for a batch operation that are spanned by the same index partition.

Version:

$Id: Split.java 2265 2009-10-26 12:51:06Z thompsonbry $

Author:

Bryan Thompson

Field Summary

int	fromIndex Index of the first key in this split.
int	ntuples The #of keys in this split (toIndex - fromIndex).
IPartitionMetadata	pmd The index partition that spans the keys in this split.
int	toIndex Index of the first key NOT included in this split.

Constructor Summary

Split(IPartitionMetadata pmd)
Create a representation of a split point without specifying the from/to tuple index.

Split(IPartitionMetadata pmd, int fromIndex, int toIndex)
Create a representation of a split point.

Method Summary

boolean	equals(Split o)
int	hashCode() Hash code is based on the IPartitionMetadata hash code.
String	toString() Human friendly representation.

Methods inherited from class java.lang.Object

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

Field Detail

pmd

public final IPartitionMetadata pmd

The index partition that spans the keys in this split.

fromIndex

public final int fromIndex

Index of the first key in this split.

toIndex

public final int toIndex

Index of the first key NOT included in this split.

ntuples

public final int ntuples

The #of keys in this split (toIndex - fromIndex).

Constructor Detail

Split

public Split(IPartitionMetadata pmd)

Create a representation of a split point without specifying the from/to tuple index.

Parameters:

pmd - The metadata for the index partition within which the keys in this split lie.

Split

public Split(IPartitionMetadata pmd,
             int fromIndex,
             int toIndex)

Create a representation of a split point.

Parameters:

pmd - The metadata for the index partition within which the keys in this split lie.

fromIndex - The index of the first key that will enter that index partition (inclusive lower bound).

toIndex - The index of the first key that will NOT enter that index partition (exclusive upper bound).

TODO:

The fromKey, toKey in the IPartitionMetadata fully specify the split so the fromIndex,toIndex here are really redundent. Perhaps the help when building an IndexSegment from the Split?

Method Detail

hashCode

public int hashCode()

Hash code is based on the IPartitionMetadata hash code.

Overrides:

hashCode in class Object

equals

public boolean equals(Split o)

toString

public String toString()

Human friendly representation.

Overrides:

toString in class Object