com.sleepycat.je.tree

Class INTargetRep

java.lang.Object

com.sleepycat.je.tree.INArrayRep<INTargetRep,INTargetRep.Type,Node>

com.sleepycat.je.tree.INTargetRep

Direct Known Subclasses:

INTargetRep.Default, INTargetRep.None, INTargetRep.Sparse

public abstract class INTargetRep
extends INArrayRep<INTargetRep,INTargetRep.Type,Node>

The abstract class that defines the various representations used to represent an array of target pointers to children of an IN node. These arrays can be sparse, so the non-default representations are designed to make efficient representations for the sparse cases. Each specialized representation is a subclass of INTargetReps. A new IN node starts out with the None representation and grows through a sparse into the full default representation. Subsequently, the default representation can be compacted into a Sparse or None representation whenever an IN is stripped. Note that representations do not currently move to more compact forms when entries are nulled to minimize the possibility of tansitionary representation changes, since each representation change has a cpu cost and a gc cost associated with it.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	INTargetRep.Default
static class	INTargetRep.None Representation used when an IN has no children cached.
static class	INTargetRep.Sparse Representation used when 1-4 children are cached.
static class	INTargetRep.Type

Field Summary

Fields

Modifier and Type	Field and Description
static INTargetRep.None	NONE

Constructor Summary

Constructors

Constructor and Description
INTargetRep()

Method Summary

Methods inherited from class com.sleepycat.je.tree.INArrayRep

calculateMemorySize, compact, copy, get, getType, resize, set

Methods inherited from class java.lang.Object

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

Field Detail

NONE

public static final INTargetRep.None NONE

Constructor Detail

INTargetRep

public INTargetRep()