jetbrains.exodus.tree.btree

Class BTreeEmpty

java.lang.Object

jetbrains.exodus.tree.btree.BTreeBase

jetbrains.exodus.tree.btree.BTreeEmpty

All Implemented Interfaces:

ITree

public class BTreeEmpty
extends BTreeBase

Field Summary

Fields inherited from class jetbrains.exodus.tree.btree.BTreeBase

allowsDuplicates, balancePolicy, BOTTOM, BOTTOM_ROOT, dataIterator, DUP_BOTTOM, DUP_INTERNAL, DUP_LEAF, INTERNAL, INTERNAL_ROOT, LEAF, LEAF_DUP_BOTTOM_ROOT, LEAF_DUP_INTERNAL_ROOT, log, size, structureId

Constructor Summary

Constructors

Constructor and Description
BTreeEmpty(@NotNull jetbrains.exodus.log.Log log, boolean allowsDuplicates, int structureId)
BTreeEmpty(@NotNull jetbrains.exodus.log.Log log, @NotNull BTreeBalancePolicy balancePolicy, boolean allowsDuplicates, int structureId)

Method Summary

Modifier and Type	Method and Description
@NotNull BTreeMutable	getMutableCopy()
protected @NotNull jetbrains.exodus.tree.btree.BasePage	getRoot() Returns root page of the tree
long	getRootAddress()
boolean	hasKey(@NotNull jetbrains.exodus.ByteIterable key)
boolean	hasPair(@NotNull jetbrains.exodus.ByteIterable key, @NotNull jetbrains.exodus.ByteIterable value)
boolean	isEmpty()
ITreeCursor	openCursor()

Methods inherited from class jetbrains.exodus.tree.btree.BTreeBase

addressIterator, dump, dump, get, getBalancePolicy, getDataIterator, getLog, getLoggable, getSize, getStructureId, isDupKey, loadLeaf, loadPage, loadPage

Methods inherited from class java.lang.Object

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

Constructor Detail

BTreeEmpty

public BTreeEmpty(@NotNull
                  @NotNull jetbrains.exodus.log.Log log,
                  @NotNull
                  @NotNull BTreeBalancePolicy balancePolicy,
                  boolean allowsDuplicates,
                  int structureId)

BTreeEmpty

public BTreeEmpty(@NotNull
                  @NotNull jetbrains.exodus.log.Log log,
                  boolean allowsDuplicates,
                  int structureId)

Method Detail

getMutableCopy

@NotNull
public @NotNull BTreeMutable getMutableCopy()

Specified by:

getMutableCopy in interface ITree

Specified by:

getMutableCopy in class BTreeBase

getRootAddress

public long getRootAddress()

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface ITree

Overrides:

isEmpty in class BTreeBase

openCursor

public ITreeCursor openCursor()

Specified by:

openCursor in interface ITree

Overrides:

openCursor in class BTreeBase

hasKey

public boolean hasKey(@NotNull
                      @NotNull jetbrains.exodus.ByteIterable key)

Specified by:

hasKey in interface ITree

Overrides:

hasKey in class BTreeBase

hasPair

public boolean hasPair(@NotNull
                       @NotNull jetbrains.exodus.ByteIterable key,
                       @NotNull
                       @NotNull jetbrains.exodus.ByteIterable value)

Specified by:

hasPair in interface ITree

Overrides:

hasPair in class BTreeBase

getRoot

@NotNull
protected @NotNull jetbrains.exodus.tree.btree.BasePage getRoot()

Description copied from class: BTreeBase

Returns root page of the tree

Specified by:

getRoot in class BTreeBase

Returns:

tree root