de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.deliclu

Class DeLiCluTree

java.lang.Object

de.lmu.ifi.dbs.elki.index.tree.IndexTree<N,E>

de.lmu.ifi.dbs.elki.index.tree.spatial.SpatialIndexTree<N,E>

de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.AbstractRStarTree<N,E>

de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.NonFlatRStarTree<DeLiCluNode,DeLiCluEntry>

de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.deliclu.DeLiCluTree

Direct Known Subclasses:

DeLiCluTreeIndex

public class DeLiCluTree
extends NonFlatRStarTree<DeLiCluNode,DeLiCluEntry>

DeLiCluTree is a spatial index structure based on an R-TRee. DeLiCluTree is designed for the DeLiClu algorithm, having in each node a boolean array which indicates whether the child nodes are already handled by the DeLiClu algorithm.

Field Summary

Fields

Modifier and Type	Field and Description
private HashMap<Integer,HashSet<Integer>>	expanded Holds the ids of the expanded nodes.
private static Logging	logger The logger for this class.

Fields inherited from class de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.AbstractRStarTree

bulkSplitter, distanceCalcs, extraIntegrityChecks, height, insertionStrategy, nodeSplitter, reinsertions

Fields inherited from class de.lmu.ifi.dbs.elki.index.tree.IndexTree

dirCapacity, dirMinimum, initialized, leafCapacity, leafMinimum

Constructor Summary

Constructors

Constructor and Description
DeLiCluTree(PageFile<DeLiCluNode> pagefile, BulkSplit bulkSplitter, InsertionStrategy insertionStrategy) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected DeLiCluEntry	createNewDirectoryEntry(DeLiCluNode node) Creates a new directory entry representing the specified node.
protected DeLiCluNode	createNewDirectoryNode() Creates a new directory node with the specified capacity.
protected DeLiCluNode	createNewLeafNode() Creates a new leaf node with the specified capacity.
protected DeLiCluEntry	createRootEntry() Creates an entry representing the root node.
Set<Integer>	getExpanded(DeLiCluNode entry) Returns the nodes which are already expanded with the specified node.
Set<Integer>	getExpanded(SpatialEntry entry) Returns the nodes which are already expanded with the specified node.
protected Logging	getLogger() Get the (STATIC) logger for this class.
int	numNodes() Determines and returns the number of nodes in this index.
void	setExpanded(SpatialEntry entry1, SpatialEntry entry2) Marks the nodes with the specified ids as expanded.

Methods inherited from class de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.NonFlatRStarTree

bulkLoad, computeHeight, createEmptyRoot, hasOverflow, hasUnderflow

Methods inherited from class de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.AbstractRStarTree

adjustTree, canBulkLoad, choosePath, clearReinsertions, containedTest, createBulkLeafNodes, createNewRoot, deletePath, doExtraIntegrityChecks, findPathToObject, getHeight, getLeaves, initializeCapacities, initializeFromFile, insertDirectoryEntry, insertLeaf, insertLeafEntry, reInsert, setHeight, toString

Methods inherited from class de.lmu.ifi.dbs.elki.index.tree.IndexTree

createHeader, deleteNode, getFile, getNode, getNode, getPageFileStatistics, getPageID, getPageSize, getRoot, getRootEntry, getRootID, getRootPath, initialize, initialize, isRoot, postDelete, preInsert, writeNode

Methods inherited from class java.lang.Object

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

Field Detail

logger

private static final Logging logger

The logger for this class.

expanded

private HashMap<Integer,HashSet<Integer>> expanded

Holds the ids of the expanded nodes.

Constructor Detail

DeLiCluTree

public DeLiCluTree(PageFile<DeLiCluNode> pagefile,
           BulkSplit bulkSplitter,
           InsertionStrategy insertionStrategy)

Constructor.

Parameters:

pagefile - Page file

bulkSplitter - bulk load strategy

insertionStrategy - the strategy to find the insertion child

Method Detail

setExpanded

public void setExpanded(SpatialEntry entry1,
               SpatialEntry entry2)

Marks the nodes with the specified ids as expanded.

Parameters:

entry1 - the first node

entry2 - the second node

getExpanded

public Set<Integer> getExpanded(SpatialEntry entry)

Returns the nodes which are already expanded with the specified node.

Parameters:

entry - the id of the node for which the expansions should be returned

Returns:

the nodes which are already expanded with the specified node

getExpanded

public Set<Integer> getExpanded(DeLiCluNode entry)

Returns the nodes which are already expanded with the specified node.

Parameters:

entry - the id of the node for which the expansions should be returned

Returns:

the nodes which are already expanded with the specified node

numNodes

public int numNodes()

Determines and returns the number of nodes in this index.

Returns:

the number of nodes in this index

createNewLeafNode

protected DeLiCluNode createNewLeafNode()

Creates a new leaf node with the specified capacity.

Specified by:

createNewLeafNode in class IndexTree<DeLiCluNode,DeLiCluEntry>

Returns:

a new leaf node

createNewDirectoryNode

protected DeLiCluNode createNewDirectoryNode()

Creates a new directory node with the specified capacity.

Specified by:

createNewDirectoryNode in class IndexTree<DeLiCluNode,DeLiCluEntry>

Returns:

a new directory node

createNewDirectoryEntry

protected DeLiCluEntry createNewDirectoryEntry(DeLiCluNode node)

Creates a new directory entry representing the specified node.

Specified by:

createNewDirectoryEntry in class AbstractRStarTree<DeLiCluNode,DeLiCluEntry>

Parameters:

node - the node to be represented by the new entry

Returns:

the newly created directory entry

createRootEntry

protected DeLiCluEntry createRootEntry()

Creates an entry representing the root node.

Specified by:

createRootEntry in class IndexTree<DeLiCluNode,DeLiCluEntry>

Returns:

an entry representing the root node

getLogger

protected Logging getLogger()

Description copied from class: IndexTree

Get the (STATIC) logger for this class.

Specified by:

getLogger in class IndexTree<DeLiCluNode,DeLiCluEntry>

Returns:

the static logger