com.bigdata.rdf.spo

Class SPOAccessPath

java.lang.Object

com.bigdata.relation.accesspath.AccessPath<ISPO>

com.bigdata.rdf.spo.SPOAccessPath

All Implemented Interfaces:

IAbstractAccessPath<ISPO>, IAccessPath<ISPO>, IBindingSetAccessPath<ISPO>

public class SPOAccessPath
extends AccessPath<ISPO>

IAccessPath implementation for an SPORelation.

Author:

Bryan Thompson

Field Summary

Fields inherited from class com.bigdata.relation.accesspath.AccessPath

accessPathFilter, chunkCapacity, chunkOfChunksCapacity, flags, fullyBufferedReadThreshold, indexLocalFilter, indexManager, keyOrder, log, MAX_FULLY_BUFFERED_READ_LIMIT, ndx, predicate, timestamp

Constructor Summary

Constructors

Constructor and Description
SPOAccessPath(IRelation<ISPO> relation, IIndexManager localIndexManager, IPredicate<ISPO> predicate, IKeyOrder<ISPO> keyOrder)

Method Summary

Methods

Modifier and Type	Method and Description
SPOPredicate	getPredicate() Strengthened return type.
SPORelation	getRelation() Strengthened return type.
SPOAccessPath	init() Strengthens the return type.
long	removeAll() Overridden to delegate to AbstractTripleStore.removeStatements(IChunkedOrderedIterator) in order to (a) write on all access paths; (b) handle statement identifiers, including truth maintenance for statement identifiers; and (c) if justifications are being maintained, then retract justifications having no support once the statements visitable by this access path have been retracted.

Methods inherited from class com.bigdata.relation.accesspath.AccessPath

assertInitialized, asynchronousIterator, estimateCost, getChunkCapacity, getChunkOfChunksCapacity, getFromKey, getIndex, getIndexManager, getKeyOrder, getTimestamp, getToKey, hasFilter, isEmpty, isFullyBoundForKey, iterator, iterator, rangeCount, rangeIterator, solutions, synchronousIterator, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SPOAccessPath

public SPOAccessPath(IRelation<ISPO> relation,
             IIndexManager localIndexManager,
             IPredicate<ISPO> predicate,
             IKeyOrder<ISPO> keyOrder)

Parameters:

relation - (optional).

indexManager - (required)

timestamp -

predicate -

keyOrder -

Method Detail

init

public SPOAccessPath init()

Strengthens the return type.

Required post-ctor initialization.

Overrides:

init in class AccessPath<ISPO>

Returns:

this

getRelation

public SPORelation getRelation()

Strengthened return type.

Overrides:

getRelation in class AccessPath<ISPO>

getPredicate

public SPOPredicate getPredicate()

Strengthened return type.

The constraints on the IAccessPath.

Specified by:

getPredicate in interface IAbstractAccessPath<ISPO>

Overrides:

getPredicate in class AccessPath<ISPO>

removeAll

public long removeAll()

Overridden to delegate to AbstractTripleStore.removeStatements(IChunkedOrderedIterator) in order to (a) write on all access paths; (b) handle statement identifiers, including truth maintenance for statement identifiers; and (c) if justifications are being maintained, then retract justifications having no support once the statements visitable by this access path have been retracted.

Specified by:

removeAll in interface IAbstractAccessPath<ISPO>

Overrides:

removeAll in class AccessPath<ISPO>

Returns:

The #of elements that were removed.