Module org.apache.jena.core

Package org.apache.jena.mem.store.strategies

Class MinimalStoreStrategy

java.lang.Object

org.apache.jena.mem.store.strategies.MinimalStoreStrategy

All Implemented Interfaces:

StoreStrategy

public class MinimalStoreStrategy
extends Object
implements StoreStrategy

StoreStrategy that never builds an index but still answers pattern-match operations - by linearly filtering the triple set. Useful when the dataset is small or when memory is more precious than match-time performance.

Used to back IndexingStrategy.MINIMAL. The user can switch to eager indexing at any time by calling GraphMemIndexedSet.initializeIndex(); calling clearIndex reverts to filtering again.

Constructor Summary

Constructors

Constructor	Description
MinimalStoreStrategy(FastHashSet<Triple> triples)

Method Summary

Modifier and Type	Method	Description
void	addToIndex(Triple triple, int index)	Notify the strategy that a triple was added to the underlying triple set at the given index.
void	clearIndex()	Discard any auxiliary index data held by the strategy.
boolean	containsAnyAnyObj(Node o)
boolean	containsAnyPreAny(Node p)
boolean	containsAnyPreObj(Node p, Node o)
boolean	containsSubAnyAny(Node s)
boolean	containsSubAnyObj(Node s, Node o)
boolean	containsSubPreAny(Node s, Node p)
ExtendedIterator<Triple>	findAnyAnyObj(Node o)
ExtendedIterator<Triple>	findAnyPreAny(Node p)
ExtendedIterator<Triple>	findAnyPreObj(Node p, Node o)
ExtendedIterator<Triple>	findSubAnyAny(Node s)
ExtendedIterator<Triple>	findSubAnyObj(Node s, Node o)
ExtendedIterator<Triple>	findSubPreAny(Node s, Node p)
void	removeFromIndex(Triple triple, int index)	Notify the strategy that the triple at the given index has been removed from the underlying triple set.
Stream<Triple>	streamAnyAnyObj(Node o)
Stream<Triple>	streamAnyPreAny(Node p)
Stream<Triple>	streamAnyPreObj(Node p, Node o)
Stream<Triple>	streamSubAnyAny(Node s)
Stream<Triple>	streamSubAnyObj(Node s, Node o)
Stream<Triple>	streamSubPreAny(Node s, Node p)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jena.mem.store.strategies.StoreStrategy

isIndexInitialized

Constructor Details

MinimalStoreStrategy

public MinimalStoreStrategy(FastHashSet<Triple> triples)

Parameters:

triples - the canonical triple set to filter against

Method Details

addToIndex

public void addToIndex(Triple triple,
 int index)

Description copied from interface: StoreStrategy

Notify the strategy that a triple was added to the underlying triple set at the given index. Implementations that maintain an index must update it; implementations without an index are free to no-op.

Specified by:

addToIndex in interface StoreStrategy

Parameters:

triple - the newly added triple

index - the stable index it now occupies in the triple set

removeFromIndex

public void removeFromIndex(Triple triple,
 int index)

Description copied from interface: StoreStrategy

Notify the strategy that the triple at the given index has been removed from the underlying triple set. Implementations that maintain an index must remove the triple from it; implementations without an index are free to no-op.

Specified by:

removeFromIndex in interface StoreStrategy

Parameters:

triple - the removed triple

index - the index it occupied immediately before removal

clearIndex

public void clearIndex()

Description copied from interface: StoreStrategy

Discard any auxiliary index data held by the strategy. Implementations without an index may no-op.

Specified by:

clearIndex in interface StoreStrategy

containsSubAnyAny

public boolean containsSubAnyAny(Node s)

Specified by:

containsSubAnyAny in interface StoreStrategy

containsAnyPreAny

public boolean containsAnyPreAny(Node p)

Specified by:

containsAnyPreAny in interface StoreStrategy

containsAnyAnyObj

public boolean containsAnyAnyObj(Node o)

Specified by:

containsAnyAnyObj in interface StoreStrategy

containsSubPreAny

public boolean containsSubPreAny(Node s,
 Node p)

Specified by:

containsSubPreAny in interface StoreStrategy

containsSubAnyObj

public boolean containsSubAnyObj(Node s,
 Node o)

Specified by:

containsSubAnyObj in interface StoreStrategy

containsAnyPreObj

public boolean containsAnyPreObj(Node p,
 Node o)

Specified by:

containsAnyPreObj in interface StoreStrategy

streamSubAnyAny

public Stream<Triple> streamSubAnyAny(Node s)

Specified by:

streamSubAnyAny in interface StoreStrategy

streamAnyPreAny

public Stream<Triple> streamAnyPreAny(Node p)

Specified by:

streamAnyPreAny in interface StoreStrategy

streamAnyAnyObj

public Stream<Triple> streamAnyAnyObj(Node o)

Specified by:

streamAnyAnyObj in interface StoreStrategy

streamSubPreAny

public Stream<Triple> streamSubPreAny(Node s,
 Node p)

Specified by:

streamSubPreAny in interface StoreStrategy

streamSubAnyObj

public Stream<Triple> streamSubAnyObj(Node s,
 Node o)

Specified by:

streamSubAnyObj in interface StoreStrategy

streamAnyPreObj

public Stream<Triple> streamAnyPreObj(Node p,
 Node o)

Specified by:

streamAnyPreObj in interface StoreStrategy

findSubAnyAny

public ExtendedIterator<Triple> findSubAnyAny(Node s)

Specified by:

findSubAnyAny in interface StoreStrategy

findAnyPreAny

public ExtendedIterator<Triple> findAnyPreAny(Node p)

Specified by:

findAnyPreAny in interface StoreStrategy

findAnyAnyObj

public ExtendedIterator<Triple> findAnyAnyObj(Node o)

Specified by:

findAnyAnyObj in interface StoreStrategy

findSubPreAny

public ExtendedIterator<Triple> findSubPreAny(Node s,
 Node p)

Specified by:

findSubPreAny in interface StoreStrategy

findSubAnyObj

public ExtendedIterator<Triple> findSubAnyObj(Node s,
 Node o)

Specified by:

findSubAnyObj in interface StoreStrategy

findAnyPreObj

public ExtendedIterator<Triple> findAnyPreObj(Node p,
 Node o)

Specified by:

findAnyPreObj in interface StoreStrategy