org.neo4j.storageengine.api.schema

Interface IndexReader

All Superinterfaces:

AutoCloseable, org.neo4j.graphdb.Resource

public interface IndexReader
extends org.neo4j.graphdb.Resource

Reader for an index. Must honor repeatable reads, which means that if a lookup is executed multiple times the same result set must be returned.

Field Summary

Fields

Modifier and Type	Field and Description
static IndexReader	EMPTY

Method Summary

Modifier and Type	Method and Description
long	countIndexedNodes(long nodeId, Object... propertyValues)
IndexSampler	createSampler()
org.neo4j.collection.primitive.PrimitiveLongIterator	query(org.neo4j.kernel.api.schema.IndexQuery... predicates) Queries the index for the given IndexQuery predicates.

Methods inherited from interface org.neo4j.graphdb.Resource

close

Field Detail

EMPTY

static final IndexReader EMPTY

Method Detail

countIndexedNodes

long countIndexedNodes(long nodeId,
                       Object... propertyValues)

Parameters:

nodeId - node if to match.

propertyValues - property values to match.

Returns:

number of index entries for the given nodeId and propertyValue.

createSampler

IndexSampler createSampler()

query

org.neo4j.collection.primitive.PrimitiveLongIterator query(org.neo4j.kernel.api.schema.IndexQuery... predicates)
                                                    throws org.neo4j.kernel.api.exceptions.index.IndexNotApplicableKernelException

Queries the index for the given IndexQuery predicates.

Parameters:

predicates - the predicates to query for.

Returns:

the matching entity IDs.

Throws:

org.neo4j.kernel.api.exceptions.index.IndexNotApplicableKernelException