Package org.neo4j.gds.core.loading

Interface PropertyReader

All Known Implementing Classes:

PropertyReader.Buffered

public interface PropertyReader

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	PropertyReader.Buffered

Method Summary

Modifier and Type	Method	Description
static PropertyReader.Buffered	buffered(int batchSize, int propertyCount)
static PropertyReader	preLoaded()
long[][]	readProperty(long[] relationshipReferences, org.neo4j.gds.compat.PropertyReference[] propertyReferences, int numberOfReferences, int[] propertyKeyIds, double[] defaultValues, org.neo4j.gds.core.Aggregation[] aggregations, boolean atLeastOnePropertyToLoad)	Load the relationship properties for the given batch of relationships.
static PropertyReader	storeBacked(org.neo4j.kernel.api.KernelTransaction kernelTransaction)

Method Detail

readProperty

long[][] readProperty(long[] relationshipReferences,
                      org.neo4j.gds.compat.PropertyReference[] propertyReferences,
                      int numberOfReferences,
                      int[] propertyKeyIds,
                      double[] defaultValues,
                      org.neo4j.gds.core.Aggregation[] aggregations,
                      boolean atLeastOnePropertyToLoad)

Load the relationship properties for the given batch of relationships. Relationships are represented as two arrays from the RelationshipsBatchBuffer.

Parameters:

relationshipReferences - relationship references (IDs)

propertyReferences - property references (IDs or References)

numberOfReferences - number of valid entries in the first two arrays

propertyKeyIds - property key ids to load

defaultValues - default weight for each property key

aggregations - the aggregation for each property

atLeastOnePropertyToLoad - true iff there is at least one value in propertyKeyIds that is not StatementConstants.NO_SUCH_PROPERTY_KEY (-1).

Returns:

list of property values per relationship property id

preLoaded

static PropertyReader preLoaded()

storeBacked

static PropertyReader storeBacked(org.neo4j.kernel.api.KernelTransaction kernelTransaction)

buffered

static PropertyReader.Buffered buffered(int batchSize,
                                        int propertyCount)