Package uk.gov.gchq.gaffer.store.element

Interface ElementKey

All Known Implementing Classes:

ElementKey.EdgeKey, ElementKey.EntityKey

public interface ElementKey

An ElementKey wraps an element and overrides hashcode and equals to only select the parts of the element that make up the key - i.e the Group, vertex/source/destination/directed and the group by properties.

This can then be used in a Map to group elements together prior to performing aggregation.

An ElementKey should be constructed using one of the create methods.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	ElementKey.EdgeKey
static class	ElementKey.EntityKey

Method Summary

Static Methods

Modifier and Type	Method	Description
static ElementKey	create(Element element, Set<String> groupBy)
static ElementKey	create(Element element, Schema schema)
static ElementKey	create(Element element, SchemaElementDefinition elementDef)

Method Detail

create

static ElementKey create(Element element,
                         Schema schema)

create

static ElementKey create(Element element,
                         SchemaElementDefinition elementDef)

create

static ElementKey create(Element element,
                         Set<String> groupBy)