uk.gov.gchq.gaffer.mapstore.impl

Class MapImpl

java.lang.Object

uk.gov.gchq.gaffer.mapstore.impl.MapImpl

public class MapImpl
extends Object

Map data store implementation use by the Gaffer MapStore class.

This class can be thought of as an analogue to a conventional database. Internally, different Map and MultiMap instances are used to keep track of the stored elements and the relationships between those elements. This data store is then abstracted again as a Gaffer Store (by the MapStore class) to give Gaffer-specific functionality.

The internal variables of this class are package-private. This allows operation handlers for the MapStore to be placed in the same package and get access to the maps, without exposing the internal state of the MapStore to classes outside of this package.

Field Summary

Fields

Modifier and Type	Field and Description
static String	AGG_ELEMENTS
static String	EDGE_ID_TO_ELEMENTS
static String	ENTITY_ID_TO_ELEMENTS
static String	NON_AGG_ELEMENTS

Constructor Summary

Constructors

Constructor and Description
MapImpl(Schema schema, MapStoreProperties mapStoreProperties)

Method Summary

Modifier and Type	Method and Description
void	clear()

Methods inherited from class java.lang.Object

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

Field Detail

AGG_ELEMENTS

public static final String AGG_ELEMENTS

See Also:

Constant Field Values

NON_AGG_ELEMENTS

public static final String NON_AGG_ELEMENTS

See Also:

Constant Field Values

ENTITY_ID_TO_ELEMENTS

public static final String ENTITY_ID_TO_ELEMENTS

See Also:

Constant Field Values

EDGE_ID_TO_ELEMENTS

public static final String EDGE_ID_TO_ELEMENTS

See Also:

Constant Field Values

Constructor Detail

MapImpl

public MapImpl(Schema schema,
               MapStoreProperties mapStoreProperties)

Method Detail

clear

public void clear()