er.neo4jadaptor.storage.neo4j

Class RelationshipStore

java.lang.Object

er.neo4jadaptor.storage.neo4j.RelationshipStore

All Implemented Interfaces:

Store<Ersatz,Neo4JErsatz>

public class RelationshipStore
extends Object
implements Store<Ersatz,Neo4JErsatz>

Stores join entity records on Neo4J relationship. Join entity is an entity that has primary key being two values at the same time being foreign keys pointing to other entities. There should be no other EO relationships except for the main two making the join. Entity attributes are stored as relationship properties.

Author:

Jedrzej Sobanski

Constructor Summary

Constructors

Constructor and Description
RelationshipStore(org.neo4j.graphdb.GraphDatabaseService db, EOEntity entity)

Method Summary

Modifier and Type	Method and Description
void	delete(Neo4JErsatz neoErsatz) Delete record from the store.
Neo4JErsatz	insert(Ersatz row) Creates a new record in the store.
Ersatz	newPrimaryKey() Generate new primary key.
Cursor<Neo4JErsatz>	query(EOQualifier q) Query for records matching EO qualifier.
static boolean	shouldBeStoredAsRelationship(EOEntity entity)
void	update(Ersatz newValues, Neo4JErsatz neoErsatz) Update record with the given values.

Methods inherited from class java.lang.Object

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

Constructor Detail

RelationshipStore

public RelationshipStore(org.neo4j.graphdb.GraphDatabaseService db,
                         EOEntity entity)

Method Detail

shouldBeStoredAsRelationship

public static boolean shouldBeStoredAsRelationship(EOEntity entity)

newPrimaryKey

public Ersatz newPrimaryKey()

Description copied from interface: Store

Generate new primary key.

Specified by:

newPrimaryKey in interface Store<Ersatz,Neo4JErsatz>

Returns:

primary key partial ersatz

insert

public Neo4JErsatz insert(Ersatz row)

Description copied from interface: Store

Creates a new record in the store.

Specified by:

insert in interface Store<Ersatz,Neo4JErsatz>

Parameters:

row - inserted object description

Returns:

saved object corresponding to toInsert

update

public void update(Ersatz newValues,
                   Neo4JErsatz neoErsatz)

Description copied from interface: Store

Update record with the given values.

Specified by:

update in interface Store<Ersatz,Neo4JErsatz>

Parameters:

newValues - new values, can be partial ersatz

neoErsatz - ersatz representing record to be updated

delete

public void delete(Neo4JErsatz neoErsatz)

Description copied from interface: Store

Delete record from the store.

Specified by:

delete in interface Store<Ersatz,Neo4JErsatz>

Parameters:

neoErsatz - ersatz representing record to be deleted

query

public Cursor<Neo4JErsatz> query(EOQualifier q)

Description copied from interface: Store

Query for records matching EO qualifier.

Specified by:

query in interface Store<Ersatz,Neo4JErsatz>

Parameters:

q - qualifier

Returns:

query results