org.springframework.data.neo4j.support.typerepresentation

Class LabelBasedNodeTypeRepresentationStrategy

java.lang.Object

org.springframework.data.neo4j.support.typerepresentation.LabelBasedNodeTypeRepresentationStrategy

All Implemented Interfaces:

NodeTypeRepresentationStrategy, TypeRepresentationStrategy<org.neo4j.graphdb.Node>

public class LabelBasedNodeTypeRepresentationStrategy
extends Object
implements NodeTypeRepresentationStrategy

Provides a Node Type Representation Strategy which makes use of Labels, and specifically uses Cypher as the mechanism for interacting with the graph database.

Since:

24-09-2013

Author:

Nicki Watt

Field Summary

Fields

Modifier and Type	Field and Description
protected Class<org.neo4j.graphdb.Node>	clazz
protected LabelBasedStrategyCypherHelper	cypherHelper
protected GraphDatabase	graphDb
static String	LABELSTRATEGY_PREFIX
protected CypherQueryEngine	queryEngine
static String	SDN_LABEL_STRATEGY

Constructor Summary

Constructors

Constructor and Description
LabelBasedNodeTypeRepresentationStrategy(GraphDatabase graphDb)

Method Summary

Modifier and Type	Method and Description
long	count(StoredEntityType type)
<U> org.neo4j.helpers.collection.ClosableIterable<org.neo4j.graphdb.Node>	findAll(StoredEntityType type)
boolean	isLabelBased()
static boolean	isStrategyAlreadyInUse(GraphDatabase graphDatabaseService)
void	preEntityRemoval(org.neo4j.graphdb.Node state) Callback for cleaning up type information before removal.
Object	readAliasFrom(org.neo4j.graphdb.Node state)
void	writeTypeTo(org.neo4j.graphdb.Node state, StoredEntityType type) Callback for setting up and/or storing type information after creation.

Methods inherited from class java.lang.Object

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

Field Detail

SDN_LABEL_STRATEGY

public static final String SDN_LABEL_STRATEGY

See Also:

Constant Field Values

LABELSTRATEGY_PREFIX

public static final String LABELSTRATEGY_PREFIX

See Also:

Constant Field Values

graphDb

protected GraphDatabase graphDb

clazz

protected final Class<org.neo4j.graphdb.Node> clazz

cypherHelper

protected final LabelBasedStrategyCypherHelper cypherHelper

queryEngine

protected CypherQueryEngine queryEngine

Constructor Detail

LabelBasedNodeTypeRepresentationStrategy

public LabelBasedNodeTypeRepresentationStrategy(GraphDatabase graphDb)

Method Detail

writeTypeTo

public void writeTypeTo(org.neo4j.graphdb.Node state,
                        StoredEntityType type)

Description copied from interface: TypeRepresentationStrategy

Callback for setting up and/or storing type information after creation.

Specified by:

writeTypeTo in interface TypeRepresentationStrategy<org.neo4j.graphdb.Node>

Parameters:

state - Backing state of entity being created

type - Type of entity being created

findAll

public <U> org.neo4j.helpers.collection.ClosableIterable<org.neo4j.graphdb.Node> findAll(StoredEntityType type)

Specified by:

findAll in interface TypeRepresentationStrategy<org.neo4j.graphdb.Node>

Returns:

lazy Iterable over all instances of the given type

count

public long count(StoredEntityType type)

Specified by:

count in interface TypeRepresentationStrategy<org.neo4j.graphdb.Node>

Returns:

number of instances of this class contained in the graph

readAliasFrom

public Object readAliasFrom(org.neo4j.graphdb.Node state)

Specified by:

readAliasFrom in interface TypeRepresentationStrategy<org.neo4j.graphdb.Node>

Returns:

java type that of the node entity of this node

preEntityRemoval

public void preEntityRemoval(org.neo4j.graphdb.Node state)

Description copied from interface: TypeRepresentationStrategy

Callback for cleaning up type information before removal. If state does not have any state associated, doesn't do anything.

Specified by:

preEntityRemoval in interface TypeRepresentationStrategy<org.neo4j.graphdb.Node>

Parameters:

state - Backing state of entity being removed

isLabelBased

public boolean isLabelBased()

Specified by:

isLabelBased in interface TypeRepresentationStrategy<org.neo4j.graphdb.Node>

isStrategyAlreadyInUse

public static boolean isStrategyAlreadyInUse(GraphDatabase graphDatabaseService)