eu.europeana.corelib.neo4j.server.impl

Class Neo4jServerImpl

java.lang.Object

eu.europeana.corelib.neo4j.server.impl.Neo4jServerImpl

All Implemented Interfaces:

Neo4jServer

public class Neo4jServerImpl
extends Object
implements Neo4jServer

Author:

Yorgos.Mamakis@ europeana.eu

See Also:

Neo4jServer

Constructor Summary

Constructors

Constructor and Description
Neo4jServerImpl()
Neo4jServerImpl(String serverPath, String index, String customPath) Neo4j contructor

Method Summary

Methods

Modifier and Type	Method and Description
List<org.neo4j.graphdb.Node>	getChildren(org.neo4j.graphdb.Node id, int offset, int limit) Retrieve the children nodes of a parent node (parent-child relation dcterms:hasPart).
long	getChildrenCount(org.neo4j.graphdb.Node id) Retrieve the number of children for a specific node
String	getCustomPath() The URI path for the REST cal to initial structure
List<org.neo4j.graphdb.Node>	getFollowingSiblings(org.neo4j.graphdb.Node id, int limit) Retrieve ordered list of children using a specific node as a child following outbound edm:isNextInSequence relations
Hierarchy	getInitialStruct(String id) Get the initial hierachy for a specific Europeana id
org.neo4j.graphdb.Node	getNode(String id) Get node by its id
long	getNodeIndex(org.neo4j.graphdb.Node node) Get the order of the node within its hierarchy (local index)
org.neo4j.graphdb.Node	getParent(org.neo4j.graphdb.Node id) Retrieve the parent node of a node (parent relation dcterms:isPartOf)
List<org.neo4j.graphdb.Node>	getPreceedingSiblings(org.neo4j.graphdb.Node id, int limit) Retrieve ordered list of children using a specific node as a child following inbound edm:isNextInSequence relations
boolean	isHierarchy(String id) Check if the specified id belongs to a hierarchy

Methods inherited from class java.lang.Object

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

Constructor Detail

Neo4jServerImpl

public Neo4jServerImpl(String serverPath,
               String index,
               String customPath)

Neo4j contructor

Parameters:

serverPath - The path of the Neo4j server

index - The name of the index to search on

customPath - The path of the custom Europeana Neo4j plugins

Neo4jServerImpl

public Neo4jServerImpl()

Method Detail

getNode

public org.neo4j.graphdb.Node getNode(String id)

Description copied from interface: Neo4jServer

Get node by its id

Specified by:

getNode in interface Neo4jServer

Parameters:

id - The id to search for

Returns:

A Neo4j node

isHierarchy

public boolean isHierarchy(String id)

Description copied from interface: Neo4jServer

Check if the specified id belongs to a hierarchy

Specified by:

isHierarchy in interface Neo4jServer

Parameters:

id - The Europeana id

Returns:

true if it belongs to a hierarchy

getChildren

public List<org.neo4j.graphdb.Node> getChildren(org.neo4j.graphdb.Node id,
                                       int offset,
                                       int limit)

Description copied from interface: Neo4jServer

Retrieve the children nodes of a parent node (parent-child relation dcterms:hasPart). Returns null if null is present

Specified by:

getChildren in interface Neo4jServer

Parameters:

id - The node for which to retrieve the children

offset - from which child to start receiving from

limit - how many children to receive

Returns:

A list of children nodes with size <= to the specified limit

getParent

public org.neo4j.graphdb.Node getParent(org.neo4j.graphdb.Node id)

Description copied from interface: Neo4jServer

Retrieve the parent node of a node (parent relation dcterms:isPartOf)

Specified by:

getParent in interface Neo4jServer

Parameters:

id - The node for which to retrieve the parent

Returns:

The parent node

getFollowingSiblings

public List<org.neo4j.graphdb.Node> getFollowingSiblings(org.neo4j.graphdb.Node id,
                                                int limit)

Description copied from interface: Neo4jServer

Retrieve ordered list of children using a specific node as a child following outbound edm:isNextInSequence relations

Specified by:

getFollowingSiblings in interface Neo4jServer

Parameters:

id - The node to start from

limit - the number of nodes to retrieve

Returns:

A list of children nodes with size <= to the specified limit

getPreceedingSiblings

public List<org.neo4j.graphdb.Node> getPreceedingSiblings(org.neo4j.graphdb.Node id,
                                                 int limit)

Description copied from interface: Neo4jServer

Retrieve ordered list of children using a specific node as a child following inbound edm:isNextInSequence relations

Specified by:

getPreceedingSiblings in interface Neo4jServer

Parameters:

id - The node to start from

limit - the number of nodes to retrieve

Returns:

A list of children nodes with size <= to the specified limit

getChildrenCount

public long getChildrenCount(org.neo4j.graphdb.Node id)

Description copied from interface: Neo4jServer

Retrieve the number of children for a specific node

Specified by:

getChildrenCount in interface Neo4jServer

Parameters:

id - The node to search on

Returns:

The number of children for the specific node

getNodeIndex

public long getNodeIndex(org.neo4j.graphdb.Node node)

Description copied from interface: Neo4jServer

Get the order of the node within its hierarchy (local index)

Specified by:

getNodeIndex in interface Neo4jServer

Parameters:

node - A specific neo4j node

Returns:

The index number of the node

getInitialStruct

public Hierarchy getInitialStruct(String id)

Description copied from interface: Neo4jServer

Get the initial hierachy for a specific Europeana id

Specified by:

getInitialStruct in interface Neo4jServer

Parameters:

id - The id to search on

Returns:

A full Hierarchy consisting of parents- parents of parents- and nodes

getCustomPath

public String getCustomPath()

Description copied from interface: Neo4jServer

The URI path for the REST cal to initial structure

Specified by:

getCustomPath in interface Neo4jServer

Returns: