Package org.odpi.openmetadata.frameworks.integration.dcat.jsonld

Class JsonLdGraph

java.lang.Object

org.odpi.openmetadata.frameworks.integration.dcat.jsonld.JsonLdGraph

public class JsonLdGraph
extends Object

JsonLdGraph holds the nodes read from a JSON-LD document. The nested nodes of the document are flattened so that every node can be found through its identifier, and the descriptions of a node that appear in different parts of the document are merged.

Constructor Summary

Constructors

Constructor	Description
JsonLdGraph()	Default constructor

Method Summary

Modifier and Type	Method	Description
void	addUnresolvedContext(String contextIRI)	Record that the document referred to a context that was not embedded in it.
JsonLdNode	getNode(String id)	Return the node with the requested identifier.
Collection<JsonLdNode>	getNodes()	Return all the nodes in the order that they were first seen in the document.
List<JsonLdNode>	getNodesOfType(String typeIRI)	Return the nodes of the requested type in the order that they were first seen in the document.
JsonLdNode	getOrCreateNode(String id)	Return the node with the requested identifier, creating it if it is not already known.
Set<String>	getUnresolvedContexts()	Return the locations of the contexts that the document referred to but did not embed.
String	newBlankNodeId()	Return a new blank node identifier.

Methods inherited from class java.lang.Object

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

Constructor Details

JsonLdGraph

public JsonLdGraph()

Default constructor

Method Details

getOrCreateNode

public JsonLdNode getOrCreateNode(String id)

Return the node with the requested identifier, creating it if it is not already known.

Parameters:

id - identifier of the node

Returns:

node

getNode

public JsonLdNode getNode(String id)

Return the node with the requested identifier.

Parameters:

id - identifier of the node

Returns:

node or null if it is not known

getNodes

public Collection<JsonLdNode> getNodes()

Return all the nodes in the order that they were first seen in the document.

Returns:

collection of nodes

getNodesOfType

public List<JsonLdNode> getNodesOfType(String typeIRI)

Return the nodes of the requested type in the order that they were first seen in the document.

Parameters:

typeIRI - IRI of the type

Returns:

list of nodes

newBlankNodeId

public String newBlankNodeId()

Return a new blank node identifier.

Returns:

identifier

addUnresolvedContext

public void addUnresolvedContext(String contextIRI)

Record that the document referred to a context that was not embedded in it.

Parameters:

contextIRI - location of the context

getUnresolvedContexts

public Set<String> getUnresolvedContexts()

Return the locations of the contexts that the document referred to but did not embed. These contexts are not retrieved, so terms that only they define are resolved using the standard names of the DCAT vocabulary.

Returns:

set of IRIs