Class FederationDescriptionReader

java.lang.Object

se.liu.ida.hefquin.federation.catalog.FederationDescriptionReader

public class FederationDescriptionReader
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static FederationDescriptionReader	instance

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	FederationDescriptionReader()

Method Summary

Modifier and Type	Method	Description
protected FederationMember	createBRTPFServer(String uri, VocabularyMapping vm)
protected FederationMember	createFederationMember(org.apache.jena.rdf.model.Resource fedMember, String serviceURI, org.apache.jena.rdf.model.Model fd)
protected FederationMember	createGraphQLServer(String uri)
protected FederationMember	createNeo4jServer(String uri)
protected FederationMember	createSPARQLEndpoint(String uri, VocabularyMapping vm)
protected FederationMember	createTPFServer(String uri, VocabularyMapping vm)
protected FederationMember	createWrappedRESTEndpoint(String uri, List<RESTEndpoint.Parameter> params, List<MappingOperator> trMaps)
protected String	getAsURIString(org.apache.jena.rdf.model.RDFNode n)	Returns a string that represents a URI obtained from the given RDF node.
FederationCatalog	parseFedDescr(String filename)
FederationCatalog	parseFedDescr(org.apache.jena.rdf.model.Model fd)
protected VocabularyMapping	parseVocabMapping(org.apache.jena.rdf.model.Resource fm, org.apache.jena.rdf.model.Model fd)	Attempts to retrieve and parse the vocabulary mapping associated with the given RDF resource fm, representing a FederationMember, in the given federation description fd.
static FederationCatalog	readFromFile(String filename)
static FederationCatalog	readFromModel(org.apache.jena.rdf.model.Model fd)
protected URI	verifyExpectedURI(String uriString)	Verifies that the given string represents an HTTP URI or an HTTPS URI and, if so, returns that URI.

Methods inherited from class java.lang.Object

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

Field Details

instance

public static FederationDescriptionReader instance

Constructor Details

FederationDescriptionReader

protected FederationDescriptionReader()

Method Details

readFromFile

public static FederationCatalog readFromFile(String filename)

readFromModel

public static FederationCatalog readFromModel(org.apache.jena.rdf.model.Model fd)

parseFedDescr

public FederationCatalog parseFedDescr(String filename)

parseFedDescr

public FederationCatalog parseFedDescr(org.apache.jena.rdf.model.Model fd)

createFederationMember

protected FederationMember createFederationMember(org.apache.jena.rdf.model.Resource fedMember,
 String serviceURI,
 org.apache.jena.rdf.model.Model fd)

parseVocabMapping

protected VocabularyMapping parseVocabMapping(org.apache.jena.rdf.model.Resource fm,
 org.apache.jena.rdf.model.Model fd)

Attempts to retrieve and parse the vocabulary mapping associated with the given RDF resource fm, representing a FederationMember, in the given federation description fd. The method attempts to load the vocabulary mapping from the specified path or URL and caches the result for reuse. If no vocabulary mappings file is present, the method returns null.

Parameters:

fm - RDF resource for the federation member

fd - RDF model of the federation description

Returns:

parsed VocabularyMapping, or null if not specified

Throws:

IllegalArgumentException - if the mapping file cannot be loaded or parsed

createSPARQLEndpoint

protected FederationMember createSPARQLEndpoint(String uri,
 VocabularyMapping vm)

createTPFServer

protected FederationMember createTPFServer(String uri,
 VocabularyMapping vm)

createBRTPFServer

protected FederationMember createBRTPFServer(String uri,
 VocabularyMapping vm)

createNeo4jServer

protected FederationMember createNeo4jServer(String uri)

createGraphQLServer

protected FederationMember createGraphQLServer(String uri)

createWrappedRESTEndpoint

protected FederationMember createWrappedRESTEndpoint(String uri,
 List<RESTEndpoint.Parameter> params,
 List<MappingOperator> trMaps)

verifyExpectedURI

protected URI verifyExpectedURI(String uriString)

Verifies that the given string represents an HTTP URI or an HTTPS URI and, if so, returns that URI.

getAsURIString

protected String getAsURIString(org.apache.jena.rdf.model.RDFNode n)

Returns a string that represents a URI obtained from the given RDF node. In particular, if the node is a URI, then that URI is returned (as a string); if the node is an xsd:anyURI literal with a valid URI as its lexical form, then that URI is returned; otherwise, null is returned.