org.fcrepo.kernel.impl.rdf

Class JcrRdfTools

java.lang.Object

org.fcrepo.kernel.impl.rdf.JcrRdfTools

public class JcrRdfTools
extends Object

A set of helpful tools for converting JCR properties to RDF

Since:

May 10, 2013

Author:

Chris Beer, ajs6f

Field Summary

Fields

Modifier and Type	Field and Description
static com.google.common.collect.BiMap<String,String>	jcrNamespacesToRDFNamespaces A map of JCR namespaces to Fedora's RDF namespaces
protected org.modeshape.jcr.api.JcrTools	jcrTools
static com.google.common.collect.BiMap<String,String>	rdfNamespacesToJcrNamespaces A map of Fedora's RDF namespaces to the JCR equivalent

Constructor Summary

Constructors

Constructor and Description
JcrRdfTools(IdentifierConverter<com.hp.hpl.jena.rdf.model.Resource,FedoraResource> idTranslator, javax.jcr.Session session) Constructor with even more context.

Method Summary

Methods

Modifier and Type	Method and Description
void	addMixin(FedoraResource resource, com.hp.hpl.jena.rdf.model.Resource mixinResource, Map<String,String> namespaces) Add a mixin to a node
void	addProperty(FedoraResource resource, com.hp.hpl.jena.rdf.model.Property predicate, com.hp.hpl.jena.rdf.model.RDFNode value, Map<String,String> namespaces) Add property to a node
javax.jcr.Value	createValue(javax.jcr.Node node, com.hp.hpl.jena.rdf.model.RDFNode data, String propertyName) Create a JCR value from an RDFNode for a given JCR property
javax.jcr.Value	createValue(javax.jcr.ValueFactory valueFactory, com.hp.hpl.jena.rdf.model.RDFNode data, int type) Create a JCR value from an RDF node with the given JCR type
static String	getJcrNamespaceForRDFNamespace(String rdfNamespaceUri) Convert a Fedora RDF Namespace into its JCR equivalent
static String	getRDFNamespaceForJcrNamespace(String jcrNamespaceUri) Convert a JCR namespace into an RDF namespace fit for downstream consumption.
void	removeMixin(FedoraResource resource, com.hp.hpl.jena.rdf.model.Resource mixinResource, Map<String,String> nsPrefixMap) Remove a mixin from a node
void	removeProperty(FedoraResource resource, com.hp.hpl.jena.rdf.model.Property predicate, com.hp.hpl.jena.rdf.model.RDFNode objectNode, Map<String,String> nsPrefixMap) Remove a property from a node
protected boolean	repositoryHasType(javax.jcr.Session session, String mixinName)
com.hp.hpl.jena.rdf.model.Statement	skolemize(IdentifierConverter<com.hp.hpl.jena.rdf.model.Resource,FedoraResource> idTranslator, com.hp.hpl.jena.rdf.model.Statement t) Convert an external statement into a persistable statement by skolemizing blank nodes, creating hash-uri subjects, etc

Methods inherited from class java.lang.Object

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

Field Detail

jcrNamespacesToRDFNamespaces

public static com.google.common.collect.BiMap<String,String> jcrNamespacesToRDFNamespaces

A map of JCR namespaces to Fedora's RDF namespaces

rdfNamespacesToJcrNamespaces

public static com.google.common.collect.BiMap<String,String> rdfNamespacesToJcrNamespaces

A map of Fedora's RDF namespaces to the JCR equivalent

jcrTools

protected org.modeshape.jcr.api.JcrTools jcrTools

Constructor Detail

JcrRdfTools

public JcrRdfTools(IdentifierConverter<com.hp.hpl.jena.rdf.model.Resource,FedoraResource> idTranslator,
           javax.jcr.Session session)

Constructor with even more context.

Parameters:

idTranslator - the id translator

session - the session

Method Detail

getJcrNamespaceForRDFNamespace

public static String getJcrNamespaceForRDFNamespace(String rdfNamespaceUri)

Convert a Fedora RDF Namespace into its JCR equivalent

Parameters:

rdfNamespaceUri - a namespace from an RDF document

Returns:

the JCR namespace, or the RDF namespace if no matching JCR namespace is found

getRDFNamespaceForJcrNamespace

public static String getRDFNamespaceForJcrNamespace(String jcrNamespaceUri)

Convert a JCR namespace into an RDF namespace fit for downstream consumption.

Parameters:

jcrNamespaceUri - a namespace from the JCR NamespaceRegistry

Returns:

an RDF namespace for downstream consumption.

createValue

public javax.jcr.Value createValue(javax.jcr.Node node,
                          com.hp.hpl.jena.rdf.model.RDFNode data,
                          String propertyName)
                            throws javax.jcr.RepositoryException

Create a JCR value from an RDFNode for a given JCR property

Parameters:

node - the JCR node we want a property for

data - an RDF Node (possibly with a DataType)

propertyName - name of the property to populate (used to use the right type for the value)

Returns:

the JCR value from an RDFNode for a given JCR property

Throws:

javax.jcr.RepositoryException - if repository exception occurred

createValue

public javax.jcr.Value createValue(javax.jcr.ValueFactory valueFactory,
                          com.hp.hpl.jena.rdf.model.RDFNode data,
                          int type)
                            throws javax.jcr.RepositoryException

Create a JCR value from an RDF node with the given JCR type

Parameters:

valueFactory - the given value factory

data - the rdf node data

type - the given JCR type

Returns:

created value

Throws:

javax.jcr.RepositoryException - if repository exception occurred

addMixin

public void addMixin(FedoraResource resource,
            com.hp.hpl.jena.rdf.model.Resource mixinResource,
            Map<String,String> namespaces)
              throws javax.jcr.RepositoryException

Add a mixin to a node

Parameters:

resource - the fedora resource

mixinResource - the mixin resource

namespaces - the namespace

Throws:

javax.jcr.RepositoryException - if repository exception occurred

addProperty

public void addProperty(FedoraResource resource,
               com.hp.hpl.jena.rdf.model.Property predicate,
               com.hp.hpl.jena.rdf.model.RDFNode value,
               Map<String,String> namespaces)
                 throws javax.jcr.RepositoryException

Add property to a node

Parameters:

resource - the fedora resource

predicate - the predicate

value - the value

namespaces - the namespace

Throws:

javax.jcr.RepositoryException - if repository exception occurred

repositoryHasType

protected boolean repositoryHasType(javax.jcr.Session session,
                        String mixinName)
                             throws javax.jcr.RepositoryException

Throws:

javax.jcr.RepositoryException

removeMixin

public void removeMixin(FedoraResource resource,
               com.hp.hpl.jena.rdf.model.Resource mixinResource,
               Map<String,String> nsPrefixMap)
                 throws javax.jcr.RepositoryException

Remove a mixin from a node

Parameters:

resource - the resource

mixinResource - the mixin resource

nsPrefixMap - the prefix map

Throws:

javax.jcr.RepositoryException - if repository exception occurred

removeProperty

public void removeProperty(FedoraResource resource,
                  com.hp.hpl.jena.rdf.model.Property predicate,
                  com.hp.hpl.jena.rdf.model.RDFNode objectNode,
                  Map<String,String> nsPrefixMap)
                    throws javax.jcr.RepositoryException

Remove a property from a node

Parameters:

resource - the fedora resource

predicate - the predicate

objectNode - the object node

nsPrefixMap - the prefix map

Throws:

javax.jcr.RepositoryException - if repository exception occurred

skolemize

public com.hp.hpl.jena.rdf.model.Statement skolemize(IdentifierConverter<com.hp.hpl.jena.rdf.model.Resource,FedoraResource> idTranslator,
                                            com.hp.hpl.jena.rdf.model.Statement t)
                                              throws javax.jcr.RepositoryException

Convert an external statement into a persistable statement by skolemizing blank nodes, creating hash-uri subjects, etc

Parameters:

idTranslator - the property of idTranslator

t - the statement

Returns:

the persistable statement

Throws:

javax.jcr.RepositoryException - if repository exception occurred