Package org.eclipse.rdf4j.model.util

Class ModelBuilder

java.lang.Object

org.eclipse.rdf4j.model.util.ModelBuilder

public class ModelBuilder
extends Object

Builder to facilitate easier creation of new RDF Model objects via a fluent interface. All methods returning a ModelBuilder return an immutable reference to the current object, allowing method chaining.

Usage example:

 
    ModelBuilder builder = new ModelBuilder();

    // set some namespaces
    builder.setNamespace("ex", "http://example.org/").setNamespace(FOAF.NS);

    // add a new named graph to the model
    builder.namedGraph("ex:graph1")
               // add statements about resource ex:john
              .subject("ex:john")
                  .add(FOAF.NAME, "John") // add the triple (ex:john, foaf:name "John") to the named graph
                  .add(FOAF.AGE, 42)
                  .add(FOAF.MBOX, "john@example.org");

     // add a triple to the default graph
    builder.defaultGraph().subject("ex:graph1").add(RDF.TYPE, "ex:Graph");

    // return the Model object
    Model m = builder.build();
 
 

Author:

Jeen Broekstra

Constructor Summary

Constructors

Constructor	Description
ModelBuilder()	Create a new ModelBuilder.
ModelBuilder(Model model)	Create a new ModelBuilder which will append to the supplied Model.

Method Summary

Modifier and Type	Method	Description
ModelBuilder	add(String predicate, Object object)	Add an RDF statement with the predicate and object to the model, using the current subject and graph (either named or default).
ModelBuilder	add(String subject, String predicate, Object object)	Add an RDF statement with the given subject, predicate and object to the model, using the current graph (either named or default).
ModelBuilder	add(String subject, IRI predicate, Object object)	Add an RDF statement with the given subject, predicate and object to the model, using the current graph (either named or default).
ModelBuilder	add(IRI predicate, Object object)	Add an RDF statement with the predicate and object to the model, using the current subject and graph (either named or default).
ModelBuilder	add(Resource subject, IRI predicate, Object object)	Add an RDF statement with the given subject, predicate and object to the model, using the current graph (either named or default).
Model	build()	Return the created Model
ModelBuilder	defaultGraph()	Set the current graph in which to add new statements to the default graph.
ModelBuilder	namedGraph(String prefixedNameOrIRI)	Set the current graph in which to add new statements to the supplied named graph.
ModelBuilder	namedGraph(Resource namedGraph)	Set the current graph in which to add new statements to the supplied named graph.
ModelBuilder	setNamespace(String prefix, String namespace)	Set the namespace mapping defined by the supplied prefix and name
ModelBuilder	setNamespace(Namespace ns)	Set the supplied Namespace mapping.
ModelBuilder	subject(String prefixedNameOrIri)	Set the subject about which statements are to be added to the model, defined by a prefixed name or an IRI reference.
ModelBuilder	subject(Resource subject)	Set the subject resource about which statements are to be added to the model.

Methods inherited from class java.lang.Object

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

Constructor Details

ModelBuilder

public ModelBuilder()

Create a new ModelBuilder.

ModelBuilder

public ModelBuilder(Model model)

Create a new ModelBuilder which will append to the supplied Model.

Parameters:

model -

Method Details

setNamespace

public ModelBuilder setNamespace(Namespace ns)

Set the supplied Namespace mapping.

Parameters:

ns - a Namespace to add to the model

Returns:

the ModelBuilder

setNamespace

public ModelBuilder setNamespace(String prefix,
 String namespace)

Set the namespace mapping defined by the supplied prefix and name

Parameters:

prefix - prefix of the namespace to add to the model.

namespace - namespace name to add to the model.

Returns:

the ModelBuilder

subject

public ModelBuilder subject(Resource subject)

Set the subject resource about which statements are to be added to the model.

Parameters:

subject - the subject resource about which statements are to be added.

Returns:

the ModelBuilder

subject

public ModelBuilder subject(String prefixedNameOrIri)

Set the subject about which statements are to be added to the model, defined by a prefixed name or an IRI reference.

Parameters:

prefixedNameOrIri - the subject resource about which statements are to be added. This can be defined either as a prefixed name string (e.g. "ex:john"), or as a full IRI (e.g. "http://example.org/john"). If supplied as a prefixed name, the ModelBuilder will need to have a namespace mapping for the prefix.

Returns:

the ModelBuilder

namedGraph

public ModelBuilder namedGraph(Resource namedGraph)

Set the current graph in which to add new statements to the supplied named graph. This method resets the current subject.

Parameters:

namedGraph - a named graph identifier

Returns:

this ModelBuilder

namedGraph

public ModelBuilder namedGraph(String prefixedNameOrIRI)

Set the current graph in which to add new statements to the supplied named graph. This method clears the current subject.

Parameters:

prefixedNameOrIRI - a named graph identifier. This can be defined either as a prefixed name string (e.g. "ex:john"), or as a full IRI (e.g. "http://example.org/john"). If supplied as a prefixed name, the ModelBuilder will need to have a namespace mapping for the prefix.

Returns:

this ModelBuilder

defaultGraph

public ModelBuilder defaultGraph()

Set the current graph in which to add new statements to the default graph. This method clears the current subject.

Returns:

this ModelBuilder

add

public ModelBuilder add(Resource subject,
 IRI predicate,
 Object object)

Add an RDF statement with the given subject, predicate and object to the model, using the current graph (either named or default).

Parameters:

subject - the statement's subject

predicate - the statement's predicate

object - the statement's object. If the supplied object is a BNode, IRI, or Literal, the object is used directly. If it is a prefixed name String with a known prefix, it is mapped to an IRI. Otherwise a typed Literal is created out of the supplied object, mapping the runtime type of the object to the appropriate XML Schema type. If no mapping is available, the method creates a literal with the string representation of the supplied object as the value, and XSD.STRING as the datatype. Recognized types are Boolean , Byte, Double, Float, Integer, Long, Short, XMLGregorianCalendar , and Date.

Returns:

this ModelBuilder

See Also:

• namedGraph(Resource)
• defaultGraph()
• Literals.createLiteral(ValueFactory, Object)

add

public ModelBuilder add(String subject,
 IRI predicate,
 Object object)

Add an RDF statement with the given subject, predicate and object to the model, using the current graph (either named or default).

Parameters:

subject - the statement's subject. This can be defined either as a prefixed name string (e.g. "ex:john"), or as a full IRI (e.g. "http://example.org/john"). If supplied as a prefixed name, the ModelBuilder will need to have a namespace mapping for the prefix.

predicate - the statement's predicate

object - the statement's object. If the supplied object is a BNode, IRI, or Literal, the object is used directly. If it is a prefixed name String with a known prefix, it is mapped to an IRI. Otherwise a typed Literal is created out of the supplied object, mapping the runtime type of the object to the appropriate XML Schema type. If no mapping is available, the method creates a literal with the string representation of the supplied object as the value, and XSD.STRING as the datatype. Recognized types are Boolean , Byte, Double, Float, Integer, Long, Short, XMLGregorianCalendar , and Date.

Returns:

this ModelBuilder

See Also:

• namedGraph(Resource)
• defaultGraph()
• Literals.createLiteral(ValueFactory, Object)

add

public ModelBuilder add(String subject,
 String predicate,
 Object object)

Add an RDF statement with the given subject, predicate and object to the model, using the current graph (either named or default).

Parameters:

subject - the statement's subject. This can be defined either as a prefixed name string (e.g. "ex:john"), or as a full IRI (e.g. "http://example.org/john"). If supplied as a prefixed name, the ModelBuilder will need to have a namespace mapping for the prefix.

predicate - the statement's predicate. This can be defined either as a prefixed name string (e.g. "ex:john"), or as a full IRI (e.g. "http://example.org/john"). If supplied as a prefixed name, the ModelBuilder will need to have a namespace mapping for the prefix.

object - the statement's object. If the supplied object is a BNode, IRI, or Literal, the object is used directly. If it is a prefixed name String with a known prefix, it is mapped to an IRI. Otherwise a typed Literal is created out of the supplied object, mapping the runtime type of the object to the appropriate XML Schema type. If no mapping is available, the method creates a literal with the string representation of the supplied object as the value, and XSD.STRING as the datatype. Recognized types are Boolean , Byte, Double, Float, Integer, Long, Short, XMLGregorianCalendar , and Date.

Returns:

this ModelBuilder

See Also:

• namedGraph(Resource)
• defaultGraph()
• Literals.createLiteral(ValueFactory, Object)

add

public ModelBuilder add(IRI predicate,
 Object object)

Add an RDF statement with the predicate and object to the model, using the current subject and graph (either named or default).

Parameters:

predicate - the statement's predicate.

object - the statement's object. If the supplied object is a BNode, IRI, or Literal, the object is used directly. If it is a prefixed name String with a known prefix, it is mapped to an IRI. Otherwise a typed Literal is created out of the supplied object, mapping the runtime type of the object to the appropriate XML Schema type. If no mapping is available, the method creates a literal with the string representation of the supplied object as the value, and XSD.STRING as the datatype. Recognized types are Boolean , Byte, Double, Float, Integer, Long, Short, XMLGregorianCalendar , and Date.

Returns:

this ModelBuilder

Throws:

ModelException - if the current subject is not set using subject(Resource) or subject(String).

add

public ModelBuilder add(String predicate,
 Object object)

Add an RDF statement with the predicate and object to the model, using the current subject and graph (either named or default).

Parameters:

predicate - the statement's predicate. This can be defined either as a prefixed name string (e.g. "ex:john"), or as a full IRI (e.g. "http://example.org/john"). If supplied as a prefixed name, the ModelBuilder will need to have a namespace mapping for the prefix.

object - the statement's object. If the supplied object is a BNode, IRI, or Literal, the object is used directly. If it is a prefixed name String with a known prefix, it is mapped to an IRI. Otherwise a typed Literal is created out of the supplied object, mapping the runtime type of the object to the appropriate XML Schema type. If no mapping is available, the method creates a literal with the string representation of the supplied object as the value, and XSD.STRING as the datatype. Recognized types are Boolean , Byte, Double, Float, Integer, Long, Short, XMLGregorianCalendar , and Date.

Returns:

this ModelBuilder

Throws:

ModelException - if the current subject is not set using subject(Resource) or subject(String).

build

public Model build()

Return the created Model

Returns:

the Model