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| import java.util.*;
import com.hp.hpl.jena.rdf.model.*;
/**
* A small family tree held in a Jena Model
*/
public class FamilyModel {
// Namespace declarations
static final String familyUri = "http://family/";
static final String relationshipUri = "http://purl.org/vocab/relationship/";
// Jena model representing the family
private Model model;
/**
* Creates a model and populates it with family members and their
* relationships
*/
private FamilyModel() {
// Create an empty Model
model = ModelFactory.createDefaultModel();
// Create the types of Property we need to describe relationships
// in the model
Property childOf = model.createProperty(relationshipUri,"childOf");
Property parentOf = model.createProperty(relationshipUri,"parentOf");
Property siblingOf = model.createProperty(relationshipUri,"siblingOf");
Property spouseOf = model.createProperty(relationshipUri,"spouseOf");
// Create resources representing the people in our model
Resource adam = model.createResource(familyUri+"adam");
Resource beth = model.createResource(familyUri+"beth");
Resource chuck = model.createResource(familyUri+"chuck");
Resource dotty = model.createResource(familyUri+"dotty");
Resource edward = model.createResource(familyUri+"edward");
Resource fran = model.createResource(familyUri+"fran");
Resource greg = model.createResource(familyUri+"greg");
Resource harriet = model.createResource(familyUri+"harriet");
// Add properties to describing the relationships between them
adam.addProperty(siblingOf,beth);
adam.addProperty(spouseOf,dotty);
adam.addProperty(parentOf,edward);
adam.addProperty(parentOf,fran);
beth.addProperty(siblingOf,adam);
beth.addProperty(spouseOf,chuck);
chuck.addProperty(spouseOf,beth);
dotty.addProperty(spouseOf,adam);
dotty.addProperty(parentOf,edward);
dotty.addProperty(parentOf,fran);
// Statements can also be directly created ...
Statement statement1 = model.createStatement(edward,childOf,adam);
Statement statement2 = model.createStatement(edward,childOf,dotty);
Statement statement3 = model.createStatement(edward,siblingOf,fran);
// ... then added to the model:
model.add(statement1);
model.add(statement2);
model.add(statement3);
// Arrays of Statements can also be added to a Model:
Statement statements[] = new Statement[5];
statements[0] = model.createStatement(fran,childOf,adam);
statements[1] = model.createStatement(fran,childOf,dotty);
statements[2] = model.createStatement(fran,siblingOf,edward);
statements[3] = model.createStatement(fran,spouseOf,greg);
statements[4] = model.createStatement(fran,parentOf,harriet);
model.add(statements);
// A List of Statements can also be added
List list = new ArrayList();
list.add(model.createStatement(greg,spouseOf,fran));
list.add(model.createStatement(greg,parentOf,harriet));
list.add(model.createStatement(harriet,childOf,fran));
list.add(model.createStatement(harriet,childOf,greg));
model.add(list);
}
/**
* Creates a FamilyModel and dumps the content of its RDF representation
*/
public static void main(String args[]) {
// Create a model representing the family
FamilyModel theFamily = new FamilyModel();
// Dump out a String representation of the model
System.out.println(theFamily.model);
}
} |
