be.ugent.rml.Initializer Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of rmlmapper Show documentation

The RMLMapper executes RML rules to generate high quality Linked Data from multiple originally (semi-)structured data sources.

The newest version!

package be.ugent.rml;

import be.ugent.idlab.knows.functions.agent.Agent;
import be.ugent.idlab.knows.functions.agent.AgentFactory;
import be.ugent.rml.store.Quad;
import be.ugent.rml.store.QuadStore;
import be.ugent.rml.term.NamedNode;
import be.ugent.rml.term.Term;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 *
 */
public class Initializer {

    private final MappingFactory factory;
    private final QuadStore rmlStore;
    private final List triplesMaps;
    private final Map mappings;

    public Initializer(final QuadStore rmlStore, final Agent functionAgent, final String baseIRI, final StrictMode strictMode) throws Exception {
        this.rmlStore = rmlStore;
        //we get all the TriplesMaps from the mapping
        List subjectMapQuads = rmlStore.getQuads(null, new NamedNode(NAMESPACES.RML2 + "subjectMap"), null);
        subjectMapQuads.addAll(rmlStore.getQuads(null, new NamedNode(NAMESPACES.RML2 + "subject"), null));

        this.triplesMaps = subjectMapQuads.stream().map(Quad::getSubject).collect(Collectors.toList());

        this.mappings = new HashMap<>();


        final Agent initialisedFunctionAgent = functionAgent == null ?
                AgentFactory.createFromFnO("fno/functions_idlab.ttl",
                        "fno/functions_idlab_classes_java_mapping.ttl",
                        "fno_idlab_old/functions_idlab.ttl", "fno_idlab_old/functions_idlab_classes_java_mapping.ttl",
                        "functions_grel.ttl",
                        "grel_java_mapping.ttl")
                : functionAgent;

        this.factory = new MappingFactory(initialisedFunctionAgent, baseIRI, strictMode);
        extractMappings();
    }

    private void extractMappings() throws Exception {
        for (Term triplesMap : triplesMaps) {
            this.mappings.put(triplesMap, factory.createMapping(triplesMap, rmlStore));
        }
    }

    public Map getMappings() {
        return this.mappings;
    }
}