edu.stanford.protege.webprotege.project.DefaultOntologyIdManagerImpl Maven / Gradle / Ivy

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package edu.stanford.protege.webprotege.project;

import edu.stanford.protege.webprotege.index.DependentIndex;
import edu.stanford.protege.webprotege.index.Index;
import edu.stanford.protege.webprotege.index.ProjectOntologiesIndex;
import edu.stanford.protege.webprotege.inject.ProjectSingleton;
import org.semanticweb.owlapi.model.IRI;
import org.semanticweb.owlapi.model.OWLOntologyID;

import javax.annotation.Nonnull;
import javax.inject.Inject;
import java.util.Collection;
import java.util.List;
import java.util.UUID;
import java.util.stream.Stream;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * Matthew Horridge
 * Stanford Center for Biomedical Informatics Research
 * 2019-08-15
 */
@ProjectSingleton
public class DefaultOntologyIdManagerImpl implements DefaultOntologyIdManager, DependentIndex {

    @Nonnull
    private final ProjectOntologiesIndex projectOntologiesIndex;

    private OWLOntologyID freshOntologyId;

    @Inject
    public DefaultOntologyIdManagerImpl(ProjectOntologiesIndex projectOntologiesIndex) {
        this.projectOntologiesIndex = checkNotNull(projectOntologiesIndex);
    }

    @Nonnull
    @Override
    public Collection getDependencies() {
        return List.of(projectOntologiesIndex);
    }

    @Nonnull
    @Override
    public synchronized OWLOntologyID getDefaultOntologyId() {
        Stream ontologyIds = projectOntologiesIndex.getOntologyIds();
        return ontologyIds.findFirst()
                .orElseGet(this::createFreshOntologyId);
    }

    private OWLOntologyID createFreshOntologyId() {
        if(freshOntologyId == null) {
            var ontologyIri = "urn:webprotege:ontology:" + UUID.randomUUID();
            freshOntologyId = new OWLOntologyID(IRI.create(ontologyIri));
        }
        return freshOntologyId;
    }
}