org.visallo.web.routes.ontology.Ontology Maven / Gradle / Ivy

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package org.visallo.web.routes.ontology;

import com.google.inject.Inject;
import com.v5analytics.webster.ParameterizedHandler;
import com.v5analytics.webster.annotations.Handle;
import org.visallo.core.model.ontology.OntologyRepository;
import org.visallo.web.VisalloResponse;
import org.visallo.web.clientapi.model.ClientApiOntology;
import org.visallo.web.clientapi.util.ObjectMapperFactory;

public class Ontology implements ParameterizedHandler {
    private final OntologyRepository ontologyRepository;

    @Inject
    public Ontology(final OntologyRepository ontologyRepository) {
        this.ontologyRepository = ontologyRepository;
    }

    @Handle
    public ClientApiOntology handle(VisalloResponse response) throws Exception {
        ClientApiOntology result = ontologyRepository.getClientApiObject();

        String json = ObjectMapperFactory.getInstance().writeValueAsString(result);
        String eTag = response.generateETag(json.getBytes());
        if (response.testEtagHeaders(eTag)) {
            return result;
        }

        response.addETagHeader(eTag);
        return result;
    }
}