edu.cornell.mannlib.vitro.webapp.utils.jena.JenaOutputUtils.java Source code

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Here is the source code for edu.cornell.mannlib.vitro.webapp.utils.jena.JenaOutputUtils.java

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/* $This file is distributed under the terms of the license in /doc/license.txt$ */

package edu.cornell.mannlib.vitro.webapp.utils.jena;

import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.hp.hpl.jena.rdf.model.Model;

import edu.cornell.mannlib.vitro.webapp.beans.Ontology;
import edu.cornell.mannlib.vitro.webapp.dao.WebappDaoFactory;

public class JenaOutputUtils {

    private static final Log log = LogFactory.getLog(JenaOutputUtils.class.getName());

    public static void setNameSpacePrefixes(Model model, WebappDaoFactory wadf) {

        if (model == null) {
            log.warn("input model is null");
            return;
        }

        Map<String, String> prefixes = new HashMap<String, String>();
        List<Ontology> ontologies = wadf.getOntologyDao().getAllOntologies();
        // apparently this is null if empty
        if (ontologies == null) {
            return;
        }
        Iterator<Ontology> iter = ontologies.iterator();
        String namespace = null;
        String prefix = null;

        prefixes.put("vitro", "http://vitro.mannlib.cornell.edu/ns/vitro/0.7#");
        while (iter.hasNext()) {
            Ontology ontology = iter.next();

            namespace = ontology.getURI(); // this method returns the namespace
            if (namespace == null || namespace.isEmpty()) {
                log.warn("ontology with empty namespace found");
                continue;
            }

            prefix = ontology.getPrefix();
            if (prefix == null || prefix.isEmpty()) {
                log.debug("no prefix found for namespace: " + namespace);
                continue;
            }

            prefixes.put(prefix, namespace);
        }

        model.setNsPrefixes(prefixes);
        return;
    }
}