Jena Model for Ontology Individuals

package models;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;

import com.hp.hpl.jena.ontology.ConversionException;
import com.hp.hpl.jena.ontology.DatatypeProperty;
import com.hp.hpl.jena.ontology.Individual;
import com.hp.hpl.jena.ontology.OntClass;
import com.hp.hpl.jena.ontology.OntModel;
import com.hp.hpl.jena.rdf.model.Resource;
import com.hp.hpl.jena.vocabulary.XSD;

/**
 * Model Class to interact with OntClass Article
 *
 * @author Benjamin Eckstein
 *
 */
class Model_Article {
    protected Individual individual;

    static Model_Article_Meta model_meta;

    /**
     * Construct a Model_Article from an individual.
     *
     * @param i
     */
    public Model_Article(Individual i) {
        this.individual = i;
        if (Model_Article.model_meta == null) {
            Model_Article.setup(i);
        }
        if (!i.getOntClass().getNameSpace()
                .equals(Model_Article.model_meta.article_NS)) {
            throw new ConversionException("Individual is not an Article but "
                    + i.getOntClass().getNameSpace());
        }
    }

    /**
     * Little helper function to initialize the Article Meta
     *
     * @param i
     */
    public static void setup(Individual i) {
        Model_Article.model_meta = new Model_Article_Meta(i);

    }

    /**
     * Create one (!) Model_Article from the Resultset (MySql query atm) and
     * return it. The Iteration is made at the calling function
     *
     * @param model
     * @param resultSet
     * @return
     * @throws SQLException
     */
    public static Model_Article createFromSql(OntModel model,
            ResultSet resultSet) throws SQLException {

        Resource class_article = model.getResource(Main.NS + "Article");

        String id = "" + resultSet.getString("id");
        String title = "" + resultSet.getString("title");
        String subtitle = "" + resultSet.getString("subtitle");
        String content = "" + resultSet.getString("article_content");
        Timestamp published_date = resultSet.getTimestamp("published_date");

        OntClass article = class_article.as(OntClass.class);
        Individual article_tmp = article.createIndividual(Main.NS + "Article"
                + id);

        if (Model_Article.model_meta == null) {
            Model_Article.setup(article_tmp);
        }

        article_tmp.addProperty(Model_Article.model_meta.article_title, title);
        article_tmp.addProperty(Model_Article.model_meta.article_subtitle,
                subtitle);
        // article_tmp.addProperty(article_content,content);
        article_tmp.addProperty(
                Model_Article.model_meta.article_published_date, published_date
                        + "");
        article_tmp.addProperty(Model_Article.model_meta.article_id, id);
        Model_Article newArticle = new Model_Article(article_tmp);
        newArticle.createMeta(content);
        return newArticle;

    }

    /**
     * Create Additional information about this entity with a given content.
     * Content will not be saved within the Ontology (Space / Performance
     * Reasons).
     *
     * @param content
     * @return
     */
    public Model_Article createMeta(String content) {

        String id = ""
                + individual
                        .getPropertyValue(Model_Article.model_meta.article_id);
        String plain_content = content.replaceAll("\\<.*?\\>", "");
        int words = plain_content.split("\\s").length;
        individual.addProperty(Model_Article.model_meta.article_word_count,
                words + "");
        System.out.println("test " + words);

        return this;

    }

    public int getId() {
        String id = ""
                + individual
                        .getPropertyValue(Model_Article.model_meta.article_id);
        return Integer.parseInt(id);
    }

    public Model_Article setId(int i) {
        individual.setPropertyValue(Model_Article.model_meta.article_id, null);
        individual.addProperty(Model_Article.model_meta.article_id, i + "");
        return this;
    }

    /**
     * Helper class to manage Metainformation about Bento#Article
     *
     * @author Eckstein
     *
     */
    static class Model_Article_Meta {

        OntModel model;
        String article_NS = Main.NS + "Article";
        DatatypeProperty article_title;
        DatatypeProperty article_subtitle;
        DatatypeProperty article_content;
        DatatypeProperty article_published_date;
        DatatypeProperty article_word_count;
        DatatypeProperty article_id;

        public Model_Article_Meta(Individual i) {

            model = i.getOntModel();
            Resource class_article = model.getResource(article_NS);
            article_title = model.createDatatypeProperty(Main.NS + "title");
            article_title.addDomain(class_article);
            article_title.addRange(XSD.xstring);
            article_subtitle = model.createDatatypeProperty(Main.NS
                    + "subtitle");
            article_content = model.createDatatypeProperty(Main.NS + "content");
            article_published_date = model.createDatatypeProperty(Main.NS
                    + "published_date");
            article_word_count = model.createDatatypeProperty(Main.NS
                    + "word_count");
            article_id = model.createDatatypeProperty(Main.NS + "ID");
        }

    }
}