GalleryExporter.java

package no.dusken.aranea.export;

import no.dusken.aranea.export.model.ExportGallery;
import no.dusken.aranea.plugin.galleryplugin.model.Gallery;
import no.dusken.common.dao.GenericDao;
import org.codehaus.jackson.JsonEncoding;
import org.codehaus.jackson.JsonGenerator;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.persistence.TypedQuery;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import java.io.IOException;
import java.io.OutputStream;

@Component
public class GalleryExporter extends AbstractExporter{

    @Autowired
    private GenericDao genericDao;

    @Override
    public void exportToJson(OutputStream outputStream) throws IOException {
        CriteriaBuilder cb = genericDao.getCriteriaBuilder();
        CriteriaQuery<Gallery> query = cb.createQuery(Gallery.class);
        //Root<Gallery> from = query.from(Gallery.class);
        //CriteriaQuery<Gallery> select = query.select(from);

        TypedQuery<Gallery> typedQuery = genericDao.getTypedQuery(query);
        JsonGenerator jg = jsonFactory.createJsonGenerator(outputStream, JsonEncoding.UTF8);
        jg.writeStartArray();
        for(Gallery gallery : typedQuery.getResultList()){
            jg.writeObject(new ExportGallery(gallery));
        }
        jg.writeEndArray();
    }

    @Override
    public String getName() {
        return "gallery";
    }
}