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52°North SOS Handler Module
There is a newer version: 5.0.0-alpha.10
/*
 * Copyright (C) 2012-2018 52°North Initiative for Geospatial Open Source
 * Software GmbH
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * If the program is linked with libraries which are licensed under one of
 * the following licenses, the combination of the program with the linked
 * library is not considered a "derivative work" of the program:
 *
 *     - Apache License, version 2.0
 *     - Apache Software License, version 1.0
 *     - GNU Lesser General Public License, version 3
 *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
 *     - Common Development and Distribution License (CDDL), version 1.0
 *
 * Therefore the distribution of the program linked with libraries licensed
 * under the aforementioned licenses, is permitted by the copyright holders
 * if the distribution is compliant with both the GNU General Public
 * License version 2 and the aforementioned licenses.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 */
package org.n52.sos.ds;

import java.util.List;
import java.util.Optional;

import javax.inject.Inject;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.n52.series.db.HibernateSessionStore;
import org.n52.shetland.ogc.om.ObservationStream;
import org.n52.shetland.ogc.om.OmObservation;
import org.n52.shetland.ogc.ows.exception.NoApplicableCodeException;
import org.n52.shetland.ogc.ows.exception.OwsExceptionReport;
import org.n52.shetland.ogc.sos.SosConstants;
import org.n52.shetland.ogc.sos.request.GetObservationByIdRequest;
import org.n52.shetland.ogc.sos.response.GetObservationByIdResponse;
import org.n52.sos.ds.dao.GetObservationByIdDao;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.collect.Lists;

public class GetObservationByIdHandler extends AbstractGetObservationByIdHandler {

    private static final Logger LOGGER = LoggerFactory.getLogger(GetObservationByIdHandler.class);

    private HibernateSessionStore sessionStore;

    private GetObservationByIdDao dao;

    public GetObservationByIdHandler() {
        super(SosConstants.SOS);
    }

    @Inject
    public void setConnectionProvider(HibernateSessionStore sessionStore) {
        this.sessionStore = sessionStore;
    }

    @Inject
    public void setGetObservationByIdDao(Optional getObservationByIdDao) {
        if (getObservationByIdDao.isPresent()) {
            this.dao = getObservationByIdDao.get();
        }
    }

    @Override
    public GetObservationByIdResponse getObservationById(GetObservationByIdRequest request) throws OwsExceptionReport {
        Session session = null;
        try {
            session = sessionStore.getSession();
            GetObservationByIdResponse response = new GetObservationByIdResponse();
            response.setService(request.getService());
            response.setVersion(request.getVersion());
            response.setResponseFormat(request.getResponseFormat());
            response.setResultModel(request.getResultModel());
            List omObservations = Lists.newArrayList();
            if (dao != null) {
                omObservations.addAll(dao.queryObservationsById(request));
            }
            response.setObservationCollection(ObservationStream.of(omObservations));
            return response;
        } catch (HibernateException he) {
            throw new NoApplicableCodeException().causedBy(he).withMessage("Error while querying observation data!");
        } finally {
            sessionStore.returnSession(session);
        }
    }

    @Override
    public boolean isSupported() {
        return true;
    }
}