Java tutorial
/* * Copyright (c) Immotronic, 2012 * * Contributors: * * Lionel Balme (lbalme@immotronic.fr) * Kevin Planchet (kplanchet@immotronic.fr) * * This file is part of ubikit-core, a component of the UBIKIT project. * * This software is a computer program whose purpose is to host third- * parties applications that make use of sensor and actuator networks. * * This software is governed by the CeCILL-C license under French law and * abiding by the rules of distribution of free software. You can use, * modify and/ or redistribute the software under the terms of the CeCILL-C * license as circulated by CEA, CNRS and INRIA at the following URL * As a counterpart to the access to the source code and rights to copy, * "http://www.cecill.info". * * As a counterpart to the access to the source code and rights to copy, * modify and redistribute granted by the license, users are provided only * with a limited warranty and the software's author, the holder of the * economic rights, and the successive licensors have only limited * liability. * * In this respect, the user's attention is drawn to the risks associated * with loading, using, modifying and/or developing or reproducing the * software by the user in light of its specific status of free software, * that may mean that it is complicated to manipulate, and that also * therefore means that it is reserved for developers and experienced * professionals having in-depth computer knowledge. Users are therefore * encouraged to load and test the software's suitability as regards their * requirements in conditions enabling the security of their systems and/or * data to be ensured and, more generally, to use and operate it in the * same conditions as regards security. * * The fact that you are presently reading this means that you have had * knowledge of the CeCILL-C license and that you accept its terms. * * CeCILL-C licence is fully compliant with the GNU Lesser GPL v2 and v3. * */ package fr.immotronic.ubikit.pems.enocean.impl.item.data; import java.util.Date; import org.json.JSONException; import org.json.JSONObject; import org.ubikit.Logger; import org.ubikit.PhysicalEnvironmentItem.JSONValueField; import fr.immotronic.ubikit.pems.enocean.data.EEP060001Data; import fr.immotronic.ubikit.pems.enocean.impl.LC; public final class EEP060001DataImpl implements EEP060001Data { private final ContactState contactState; private final Date date; public static EEP060001DataImpl constructDataFromRecord(JSONObject lastKnownData) { if (lastKnownData == null) return new EEP060001DataImpl(ContactState.UNKNOWN, null); try { ContactState contactState = ContactState.valueOf(lastKnownData.getString("contactState")); Date date = new Date(lastKnownData.getLong("date")); return new EEP060001DataImpl(contactState, date); } catch (JSONException e) { Logger.error(LC.gi(), null, "constructDataFromRecord(): An exception while building a sensorData from a JSONObject SHOULD never happen. Check the code !", e); return new EEP060001DataImpl(ContactState.UNKNOWN, null); } } public EEP060001DataImpl(ContactState contactState, Date date) { this.contactState = contactState; this.date = date; } @Override public ContactState getContactState() { return contactState; } @Override public Date getDate() { return date; } @Override public JSONObject toJSON() { JSONObject res = new JSONObject(); JSONObject o = null; try { if (date == null) { res.put("noDataAvailable", true); return res; } o = new JSONObject(); o.put(JSONValueField.value.name(), contactState.name()); o.put(JSONValueField.uiValue.name(), contactState.name()); o.put(JSONValueField.timestamp.name(), date.getTime()); res.put("contactState", o); } catch (JSONException e) { Logger.error(LC.gi(), this, "toJSON(): An exception while building a JSON view of a EnoceanData SHOULD never happen. Check the code !", e); return null; } return res; } @Override public JSONObject getRecordAsJSON() { if (date == null) return null; try { JSONObject o = new JSONObject(); o.put("contactState", contactState.name()); o.put("date", date.getTime()); return o; } catch (JSONException e) { Logger.error(LC.gi(), this, "getRecordAsJSON(): An exception while building a JSON record of a EnoceanData SHOULD never happen. Check the code !", e); return null; } } }