Java tutorial
/* * @(#) Altitude.java * * This code is part of the CPCC project. * Copyright (c) 2012 Clemens Krainer * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ package at.uni_salzburg.cs.ckgroup.cscpp.engine.actions; import java.util.Locale; import org.json.simple.JSONObject; import at.uni_salzburg.cs.ckgroup.cpcc.mapper.api.ISensorProxy; public class Altitude extends AbstractAction { private Double altitudeOverGround; public Double getAltitudeOverGround() { return altitudeOverGround; } public void setAltitudeOverGround(Double altitudeOverGround) { this.altitudeOverGround = altitudeOverGround; } @Override protected boolean retrieveValue(ISensorProxy sprox) { return null != (altitudeOverGround = sprox.getAltitudeOverGround()); } @Override public String toString() { if (isComplete()) { return String.format(Locale.US, "Altitude (%d, %.1f)", getTimestamp(), altitudeOverGround); } return "Altitude"; } @SuppressWarnings("unchecked") @Override public String toJSONString() { JSONObject o = new JSONObject(); o.put("type", "altitude"); if (getTimestamp() != 0) { o.put("time", getTimestamp()); o.put("value", altitudeOverGround); } return o.toJSONString(); } }