| 1 | package dk.deepthought.sidious.services; |
| 2 | |
| 3 | import java.util.ArrayList; |
| 4 | import java.util.Collection; |
| 5 | |
| 6 | import org.apache.commons.logging.Log; |
| 7 | import org.apache.commons.logging.LogFactory; |
| 8 | |
| 9 | import dk.deepthought.sidious.greenhouse.ClimaticState; |
| 10 | import dk.deepthought.sidious.greenhouse.SensorInput; |
| 11 | import dk.deepthought.sidious.supportsystem.State; |
| 12 | import dk.deepthought.sidious.supportsystem.SuperLinkID; |
| 13 | |
| 14 | /** |
| 15 | * This class handles interaction with environment. It implements convenience |
| 16 | * methods for handling of sensors. |
| 17 | * |
| 18 | * @author Deepthought |
| 19 | * |
| 20 | */ |
| 21 | public class ServiceEngine { |
| 22 | |
| 23 | /** |
| 24 | * All the sensors in the environment. |
| 25 | */ |
| 26 | private static Collection<SensorInput> sensorList = new ArrayList<SensorInput>(); |
| 27 | |
| 28 | /** |
| 29 | * Logger for this class |
| 30 | */ |
| 31 | private static final Log logger = LogFactory.getLog(ServiceEngine.class); |
| 32 | |
| 33 | |
| 34 | /** |
| 35 | * Returns a snapshot of the sensors and their current setting in the |
| 36 | * system. |
| 37 | * |
| 38 | * @return the sensors of the system |
| 39 | */ |
| 40 | private synchronized static Collection<SensorInput> getEnvironmentSensors() { |
| 41 | return sensorList; |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * Method returns the current state of the system. |
| 46 | * |
| 47 | * @return the current state |
| 48 | */ |
| 49 | public static State getCurrentState() { |
| 50 | return new ClimaticState(getEnvironmentSensors()); |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Method returns the value of the sensor associated with the given |
| 55 | * <code>id</code>. |
| 56 | * |
| 57 | * @param id |
| 58 | * the id of the sensor |
| 59 | * @return the value of the sensor |
| 60 | */ |
| 61 | public static double getSensorValue(SuperLinkID id) { |
| 62 | if (id == null) { |
| 63 | throw new IllegalArgumentException("null not valid id"); |
| 64 | } |
| 65 | if (logger.isDebugEnabled()) { |
| 66 | logger.debug("getSensorValue(SuperLinkID id=" + id + ") - start"); |
| 67 | } |
| 68 | Collection<SensorInput> sensors = getEnvironmentSensors(); |
| 69 | for (SensorInput input : sensors) { |
| 70 | if (input.getID().equals(id)) { |
| 71 | double returndouble = input.getValue(); |
| 72 | if (logger.isDebugEnabled()) { |
| 73 | logger.debug("getSensorValue(SuperLinkID id=" + id |
| 74 | + ") - end - return value=" + returndouble); |
| 75 | } |
| 76 | return returndouble; |
| 77 | } |
| 78 | } |
| 79 | logger.error("getSensorValue(SuperLinkID id=" + id |
| 80 | + ") - end - return value=" + Double.NaN); |
| 81 | return Double.NaN; |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * @param sensorList |
| 86 | * the sensorList to set |
| 87 | */ |
| 88 | public synchronized static void setSensorList( |
| 89 | Collection<SensorInput> sensorList) { |
| 90 | ServiceEngine.sensorList = sensorList; |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Resets the service engine. |
| 95 | */ |
| 96 | public static void reset() { |
| 97 | sensorList = new ArrayList<SensorInput>(); |
| 98 | } |
| 99 | |
| 100 | } |