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   1 /**
   2  * Copyright (c) 2010-2022 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.neohub.internal;
  14
  15 import static org.openhab.binding.neohub.internal.NeoHubBindingConstants.*;
  16
  17 import java.util.Arrays;
  18 import java.util.Collections;
  19 import java.util.HashMap;
  20 import java.util.HashSet;
  21 import java.util.Hashtable;
  22 import java.util.Map;
  23 import java.util.Set;
  24
  25 import org.eclipse.jdt.annotation.NonNullByDefault;
  26 import org.eclipse.jdt.annotation.Nullable;
  27 import org.openhab.core.config.discovery.DiscoveryService;
  28 import org.openhab.core.thing.Bridge;
  29 import org.openhab.core.thing.Thing;
  30 import org.openhab.core.thing.ThingTypeUID;
  31 import org.openhab.core.thing.ThingUID;
  32 import org.openhab.core.thing.binding.BaseThingHandlerFactory;
  33 import org.openhab.core.thing.binding.ThingHandler;
  34 import org.openhab.core.thing.binding.ThingHandlerFactory;
  35 import org.osgi.framework.ServiceRegistration;
  36 import org.osgi.service.component.annotations.Component;
  37
  38 /**
  39  * The {@link NeoHubHandlerFactory} creates things and thing handlers
  40  *
  41  * @author Andrew Fiddian-Green - Initial contribution
  42  */
  43 @NonNullByDefault
  44 @Component(configurationPid = "binding.neohub", service = ThingHandlerFactory.class)
  45 public class NeoHubHandlerFactory extends BaseThingHandlerFactory {
  46
  47     private static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Collections
  48             .unmodifiableSet(new HashSet<>(Arrays.asList(THING_TYPE_NEOHUB, THING_TYPE_NEOSTAT, THING_TYPE_NEOPLUG,
  49                     THING_TYPE_NEOCONTACT, THING_TYPE_NEOTEMPERATURESENSOR)));
  50
  51     private final Map<ThingUID, ServiceRegistration<?>> discoServices = new HashMap<>();
  52
  53     @Override
  54     public boolean supportsThingType(ThingTypeUID thingTypeUID) {
  55         return SUPPORTED_THING_TYPES_UIDS.contains(thingTypeUID);
  56     }
  57
  58     @Override
  59     protected @Nullable ThingHandler createHandler(Thing thing) {
  60         ThingTypeUID thingTypeUID = thing.getThingTypeUID();
  61
  62         if ((thingTypeUID.equals(THING_TYPE_NEOHUB)) && (thing instanceof Bridge)) {
  63             NeoHubHandler handler = new NeoHubHandler((Bridge) thing);
  64             createDiscoveryService(handler);
  65             return handler;
  66         }
  67
  68         if (thingTypeUID.equals(THING_TYPE_NEOSTAT)) {
  69             return new NeoStatHandler(thing);
  70         }
  71
  72         if (thingTypeUID.equals(THING_TYPE_NEOPLUG)) {
  73             return new NeoPlugHandler(thing);
  74         }
  75
  76         if (thingTypeUID.equals(THING_TYPE_NEOCONTACT)) {
  77             return new NeoContactHandler(thing);
  78         }
  79
  80         if (thingTypeUID.equals(THING_TYPE_NEOTEMPERATURESENSOR)) {
  81             return new NeoTemperatureSensorHandler(thing);
  82         }
  83
  84         return null;
  85     }
  86
  87     @Override
  88     protected synchronized void removeHandler(ThingHandler handler) {
  89         if (handler instanceof NeoHubHandler) {
  90             destroyDiscoveryService((NeoHubHandler) handler);
  91         }
  92     }
  93
  94     /*
  95      * create a discovery service so that a newly created hub will find the
  96      * respective things tht are inside it
  97      */
  98     private synchronized void createDiscoveryService(NeoHubHandler handler) {
  99         // create a new discovery service
 100         NeoHubDiscoveryService ds = new NeoHubDiscoveryService(handler);
 101
 102         // activate the discovery service
 103         ds.activate();
 104
 105         // register the discovery service
 106         ServiceRegistration<?> serviceReg = bundleContext.registerService(DiscoveryService.class.getName(), ds,
 107                 new Hashtable<>());
 108
 109         /*
 110          * store service registration in a list so we can destroy it when the respective
 111          * hub is destroyed
 112          */
 113         discoServices.put(handler.getThing().getUID(), serviceReg);
 114     }
 115
 116     /*
 117      * destroy the discovery service
 118      */
 119     private synchronized void destroyDiscoveryService(NeoHubHandler handler) {
 120         // fetch the respective thing's service registration from our list
 121         ServiceRegistration<?> serviceReg = discoServices.remove(handler.getThing().getUID());
 122
 123         if (serviceReg != null) {
 124             // retrieve the respective discovery service
 125             NeoHubDiscoveryService disco = (NeoHubDiscoveryService) bundleContext.getService(serviceReg.getReference());
 126
 127             // and unregister the service
 128             serviceReg.unregister();
 129
 130             // deactivate the service
 131             if (disco != null) {
 132                 disco.deactivate();
 133             }
 134         }
 135     }
 136 }