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   1 /**
   2  * Copyright (c) 2010-2020 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.velux.internal.factory;
  14
  15 import java.util.HashMap;
  16 import java.util.HashSet;
  17 import java.util.Hashtable;
  18 import java.util.Map;
  19 import java.util.Set;
  20
  21 import org.eclipse.jdt.annotation.NonNullByDefault;
  22 import org.eclipse.jdt.annotation.Nullable;
  23 import org.openhab.core.config.discovery.DiscoveryService;
  24 import org.openhab.core.i18n.LocaleProvider;
  25 import org.openhab.core.i18n.TranslationProvider;
  26 import org.openhab.core.thing.Bridge;
  27 import org.openhab.core.thing.Thing;
  28 import org.openhab.core.thing.ThingTypeUID;
  29 import org.openhab.core.thing.ThingUID;
  30 import org.openhab.core.thing.binding.BaseThingHandlerFactory;
  31 import org.openhab.core.thing.binding.ThingHandler;
  32 import org.openhab.core.thing.binding.ThingHandlerFactory;
  33 import org.openhab.binding.velux.internal.VeluxBindingConstants;
  34 import org.openhab.binding.velux.internal.discovery.VeluxDiscoveryService;
  35 import org.openhab.binding.velux.internal.handler.VeluxBindingHandler;
  36 import org.openhab.binding.velux.internal.handler.VeluxBridgeHandler;
  37 import org.openhab.binding.velux.internal.handler.VeluxHandler;
  38 import org.openhab.binding.velux.internal.utils.Localization;
  39 import org.osgi.framework.ServiceRegistration;
  40 import org.osgi.service.component.annotations.Activate;
  41 import org.osgi.service.component.annotations.Component;
  42 import org.osgi.service.component.annotations.Reference;
  43 import org.slf4j.Logger;
  44 import org.slf4j.LoggerFactory;
  45
  46 /**
  47  * The {@link VeluxHandlerFactory} is responsible for creating things and thing
  48  * handlers.
  49  *
  50  * @author Guenther Schreiner - Initial contribution
  51  */
  52 @NonNullByDefault
  53 @Component(service = ThingHandlerFactory.class, name = "binding.velux")
  54 public class VeluxHandlerFactory extends BaseThingHandlerFactory {
  55     private final Logger logger = LoggerFactory.getLogger(VeluxHandlerFactory.class);
  56
  57     // Class internal
  58
  59     private final Map<ThingUID, ServiceRegistration<?>> discoveryServiceRegistrations = new HashMap<>();
  60
  61     private Set<VeluxBindingHandler> veluxBindingHandlers = new HashSet<>();
  62     private Set<VeluxBridgeHandler> veluxBridgeHandlers = new HashSet<>();
  63     private Set<VeluxHandler> veluxHandlers = new HashSet<>();
  64
  65     private @NonNullByDefault({}) LocaleProvider localeProvider;
  66     private @NonNullByDefault({}) TranslationProvider i18nProvider;
  67     private Localization localization = Localization.UNKNOWN;
  68
  69     // Private
  70
  71     private void registerDeviceDiscoveryService(VeluxBridgeHandler bridgeHandler) {
  72         VeluxDiscoveryService discoveryService = new VeluxDiscoveryService(bridgeHandler, localization);
  73         ServiceRegistration<?> discoveryServiceReg = bundleContext.registerService(DiscoveryService.class.getName(),
  74                 discoveryService, new Hashtable<>());
  75         discoveryServiceRegistrations.put(bridgeHandler.getThing().getUID(), discoveryServiceReg);
  76     }
  77
  78     // Even if the compiler tells, that the value of <remove> cannot be null, it is possible!
  79     // Therefore a @SuppressWarnings("null") is needed to suppress the warning
  80     @SuppressWarnings("null")
  81     private synchronized void unregisterDeviceDiscoveryService(ThingUID thingUID) {
  82         logger.trace("unregisterDeviceDiscoveryService({}) called.", thingUID);
  83         ServiceRegistration<?> remove = discoveryServiceRegistrations.remove(thingUID);
  84         if (remove != null) {
  85             remove.unregister();
  86         }
  87     }
  88
  89     private @Nullable ThingHandler createBindingHandler(Thing thing) {
  90         logger.trace("createBindingHandler({}) called for thing named '{}'.", thing.getUID(), thing.getLabel());
  91         VeluxBindingHandler veluxBindingHandler = new VeluxBindingHandler(thing, localization);
  92         veluxBindingHandlers.add(veluxBindingHandler);
  93         return veluxBindingHandler;
  94     }
  95
  96     private @Nullable ThingHandler createBridgeHandler(Thing thing) {
  97         logger.trace("createBridgeHandler({}) called for thing named '{}'.", thing.getUID(), thing.getLabel());
  98         VeluxBridgeHandler veluxBridgeHandler = new VeluxBridgeHandler((Bridge) thing, localization);
  99         veluxBridgeHandlers.add(veluxBridgeHandler);
 100         registerDeviceDiscoveryService(veluxBridgeHandler);
 101         return veluxBridgeHandler;
 102     }
 103
 104     private @Nullable ThingHandler createThingHandler(Thing thing) {
 105         logger.trace("createThingHandler({}) called for thing named '{}'.", thing.getUID(), thing.getLabel());
 106         VeluxHandler veluxHandler = new VeluxHandler(thing, localization);
 107         veluxHandlers.add(veluxHandler);
 108         return veluxHandler;
 109     }
 110
 111     private void updateBindingState() {
 112         veluxBindingHandlers.forEach((VeluxBindingHandler veluxBindingHandler) -> {
 113             veluxBindingHandler.updateBindingState(veluxBridgeHandlers.size(), veluxHandlers.size());
 114         });
 115     }
 116
 117     private void updateLocalization() {
 118         if (localization == Localization.UNKNOWN && localeProvider != null && i18nProvider != null) {
 119             logger.trace("updateLocalization(): creating Localization based on locale={},translation={}).",
 120                     localeProvider, i18nProvider);
 121             localization = new Localization(localeProvider, i18nProvider);
 122         }
 123     }
 124
 125     // Constructor
 126
 127     @Activate
 128     public VeluxHandlerFactory(final @Reference LocaleProvider givenLocaleProvider,
 129             final @Reference TranslationProvider givenI18nProvider) {
 130         logger.trace("VeluxHandlerFactory(locale={},translation={}) called.", givenLocaleProvider, givenI18nProvider);
 131         localeProvider = givenLocaleProvider;
 132         i18nProvider = givenI18nProvider;
 133     }
 134
 135     @Reference
 136     protected void setLocaleProvider(final LocaleProvider givenLocaleProvider) {
 137         logger.trace("setLocaleProvider(): provided locale={}.", givenLocaleProvider);
 138         localeProvider = givenLocaleProvider;
 139         updateLocalization();
 140     }
 141
 142     @Reference
 143     protected void setTranslationProvider(TranslationProvider givenI18nProvider) {
 144         logger.trace("setTranslationProvider(): provided translation={}.", givenI18nProvider);
 145         i18nProvider = givenI18nProvider;
 146         updateLocalization();
 147     }
 148
 149     // Utility methods
 150
 151     @Override
 152     public boolean supportsThingType(ThingTypeUID thingTypeUID) {
 153         boolean result = VeluxBindingConstants.SUPPORTED_THINGS_BINDING.contains(thingTypeUID)
 154                 || VeluxBindingConstants.SUPPORTED_THINGS_BRIDGE.contains(thingTypeUID)
 155                 || VeluxBindingConstants.SUPPORTED_THINGS_ITEMS.contains(thingTypeUID);
 156         logger.trace("supportsThingType({}) called and returns {}.", thingTypeUID, result);
 157         return result;
 158     }
 159
 160     @Override
 161     protected @Nullable ThingHandler createHandler(Thing thing) {
 162         ThingHandler resultHandler = null;
 163         ThingTypeUID thingTypeUID = thing.getThingTypeUID();
 164
 165         // Handle Binding creation
 166         if (VeluxBindingConstants.SUPPORTED_THINGS_BINDING.contains(thingTypeUID)) {
 167             resultHandler = createBindingHandler(thing);
 168         } else
 169         // Handle Bridge creation
 170         if (VeluxBindingConstants.SUPPORTED_THINGS_BRIDGE.contains(thingTypeUID)) {
 171             resultHandler = createBridgeHandler(thing);
 172         } else
 173         // Handle creation of Things behind the Bridge
 174         if (VeluxBindingConstants.SUPPORTED_THINGS_ITEMS.contains(thingTypeUID)) {
 175             resultHandler = createThingHandler(thing);
 176         } else {
 177             logger.warn("createHandler({}) failed: ThingHandler not found for {}.", thingTypeUID, thing.getLabel());
 178         }
 179         updateBindingState();
 180         return resultHandler;
 181     }
 182
 183     @Override
 184     protected void removeHandler(ThingHandler thingHandler) {
 185         // Handle Binding removal
 186         if (thingHandler instanceof VeluxBindingHandler) {
 187             logger.trace("removeHandler() removing information element '{}'.", thingHandler.toString());
 188             veluxBindingHandlers.remove(thingHandler);
 189         } else
 190         // Handle Bridge removal
 191         if (thingHandler instanceof VeluxBridgeHandler) {
 192             logger.trace("removeHandler() removing bridge '{}'.", thingHandler.toString());
 193             veluxBridgeHandlers.remove(thingHandler);
 194             unregisterDeviceDiscoveryService(thingHandler.getThing().getUID());
 195         } else
 196         // Handle removal of Things behind the Bridge
 197         if (thingHandler instanceof VeluxHandler) {
 198             logger.trace("removeHandler() removing thing '{}'.", thingHandler.toString());
 199             veluxHandlers.remove(thingHandler);
 200         }
 201         updateBindingState();
 202         super.removeHandler(thingHandler);
 203     }
 204 }