git.basschouten.com Git - openhab-addons.git/blob

   1 /**
   2  * Copyright (c) 2010-2023 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.amazonechocontrol.internal.smarthome;
  14
  15 import static org.openhab.binding.amazonechocontrol.internal.AmazonEchoControlBindingConstants.BINDING_ID;
  16
  17 import java.util.Locale;
  18
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.eclipse.jdt.annotation.Nullable;
  21 import org.openhab.binding.amazonechocontrol.internal.handler.SmartHomeDeviceHandler;
  22 import org.openhab.core.thing.Channel;
  23 import org.openhab.core.thing.Thing;
  24 import org.openhab.core.thing.ThingRegistry;
  25 import org.openhab.core.thing.binding.ThingHandler;
  26 import org.openhab.core.thing.type.ChannelTypeUID;
  27 import org.openhab.core.thing.type.DynamicStateDescriptionProvider;
  28 import org.openhab.core.types.StateDescription;
  29 import org.osgi.service.component.annotations.Activate;
  30 import org.osgi.service.component.annotations.Component;
  31 import org.osgi.service.component.annotations.Reference;
  32
  33 /**
  34  *
  35  * Dynamic channel state description provider
  36  * Overrides the state description for the colors of the smart bulbs
  37  *
  38  * @author Lukas Knoeller - Initial contribution
  39  *
  40  */
  41
  42 @Component(service = { DynamicStateDescriptionProvider.class, DynamicStateDescriptionSmartHome.class })
  43 @NonNullByDefault
  44 public class DynamicStateDescriptionSmartHome implements DynamicStateDescriptionProvider {
  45     private final ThingRegistry thingRegistry;
  46
  47     @Activate
  48     public DynamicStateDescriptionSmartHome(@Reference ThingRegistry thingRegistry) {
  49         this.thingRegistry = thingRegistry;
  50     }
  51
  52     public @Nullable SmartHomeDeviceHandler findHandler(Channel channel) {
  53         Thing thing = thingRegistry.get(channel.getUID().getThingUID());
  54         if (thing == null) {
  55             return null;
  56         }
  57         ThingHandler handler = thing.getHandler();
  58         if (handler instanceof SmartHomeDeviceHandler smartHomeHandler) {
  59             return smartHomeHandler;
  60         }
  61         return null;
  62     }
  63
  64     @Override
  65     public @Nullable StateDescription getStateDescription(Channel channel,
  66             @Nullable StateDescription originalStateDescription, @Nullable Locale locale) {
  67         ChannelTypeUID channelTypeUID = channel.getChannelTypeUID();
  68         if (channelTypeUID == null || !BINDING_ID.equals(channelTypeUID.getBindingId())) {
  69             return null;
  70         }
  71         if (originalStateDescription == null) {
  72             return null;
  73         }
  74         SmartHomeDeviceHandler handler = findHandler(channel);
  75         if (handler != null) {
  76             return handler.findStateDescription(channel, originalStateDescription, locale);
  77         }
  78         return null;
  79     }
  80 }