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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.opensprinkler.internal.handler;
  14
  15 import org.eclipse.jdt.annotation.NonNullByDefault;
  16 import org.eclipse.jdt.annotation.Nullable;
  17 import org.openhab.binding.opensprinkler.internal.api.OpenSprinklerApi;
  18 import org.openhab.core.thing.Bridge;
  19 import org.openhab.core.thing.ChannelUID;
  20 import org.openhab.core.thing.Thing;
  21 import org.openhab.core.thing.ThingStatus;
  22 import org.openhab.core.thing.ThingStatusDetail;
  23 import org.openhab.core.thing.ThingStatusInfo;
  24 import org.openhab.core.thing.binding.BaseThingHandler;
  25 import org.openhab.core.thing.binding.BridgeHandler;
  26
  27 /**
  28  * @author Florian Schmidt - Refactoring
  29  */
  30 @NonNullByDefault
  31 public abstract class OpenSprinklerBaseHandler extends BaseThingHandler {
  32     public OpenSprinklerBaseHandler(Thing thing) {
  33         super(thing);
  34     }
  35
  36     @Override
  37     public void bridgeStatusChanged(ThingStatusInfo bridgeStatusInfo) {
  38         super.bridgeStatusChanged(bridgeStatusInfo);
  39
  40         if (bridgeStatusInfo.getStatus() == ThingStatus.ONLINE) {
  41             updateStatus(ThingStatus.UNKNOWN);
  42         }
  43     }
  44
  45     @Nullable
  46     protected OpenSprinklerApi getApi() {
  47         Bridge bridge = getBridge();
  48         if (bridge == null) {
  49             return null;
  50         }
  51         BridgeHandler handler = bridge.getHandler();
  52         if (!(handler instanceof OpenSprinklerBaseBridgeHandler)) {
  53             return null;
  54         }
  55         try {
  56             return ((OpenSprinklerBaseBridgeHandler) handler).getApi();
  57         } catch (IllegalStateException e) {
  58             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.BRIDGE_OFFLINE);
  59             return null;
  60         }
  61     }
  62
  63     public void updateChannels() {
  64         this.getThing().getChannels().forEach(channel -> {
  65             updateChannel(channel.getUID());
  66         });
  67         if (getApi() != null) {
  68             updateStatus(ThingStatus.ONLINE);
  69         }
  70     }
  71
  72     protected abstract void updateChannel(ChannelUID uid);
  73 }