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   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.dbquery.internal;
  14
  15 import org.eclipse.jdt.annotation.NonNullByDefault;
  16 import org.eclipse.jdt.annotation.Nullable;
  17 import org.openhab.binding.dbquery.internal.error.UnnexpectedCondition;
  18 import org.openhab.core.library.types.DateTimeType;
  19 import org.openhab.core.library.types.DecimalType;
  20 import org.openhab.core.library.types.OnOffType;
  21 import org.openhab.core.library.types.OpenClosedType;
  22 import org.openhab.core.library.types.StringType;
  23 import org.openhab.core.thing.Channel;
  24 import org.openhab.core.thing.type.ChannelTypeUID;
  25 import org.openhab.core.types.State;
  26 import org.openhab.core.types.UnDefType;
  27
  28 /**
  29  * Updates a query result to needed channels doing needed conversions
  30  *
  31  * @author Joan Pujol - Initial contribution
  32  */
  33 @NonNullByDefault
  34 public class QueryResultChannelUpdater {
  35     private final ChannelStateUpdater channelStateUpdater;
  36     private final ChannelsToUpdateQueryResult channels2Update;
  37     private final Value2StateConverter value2StateConverter;
  38
  39     public QueryResultChannelUpdater(ChannelStateUpdater channelStateUpdater,
  40             ChannelsToUpdateQueryResult channelsToUpdate) {
  41         this.channelStateUpdater = channelStateUpdater;
  42         this.channels2Update = channelsToUpdate;
  43         this.value2StateConverter = new Value2StateConverter();
  44     }
  45
  46     public void clearChannelResults() {
  47         for (Channel channel : channels2Update.getChannels()) {
  48             channelStateUpdater.updateChannelState(channel, UnDefType.NULL);
  49         }
  50     }
  51
  52     public void updateChannelResults(@Nullable Object extractedResult) {
  53         for (Channel channel : channels2Update.getChannels()) {
  54             Class<? extends State> targetType = calculateItemType(channel);
  55             State state = value2StateConverter.convertValue(extractedResult, targetType);
  56             channelStateUpdater.updateChannelState(channel, state);
  57         }
  58     }
  59
  60     private Class<? extends State> calculateItemType(Channel channel) {
  61         ChannelTypeUID channelTypeUID = channel.getChannelTypeUID();
  62         String channelID = channelTypeUID != null ? channelTypeUID.getId()
  63                 : DBQueryBindingConstants.RESULT_STRING_CHANNEL_TYPE;
  64         switch (channelID) {
  65             case DBQueryBindingConstants.RESULT_STRING_CHANNEL_TYPE:
  66                 return StringType.class;
  67             case DBQueryBindingConstants.RESULT_NUMBER_CHANNEL_TYPE:
  68                 return DecimalType.class;
  69             case DBQueryBindingConstants.RESULT_DATETIME_CHANNEL_TYPE:
  70                 return DateTimeType.class;
  71             case DBQueryBindingConstants.RESULT_SWITCH_CHANNEL_TYPE:
  72                 return OnOffType.class;
  73             case DBQueryBindingConstants.RESULT_CONTACT_CHANNEL_TYPE:
  74                 return OpenClosedType.class;
  75             default:
  76                 throw new UnnexpectedCondition("Unexpected channel type " + channelTypeUID);
  77         }
  78     }
  79 }