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

   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.netatmo.internal.deserialization;
  14
  15 import java.time.Instant;
  16 import java.time.ZonedDateTime;
  17
  18 import org.eclipse.jdt.annotation.NonNullByDefault;
  19 import org.eclipse.jdt.annotation.Nullable;
  20 import org.openhab.binding.netatmo.internal.api.NetatmoException;
  21 import org.openhab.core.i18n.TimeZoneProvider;
  22 import org.openhab.core.library.types.OnOffType;
  23 import org.openhab.core.library.types.OpenClosedType;
  24 import org.osgi.service.component.annotations.Activate;
  25 import org.osgi.service.component.annotations.Component;
  26 import org.osgi.service.component.annotations.Reference;
  27
  28 import com.google.gson.FieldNamingPolicy;
  29 import com.google.gson.Gson;
  30 import com.google.gson.GsonBuilder;
  31 import com.google.gson.JsonDeserializer;
  32 import com.google.gson.JsonSyntaxException;
  33
  34 /**
  35  * The {@link NADeserializer} is responsible to instantiate suitable Gson (de)serializer
  36  *
  37  * @author Gaël L'hopital - Initial contribution
  38  */
  39 @NonNullByDefault
  40 @Component(service = NADeserializer.class)
  41 public class NADeserializer {
  42     private final Gson gson;
  43
  44     @Activate
  45     public NADeserializer(@Reference TimeZoneProvider timeZoneProvider) {
  46         gson = new GsonBuilder().setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
  47                 .registerTypeAdapterFactory(new StrictEnumTypeAdapterFactory())
  48                 .registerTypeAdapter(NAObjectMap.class, new NAObjectMapDeserializer())
  49                 .registerTypeAdapter(NAPushType.class, new NAPushTypeDeserializer())
  50                 .registerTypeAdapter(ZonedDateTime.class,
  51                         (JsonDeserializer<ZonedDateTime>) (json, type, jsonDeserializationContext) -> {
  52                             long netatmoTS = json.getAsJsonPrimitive().getAsLong();
  53                             Instant i = Instant.ofEpochSecond(netatmoTS);
  54                             return ZonedDateTime.ofInstant(i, timeZoneProvider.getTimeZone());
  55                         })
  56                 .registerTypeAdapter(OnOffType.class,
  57                         (JsonDeserializer<OnOffType>) (json, type, jsonDeserializationContext) -> OnOffType
  58                                 .from(json.getAsJsonPrimitive().getAsString()))
  59                 .registerTypeAdapter(OpenClosedType.class,
  60                         (JsonDeserializer<OpenClosedType>) (json, type, jsonDeserializationContext) -> {
  61                             String value = json.getAsJsonPrimitive().getAsString().toUpperCase();
  62                             return "TRUE".equals(value) || "1".equals(value) ? OpenClosedType.CLOSED
  63                                     : OpenClosedType.OPEN;
  64                         })
  65                 .create();
  66     }
  67
  68     public <T> T deserialize(Class<T> clazz, String json) throws NetatmoException {
  69         try {
  70             @Nullable
  71             T result = gson.fromJson(json, clazz);
  72             if (result != null) {
  73                 return result;
  74             }
  75             throw new NetatmoException("Deserialization of '%s' resulted in null value", json);
  76         } catch (JsonSyntaxException e) {
  77             throw new NetatmoException(e, "Unexpected error deserializing '%s'", json);
  78         }
  79     }
  80 }