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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.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.binding.netatmo.internal.api.data.ModuleType;
  22 import org.openhab.binding.netatmo.internal.api.dto.HomeData;
  23 import org.openhab.binding.netatmo.internal.api.dto.NAHomeStatus;
  24 import org.openhab.binding.netatmo.internal.api.dto.NAHomeStatus.HomeStatus;
  25 import org.openhab.core.i18n.TimeZoneProvider;
  26 import org.openhab.core.library.types.OnOffType;
  27 import org.openhab.core.library.types.OpenClosedType;
  28 import org.osgi.service.component.annotations.Activate;
  29 import org.osgi.service.component.annotations.Component;
  30 import org.osgi.service.component.annotations.Reference;
  31
  32 import com.google.gson.FieldNamingPolicy;
  33 import com.google.gson.Gson;
  34 import com.google.gson.GsonBuilder;
  35 import com.google.gson.JsonDeserializer;
  36 import com.google.gson.JsonSyntaxException;
  37
  38 /**
  39  * The {@link NADeserializer} is responsible to instantiate suitable Gson (de)serializer
  40  *
  41  * @author Gaël L'hopital - Initial contribution
  42  */
  43 @NonNullByDefault
  44 @Component(service = NADeserializer.class)
  45 public class NADeserializer {
  46     private final Gson gson;
  47
  48     @Activate
  49     public NADeserializer(@Reference TimeZoneProvider timeZoneProvider) {
  50         gson = new GsonBuilder().setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
  51                 .registerTypeAdapterFactory(new StrictEnumTypeAdapterFactory())
  52                 .registerTypeAdapter(NAObjectMap.class, new NAObjectMapDeserializer())
  53                 .registerTypeAdapter(NAPushType.class, new NAPushTypeDeserializer())
  54                 .registerTypeAdapter(ModuleType.class, new ModuleTypeDeserializer())
  55                 .registerTypeAdapter(HomeStatus.class,
  56                         (JsonDeserializer<HomeStatus>) (json, type, context) -> context.deserialize(json,
  57                                 json.getAsJsonObject().has("persons") ? NAHomeStatus.Security.class
  58                                         : NAHomeStatus.Energy.class))
  59                 .registerTypeAdapter(HomeData.class,
  60                         (JsonDeserializer<HomeData>) (json, type, context) -> context.deserialize(json,
  61                                 json.getAsJsonObject().has("therm_mode") ? HomeData.Energy.class
  62                                         : HomeData.Security.class))
  63                 .registerTypeAdapter(ZonedDateTime.class, (JsonDeserializer<ZonedDateTime>) (json, type, context) -> {
  64                     long netatmoTS = json.getAsJsonPrimitive().getAsLong();
  65                     Instant i = Instant.ofEpochSecond(netatmoTS);
  66                     return ZonedDateTime.ofInstant(i, timeZoneProvider.getTimeZone());
  67                 })
  68                 .registerTypeAdapter(OnOffType.class,
  69                         (JsonDeserializer<OnOffType>) (json, type, context) -> OnOffType
  70                                 .from(json.getAsJsonPrimitive().getAsString()))
  71                 .registerTypeAdapter(OpenClosedType.class, (JsonDeserializer<OpenClosedType>) (json, type, context) -> {
  72                     String value = json.getAsJsonPrimitive().getAsString().toUpperCase();
  73                     return "TRUE".equals(value) || "1".equals(value) ? OpenClosedType.CLOSED : OpenClosedType.OPEN;
  74                 }).create();
  75     }
  76
  77     public <T> T deserialize(Class<T> clazz, String json) throws NetatmoException {
  78         try {
  79             @Nullable
  80             T result = gson.fromJson(json, clazz);
  81             if (result != null) {
  82                 return result;
  83             }
  84             throw new NetatmoException("Deserialization of '%s' resulted in null value", json);
  85         } catch (JsonSyntaxException e) {
  86             throw new NetatmoException(e, "Unexpected error deserializing '%s'", json);
  87         }
  88     }
  89 }