/** * Configures Gson for custom serialization or deserialization. This method combines the * registration of an {@link TypeAdapter}, {@link InstanceCreator}, {@link JsonSerializer}, and a * {@link JsonDeserializer}. It is best used when a single object {@code typeAdapter} implements * all the required interfaces for custom serialization with Gson. If a type adapter was * previously registered for the specified {@code type}, it is overwritten. * * <p>This registers the type specified and no other types: you must manually register related * types! For example, applications registering {@code boolean.class} should also register {@code * Boolean.class}. * * @param type the type definition for the type adapter being registered * @param typeAdapter This object must implement at least one of the {@link TypeAdapter}, * {@link InstanceCreator}, {@link JsonSerializer}, and a {@link JsonDeserializer} interfaces. * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern */ @SuppressWarnings({"unchecked", "rawtypes"}) public GsonBuilder registerTypeAdapter(Type type, Object typeAdapter) { $Gson$Preconditions.checkArgument(typeAdapter instanceof JsonSerializer<?> || typeAdapter instanceof JsonDeserializer<?> || typeAdapter instanceof InstanceCreator<?> || typeAdapter instanceof TypeAdapter<?>); if (typeAdapter instanceof InstanceCreator<?>) { instanceCreators.put(type, (InstanceCreator) typeAdapter); } if (typeAdapter instanceof JsonSerializer<?> || typeAdapter instanceof JsonDeserializer<?>) { TypeToken<?> typeToken = TypeToken.get(type); factories.add(TreeTypeAdapter.newFactoryWithMatchRawType(typeToken, typeAdapter)); } if (typeAdapter instanceof TypeAdapter<?>) { factories.add(TypeAdapters.newFactory(TypeToken.get(type), (TypeAdapter)typeAdapter)); } return this; }
/** * Configures Gson for custom serialization or deserialization for an inheritance type hierarchy. * This method combines the registration of a {@link TypeAdapter}, {@link JsonSerializer} and * a {@link JsonDeserializer}. If a type adapter was previously registered for the specified * type hierarchy, it is overridden. If a type adapter is registered for a specific type in * the type hierarchy, it will be invoked instead of the one registered for the type hierarchy. * * @param baseType the class definition for the type adapter being registered for the base class * or interface * @param typeAdapter This object must implement at least one of {@link TypeAdapter}, * {@link JsonSerializer} or {@link JsonDeserializer} interfaces. * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern * @since 1.7 */ @SuppressWarnings({"unchecked", "rawtypes"}) public GsonBuilder registerTypeHierarchyAdapter(Class<?> baseType, Object typeAdapter) { $Gson$Preconditions.checkArgument(typeAdapter instanceof JsonSerializer<?> || typeAdapter instanceof JsonDeserializer<?> || typeAdapter instanceof TypeAdapter<?>); if (typeAdapter instanceof JsonDeserializer || typeAdapter instanceof JsonSerializer) { hierarchyFactories.add(0, TreeTypeAdapter.newTypeHierarchyFactory(baseType, typeAdapter)); } if (typeAdapter instanceof TypeAdapter<?>) { factories.add(TypeAdapters.newTypeHierarchyFactory(baseType, (TypeAdapter)typeAdapter)); } return this; }
private void addTypeAdaptersForDate(String datePattern, int dateStyle, int timeStyle, List<TypeAdapterFactory> factories) { DefaultDateTypeAdapter dateTypeAdapter; if (datePattern != null && !"".equals(datePattern.trim())) { dateTypeAdapter = new DefaultDateTypeAdapter(datePattern); } else if (dateStyle != DateFormat.DEFAULT && timeStyle != DateFormat.DEFAULT) { dateTypeAdapter = new DefaultDateTypeAdapter(dateStyle, timeStyle); } else { return; } factories.add(TreeTypeAdapter.newFactory(TypeToken.get(Date.class), dateTypeAdapter)); factories.add(TreeTypeAdapter.newFactory(TypeToken.get(Timestamp.class), dateTypeAdapter)); factories.add(TreeTypeAdapter.newFactory(TypeToken.get(java.sql.Date.class), dateTypeAdapter)); }
@Override @SuppressWarnings("unchecked") public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) { AnnotatedType detectedType = GenericTypeReflector.annotate(type.getType()); return environment.getInputConverters().stream() .filter(converter -> converter.supports(detectedType)).findFirst() .map(converter -> new ConvertingDeserializer(converter, environment, gson)) .map(deserializer -> new TreeTypeAdapter(null, deserializer, gson, type, this)) .orElse(null); }
