Examples with BsonReaderDecoder io.micronaut.serde.bson.BsonReaderDecoder used on opensource projects

Example 1 with BsonReaderDecoder

use of io.micronaut.serde.bson.BsonReaderDecoder in project micronaut-data by micronaut-projects.

the class DataDecoderContext method findCustomDeserializer.

@Override
public <T, D extends Deserializer<? extends T>> D findCustomDeserializer(Class<? extends D> deserializerClass) throws SerdeException {
    if (deserializerClass == OneRelationDeserializer.class) {
        OneRelationDeserializer oneRelationDeserializer = new OneRelationDeserializer() {

            @Override
            public Deserializer<Object> createSpecific(DecoderContext decoderContext, Argument<? super Object> type) throws SerdeException {
                Deserializer<?> relationDeser = findDeserializer(type);
                return new Deserializer<Object>() {

                    @Override
                    public Object deserialize(Decoder decoder, DecoderContext decoderContext, Argument<? super Object> type) throws IOException {
                        if (decoder.decodeNull()) {
                            return null;
                        }
                        CodecBsonDecoder<BsonDocument> codecBsonDecoder = new CodecBsonDecoder<>(new BsonDocumentCodec(codecRegistry));
                        BsonDocument document = codecBsonDecoder.deserialize(decoder, decoderContext, type);
                        if (document == null || document.size() <= 1) {
                            return null;
                        }
                        return relationDeser.deserialize(new BsonReaderDecoder(document.asBsonReader()), decoderContext, type);
                    }
                };
            }

            @Override
            public Object deserialize(Decoder decoder, DecoderContext decoderContext, Argument<? super Object> type) throws IOException {
                throw new IllegalStateException("Create specific call is required!");
            }
        };
        return (D) oneRelationDeserializer;
    }
    if (deserializerClass == IdDeserializer.class) {
        IdDeserializer idDeserializer = new IdDeserializer() {

            @Override
            public Deserializer<Object> createSpecific(DecoderContext decoderContext, Argument<? super Object> type) throws SerdeException {
                if (type.getType().isAssignableFrom(String.class) && type.isAnnotationPresent(GeneratedValue.class)) {
                    Deserializer<? extends ObjectId> deserializer = findDeserializer(OBJECT_ID);
                    return (decoder, decoderContext2, objectIdType) -> {
                        ObjectId objectId = deserializer.deserialize(decoder, decoderContext2, OBJECT_ID);
                        return objectId == null ? null : objectId.toHexString();
                    };
                }
                return (Deserializer<Object>) findDeserializer(type);
            }

            @Override
            public Object deserialize(Decoder decoder, DecoderContext decoderContext, Argument<? super Object> type) throws IOException {
                throw new IllegalStateException("Create specific call is required!");
            }
        };
        return (D) idDeserializer;
    }
    if (deserializerClass == CustomConverterDeserializer.class) {
        CustomConverterDeserializer customConverterDeserializer = new CustomConverterDeserializer() {

            @Override
            public Deserializer<Object> createSpecific(DecoderContext decoderContext, Argument<? super Object> type) throws SerdeException {
                Class<?> converterClass = type.getAnnotationMetadata().classValue(MappedProperty.class, "converter").orElseThrow(IllegalStateException::new);
                Class<Object> converterPersistedType = type.getAnnotationMetadata().classValue(MappedProperty.class, "converterPersistedType").orElseThrow(IllegalStateException::new);
                Argument<Object> convertedType = Argument.of(converterPersistedType);
                AttributeConverter<Object, Object> converter = attributeConverterRegistry.getConverter(converterClass);
                Deserializer<?> deserializer = findDeserializer(convertedType);
                return new Deserializer<Object>() {

                    @Override
                    public Object deserialize(Decoder decoder, DecoderContext decoderContext, Argument<? super Object> type) throws IOException {
                        if (decoder.decodeNull()) {
                            return null;
                        }
                        Object deserialized = deserializer.deserialize(decoder, decoderContext, convertedType);
                        return converter.convertToEntityValue(deserialized, ConversionContext.of(convertedType));
                    }
                };
            }

            @Override
            public Object deserialize(Decoder decoder, DecoderContext decoderContext, Argument<? super Object> type) throws IOException {
                throw new IllegalStateException("Create specific call is required!");
            }
        };
        return (D) customConverterDeserializer;
    }
    return parent.findCustomDeserializer(deserializerClass);
}