/* * Copyright 2017-2020 original authors * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * https://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package io.micronaut.configuration.kafka.serde; import io.micronaut.core.async.publisher.Publishers; import io.micronaut.core.order.Ordered; import io.micronaut.core.type.Argument; import org.apache.kafka.common.serialization.ByteArrayDeserializer; import org.apache.kafka.common.serialization.Deserializer; import org.apache.kafka.common.serialization.Serde; import org.apache.kafka.common.serialization.Serializer; import java.util.Optional; import java.util.concurrent.Future; /** * A registry of Kafka {@link org.apache.kafka.common.serialization.Serde} instances. * * @author Graeme Rocher * @since 1.0 */ public interface SerdeRegistry extends Ordered { /** * Obtain a {@link Serde} for the given type. * * @param <T> The generic type * @param type The type * @return The {@link Serde} */ <T> Serde<T> getSerde(Class<T> type); /** * Obtain a {@link Serializer} for the given type. * * @param <T> The generic type * @param type The type * @return The {@link Serde} */ @SuppressWarnings("unchecked") default <T> Serializer<T> getSerializer(Class<T> type) { return getSerde(type).serializer(); } /** * Obtain a {@link Deserializer} for the given type. * * @param <T> The generic type * @param type The type * @return The {@link Serde} */ @SuppressWarnings("unchecked") default <T> Deserializer<T> getDeserializer(Class<T> type) { return getSerde(type).deserializer(); } /** * Picks the most appropriate {@link Deserializer} for the given argument. * * @param argument The argument * @param <T> The generic type * @return The {@link Deserializer} */ @SuppressWarnings("unchecked") default <T> Deserializer<T> pickDeserializer(Argument<T> argument) { Class<T> type = argument.getType(); if (Publishers.isConvertibleToPublisher(type) || Future.class.isAssignableFrom(type)) { Optional<Argument<?>> typeArg = argument.getFirstTypeVariable(); if (typeArg.isPresent()) { type = (Class<T>) typeArg.get().getType(); } else { return (Deserializer<T>) new ByteArrayDeserializer(); } } return getDeserializer(type); } /** * Picks the most appropriate {@link Deserializer} for the given argument. * * @param argument The argument * @param <T> The generic type * @return The {@link Deserializer} */ @SuppressWarnings("unchecked") default <T> Serializer<T> pickSerializer(Argument<T> argument) { Class<T> type = argument.getType(); if (Publishers.isConvertibleToPublisher(type) || Future.class.isAssignableFrom(type)) { Optional<Argument<?>> typeArg = argument.getFirstTypeVariable(); if (typeArg.isPresent()) { type = (Class<T>) typeArg.get().getType(); } else { return (Serializer<T>) new ByteArrayDeserializer(); } } return getSerializer(type); } }