spring-kafka StringOrBytesSerializer 源码
spring-kafka StringOrBytesSerializer 代码
文件路径：/spring-kafka/src/main/java/org/springframework/kafka/support/serializer/StringOrBytesSerializer.java
/*
* Copyright 2019 the original author or 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 org.springframework.kafka.support.serializer;
import java.util.Map;
import org.apache.kafka.common.serialization.Serializer;
import org.apache.kafka.common.serialization.StringSerializer;
import org.apache.kafka.common.utils.Bytes;
/**
* A serializer that can handle {@code byte[]}, {@link Bytes} and {@link String}.
* Convenient when used with one of the Json message converters.
*
* @author Gary Russell
* @since 2.3
*
*/
public class StringOrBytesSerializer implements Serializer<Object> {
private final StringSerializer stringSerializer = new StringSerializer();
@Override
public void configure(Map<String, ?> configs, boolean isKey) {
this.stringSerializer.configure(configs, isKey);
}
@Override
public byte[] serialize(String topic, Object data) {
if (data instanceof byte[]) {
return (byte[]) data;
}
else if (data instanceof Bytes) {
return ((Bytes) data).get();
}
else if (data instanceof String) {
return this.stringSerializer.serialize(topic, (String) data);
}
else if (data == null) {
return null;
}
else {
throw new IllegalStateException("This serializer can only handle byte[], Bytes or String values");
}
}
@Override
public void close() {
this.stringSerializer.close();
}
}
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