stevenzwu commented on a change in pull request #15924: URL: https://github.com/apache/flink/pull/15924#discussion_r641286065
########## File path: flink-connectors/flink-connector-base/src/main/java/org/apache/flink/connector/base/source/hybrid/HybridSourceEnumeratorStateSerializer.java ########## @@ -0,0 +1,90 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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 + * + * http://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.apache.flink.connector.base.source.hybrid; + +import org.apache.flink.core.io.SimpleVersionedSerializer; +import org.apache.flink.util.Preconditions; + +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.io.DataInputStream; +import java.io.DataOutputStream; +import java.io.IOException; +import java.util.List; + +/** The {@link SimpleVersionedSerializer Serializer} for the enumerator state. */ +public class HybridSourceEnumeratorStateSerializer + implements SimpleVersionedSerializer<HybridSourceEnumeratorState> { + + private static final int CURRENT_VERSION = 0; + + final List<SimpleVersionedSerializer<Object>> serializers; + + public HybridSourceEnumeratorStateSerializer( + List<SimpleVersionedSerializer<Object>> serializers) { + this.serializers = serializers; + } + + @Override + public int getVersion() { + return CURRENT_VERSION; + } + + @Override + public byte[] serialize(HybridSourceEnumeratorState enumState) throws IOException { + try (ByteArrayOutputStream baos = new ByteArrayOutputStream(); + DataOutputStream out = new DataOutputStream(baos)) { + out.writeInt(enumState.getCurrentSourceIndex()); + SimpleVersionedSerializer<Object> serializer = + serializerOf(enumState.getCurrentSourceIndex()); + out.writeInt(serializer.getVersion()); + byte[] enumStateBytes = serializer.serialize(enumState.getWrappedState()); + out.writeInt(enumStateBytes.length); + out.write(enumStateBytes); + return baos.toByteArray(); + } + } + + @Override + public HybridSourceEnumeratorState deserialize(int version, byte[] serialized) Review comment: nit: maybe replicate the pattern in HybridSourceSplitSerializer? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
