| /* |
| * 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.api.common.typeutils; |
| |
| import org.apache.flink.annotation.Internal; |
| import org.apache.flink.api.java.tuple.Tuple2; |
| import org.apache.flink.core.memory.DataInputView; |
| import org.apache.flink.core.memory.DataOutputView; |
| import org.apache.flink.util.Preconditions; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * A {@link TypeSerializerConfigSnapshot} for serializers that has multiple nested serializers. |
| * The configuration snapshot consists of the configuration snapshots of all nested serializers, and |
| * also the nested serializers themselves. |
| * |
| * <p>Both the nested serializers and the configuration snapshots are written as configuration of |
| * composite serializers, so that on restore, the previous serializer may be used in case migration |
| * is required. |
| */ |
| @Internal |
| public abstract class CompositeTypeSerializerConfigSnapshot extends TypeSerializerConfigSnapshot { |
| |
| private List<Tuple2<TypeSerializer<?>, TypeSerializerConfigSnapshot>> nestedSerializersAndConfigs; |
| |
| /** This empty nullary constructor is required for deserializing the configuration. */ |
| public CompositeTypeSerializerConfigSnapshot() {} |
| |
| public CompositeTypeSerializerConfigSnapshot(TypeSerializer<?>... nestedSerializers) { |
| Preconditions.checkNotNull(nestedSerializers); |
| |
| this.nestedSerializersAndConfigs = new ArrayList<>(nestedSerializers.length); |
| for (TypeSerializer<?> nestedSerializer : nestedSerializers) { |
| TypeSerializerConfigSnapshot configSnapshot = nestedSerializer.snapshotConfiguration(); |
| this.nestedSerializersAndConfigs.add( |
| new Tuple2<TypeSerializer<?>, TypeSerializerConfigSnapshot>( |
| nestedSerializer.duplicate(), |
| Preconditions.checkNotNull(configSnapshot))); |
| } |
| } |
| |
| @Override |
| public void write(DataOutputView out) throws IOException { |
| super.write(out); |
| TypeSerializerSerializationUtil.writeSerializersAndConfigsWithResilience(out, nestedSerializersAndConfigs); |
| } |
| |
| @Override |
| public void read(DataInputView in) throws IOException { |
| super.read(in); |
| this.nestedSerializersAndConfigs = |
| TypeSerializerSerializationUtil.readSerializersAndConfigsWithResilience(in, getUserCodeClassLoader()); |
| } |
| |
| public List<Tuple2<TypeSerializer<?>, TypeSerializerConfigSnapshot>> getNestedSerializersAndConfigs() { |
| return nestedSerializersAndConfigs; |
| } |
| |
| public Tuple2<TypeSerializer<?>, TypeSerializerConfigSnapshot> getSingleNestedSerializerAndConfig() { |
| return nestedSerializersAndConfigs.get(0); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == this) { |
| return true; |
| } |
| |
| if (obj == null) { |
| return false; |
| } |
| |
| return (obj.getClass().equals(getClass())) |
| && nestedSerializersAndConfigs.equals(((CompositeTypeSerializerConfigSnapshot) obj).getNestedSerializersAndConfigs()); |
| } |
| |
| @Override |
| public int hashCode() { |
| return nestedSerializersAndConfigs.hashCode(); |
| } |
| } |