content: /*
   * 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.beam.runners.flink.translation.types;
  
  import java.io.IOException;
  import javax.annotation.Nullable;
  import org.apache.beam.sdk.util.SerializableUtils;
  import org.apache.flink.api.common.typeutils.TypeSerializer;
  import org.apache.flink.api.common.typeutils.TypeSerializerSchemaCompatibility;
  import org.apache.flink.api.common.typeutils.TypeSerializerSnapshot;
  import org.apache.flink.core.io.VersionedIOReadableWritable;
  import org.apache.flink.core.memory.DataInputView;
  import org.apache.flink.core.memory.DataOutputView;
  import org.apache.flink.util.TemporaryClassLoaderContext;
  
  /** A legacy snapshot which does not care about schema compatibility. */
  @SuppressWarnings("allcheckers")
  public class UnversionedTypeSerializerSnapshot<T> implements TypeSerializerSnapshot<T> {
  
    private @Nullable CoderTypeSerializer<T> serializer;
  
    /** Needs to be public to work with {@link VersionedIOReadableWritable}. */
    public UnversionedTypeSerializerSnapshot() {
      this(null);
    }
  
    @SuppressWarnings("initialization")
    public UnversionedTypeSerializerSnapshot(CoderTypeSerializer<T> serializer) {
      this.serializer = serializer;
    }
  
    @Override
    public int getCurrentVersion() {
      return 1;
    }
  
    @Override
    public void writeSnapshot(DataOutputView dataOutputView) throws IOException {
      byte[] bytes = SerializableUtils.serializeToByteArray(serializer);
      dataOutputView.writeInt(bytes.length);
      dataOutputView.write(bytes);
    }
  
    @SuppressWarnings("unchecked")
    @Override
    public void readSnapshot(int version, DataInputView dataInputView, ClassLoader classLoader)
        throws IOException {
  
      try (TemporaryClassLoaderContext context = TemporaryClassLoaderContext.of(classLoader)) {
        int length = dataInputView.readInt();
        byte[] bytes = new byte[length];
        dataInputView.readFully(bytes);
        this.serializer =
            (CoderTypeSerializer<T>)
                SerializableUtils.deserializeFromByteArray(
                    bytes, CoderTypeSerializer.class.getName());
      }
    }
  
    @Override
    public TypeSerializer<T> restoreSerializer() {
      return serializer;
    }
  
    @Override
    public TypeSerializerSchemaCompatibility<T> resolveSchemaCompatibility(
        TypeSerializer<T> newSerializer) {
  
      return TypeSerializerSchemaCompatibility.compatibleAsIs();
    }
  }
  