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.twister2.translators.functions;
  
  import edu.iu.dsc.tws.api.comms.structs.Tuple;
  import edu.iu.dsc.tws.api.tset.TSetContext;
  import edu.iu.dsc.tws.api.tset.fn.MapFunc;
  import java.io.ObjectStreamException;
  import java.util.logging.Logger;
  import org.apache.beam.runners.twister2.utils.TranslationUtils;
  import org.apache.beam.sdk.coders.Coder;
  import org.apache.beam.sdk.coders.CoderException;
  import org.apache.beam.sdk.util.CoderUtils;
  import org.apache.beam.sdk.util.SerializableUtils;
  import org.apache.beam.sdk.values.KV;
  import org.apache.beam.sdk.values.WindowedValue;
  import org.apache.beam.sdk.values.WindowedValues;
  import org.apache.beam.sdk.values.WindowedValues.WindowedValueCoder;
  
  /** ByteToWindow function. */
  @SuppressWarnings({
    "nullness" // TODO(https://github.com/apache/beam/issues/20497)
  })
  public class ByteToWindowFunctionPrimitive<K, V>
      implements MapFunc<WindowedValue<KV<K, V>>, Tuple<byte[], byte[]>> {
    private transient Coder<K> keyCoder;
    private transient WindowedValueCoder<V> wvCoder;
    private static final Logger LOG = Logger.getLogger(ByteToWindowFunctionPrimitive.class.getName());
  
    private transient boolean isInitialized = false;
    private byte[] keyCoderBytes;
    private byte[] wvCoderBytes;
  
    public ByteToWindowFunctionPrimitive() {
      // non arg constructor needed for kryo
      isInitialized = false;
    }
  
    public ByteToWindowFunctionPrimitive(
        final Coder<K> inputKeyCoder, final WindowedValueCoder<V> wvCoder) {
      this.keyCoder = inputKeyCoder;
      this.wvCoder = wvCoder;
  
      keyCoderBytes = SerializableUtils.serializeToByteArray(keyCoder);
      wvCoderBytes = SerializableUtils.serializeToByteArray(wvCoder);
    }
  
    @Override
    public WindowedValue<KV<K, V>> map(Tuple<byte[], byte[]> input) {
      K key = null;
      WindowedValue<V> value = null;
      try {
        key = CoderUtils.decodeFromByteArray(keyCoder, input.getKey());
  
        value = TranslationUtils.fromByteArray(input.getValue(), wvCoder);
      } catch (CoderException e) {
        LOG.info(e.getMessage());
      }
      WindowedValue<KV<K, V>> element;
  
      if (value == null) {
        value = WindowedValues.valueInGlobalWindow(null);
      }
      element =
          WindowedValues.of(
              KV.of(key, value.getValue()),
              value.getTimestamp(),
              value.getWindows(),
              value.getPaneInfo());
  
      return element;
    }
  
    @Override
    public void prepare(TSetContext context) {
      initTransient();
    }
  
    /**
     * Method used to initialize the transient variables that were sent over as byte arrays or proto
     * buffers.
     */
    private void initTransient() {
      if (isInitialized) {
        return;
      }
  
      keyCoder =
          (Coder<K>) SerializableUtils.deserializeFromByteArray(keyCoderBytes, "Custom Coder Bytes");
      wvCoder =
          (WindowedValueCoder<V>)
              SerializableUtils.deserializeFromByteArray(wvCoderBytes, "Custom Coder Bytes");
      this.isInitialized = true;
    }
  
    protected Object readResolve() throws ObjectStreamException {
      return this;
    }
  }
  