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.core;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.util.List;
  import org.apache.beam.runners.core.TimerInternals.TimerData;
  import org.apache.beam.runners.core.TimerInternals.TimerDataCoderV2;
  import org.apache.beam.sdk.coders.Coder;
  import org.apache.beam.sdk.coders.CoderException;
  import org.apache.beam.sdk.coders.IterableCoder;
  import org.apache.beam.sdk.coders.StructuredCoder;
  import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
  import org.apache.beam.sdk.values.WindowedValue;
  import org.apache.beam.sdk.values.WindowedValues.FullWindowedValueCoder;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableList;
  
  /** A {@link Coder} for {@link KeyedWorkItem KeyedWorkItems}. */
  public class KeyedWorkItemCoder<K, ElemT> extends StructuredCoder<KeyedWorkItem<K, ElemT>> {
    /**
     * Create a new {@link KeyedWorkItemCoder} with the provided key coder, element coder, and window
     * coder.
     */
    public static <K, ElemT> KeyedWorkItemCoder<K, ElemT> of(
        Coder<K> keyCoder, Coder<ElemT> elemCoder, Coder<? extends BoundedWindow> windowCoder) {
      return new KeyedWorkItemCoder<>(keyCoder, elemCoder, windowCoder);
    }
  
    private final Coder<K> keyCoder;
    private final Coder<ElemT> elemCoder;
    private final Coder<? extends BoundedWindow> windowCoder;
    private final Coder<Iterable<TimerData>> timersCoder;
    private final Coder<Iterable<WindowedValue<ElemT>>> elemsCoder;
  
    private KeyedWorkItemCoder(
        Coder<K> keyCoder, Coder<ElemT> elemCoder, Coder<? extends BoundedWindow> windowCoder) {
      this.keyCoder = keyCoder;
      this.elemCoder = elemCoder;
      this.windowCoder = windowCoder;
      this.timersCoder = IterableCoder.of(TimerDataCoderV2.of(windowCoder));
      this.elemsCoder = IterableCoder.of(FullWindowedValueCoder.of(elemCoder, windowCoder));
    }
  
    public Coder<K> getKeyCoder() {
      return keyCoder;
    }
  
    public Coder<ElemT> getElementCoder() {
      return elemCoder;
    }
  
    @Override
    public void encode(KeyedWorkItem<K, ElemT> value, OutputStream outStream)
        throws CoderException, IOException {
      keyCoder.encode(value.key(), outStream);
      timersCoder.encode(value.timersIterable(), outStream);
      elemsCoder.encode(value.elementsIterable(), outStream);
    }
  
    @Override
    public KeyedWorkItem<K, ElemT> decode(InputStream inStream) throws CoderException, IOException {
      K key = keyCoder.decode(inStream);
      Iterable<TimerData> timers = timersCoder.decode(inStream);
      Iterable<WindowedValue<ElemT>> elems = elemsCoder.decode(inStream);
      return KeyedWorkItems.workItem(key, timers, elems);
    }
  
    @Override
    public List<? extends Coder<?>> getCoderArguments() {
      return ImmutableList.of(keyCoder, elemCoder, windowCoder);
    }
  
    @Override
    public void verifyDeterministic() throws Coder.NonDeterministicException {
      keyCoder.verifyDeterministic();
      timersCoder.verifyDeterministic();
      elemsCoder.verifyDeterministic();
    }
  
    /**
     * {@inheritDoc}.
     *
     * <p>{@link KeyedWorkItemCoder} is not consistent with equals as it can return a {@link
     * KeyedWorkItem} of a type different from the originally encoded type.
     */
    @Override
    public boolean consistentWithEquals() {
      return false;
    }
  }
  