content: /*
   * Copyright (C) 2015-2025 Lightbend Inc. <https://www.lightbend.com>
   */
  
  package jdocs.ddata.protobuf;
  
  // #serializer
  import akka.actor.ExtendedActorSystem;
  import akka.cluster.ddata.GSet;
  import akka.cluster.ddata.protobuf.AbstractSerializationSupport;
  import docs.ddata.protobuf.msg.TwoPhaseSetMessages;
  import docs.ddata.protobuf.msg.TwoPhaseSetMessages.TwoPhaseSet.Builder;
  import java.util.ArrayList;
  import java.util.Collections;
  import jdocs.ddata.TwoPhaseSet;
  
  public class TwoPhaseSetSerializer extends AbstractSerializationSupport {
  
    private final ExtendedActorSystem system;
  
    public TwoPhaseSetSerializer(ExtendedActorSystem system) {
      this.system = system;
    }
  
    @Override
    public ExtendedActorSystem system() {
      return this.system;
    }
  
    @Override
    public boolean includeManifest() {
      return false;
    }
  
    @Override
    public int identifier() {
      return 99998;
    }
  
    @Override
    public byte[] toBinary(Object obj) {
      if (obj instanceof TwoPhaseSet) {
        return twoPhaseSetToProto((TwoPhaseSet) obj).toByteArray();
      } else {
        throw new IllegalArgumentException("Can't serialize object of type " + obj.getClass());
      }
    }
  
    @Override
    public Object fromBinaryJava(byte[] bytes, Class<?> manifest) {
      return twoPhaseSetFromBinary(bytes);
    }
  
    protected TwoPhaseSetMessages.TwoPhaseSet twoPhaseSetToProto(TwoPhaseSet twoPhaseSet) {
      Builder b = TwoPhaseSetMessages.TwoPhaseSet.newBuilder();
      ArrayList<String> adds = new ArrayList<>(twoPhaseSet.adds.getElements());
      if (!adds.isEmpty()) {
        Collections.sort(adds);
        b.addAllAdds(adds);
      }
      ArrayList<String> removals = new ArrayList<>(twoPhaseSet.removals.getElements());
      if (!removals.isEmpty()) {
        Collections.sort(removals);
        b.addAllRemovals(removals);
      }
      return b.build();
    }
  
    protected TwoPhaseSet twoPhaseSetFromBinary(byte[] bytes) {
      try {
        TwoPhaseSetMessages.TwoPhaseSet msg = TwoPhaseSetMessages.TwoPhaseSet.parseFrom(bytes);
        GSet<String> adds = GSet.create();
        for (String elem : msg.getAddsList()) {
          adds = adds.add(elem);
        }
        GSet<String> removals = GSet.create();
        for (String elem : msg.getRemovalsList()) {
          removals = removals.add(elem);
        }
        // GSet will accumulate deltas when adding elements,
        // but those are not of interest in the result of the deserialization
        return new TwoPhaseSet(adds.resetDelta(), removals.resetDelta());
      } catch (Exception e) {
        throw new RuntimeException(e.getMessage(), e);
      }
    }
  }
  // #serializer
  