content: /*
   * Copyright (C) 2020 ActiveJ LLC.
   *
   * Licensed 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 io.activej.ot.system;
  
  import io.activej.ot.TransformResult;
  import io.activej.ot.exception.TransformException;
  
  import java.util.List;
  
  public interface OTSystem<D> {
  
  	TransformResult<D> transform(List<? extends D> leftDiffs, List<? extends D> rightDiffs) throws TransformException;
  
  	default TransformResult<D> transform(D leftDiff, D rightDiff) throws TransformException {
  		return transform(List.of(leftDiff), List.of(rightDiff));
  	}
  
  	List<D> squash(List<? extends D> ops);
  
  	boolean isEmpty(D op);
  
  	<O extends D> List<D> invert(List<O> ops);
  }
  