/*
 * 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.streampipes.manager.matching.output;

import org.apache.streampipes.model.SpDataStream;
import org.apache.streampipes.model.output.OutputStrategy;
import org.apache.streampipes.model.schema.EventSchema;
import org.apache.streampipes.sdk.helpers.Tuple2;

public abstract class OutputSchemaGenerator<T extends OutputStrategy> {

  protected T outputStrategy;

  public OutputSchemaGenerator(T outputStrategy) {
    this.outputStrategy = outputStrategy;
  }

  public abstract Tuple2<EventSchema, T> buildFromOneStream(SpDataStream stream);

  public abstract Tuple2<EventSchema, T> buildFromTwoStreams(SpDataStream stream1,
                                                                          SpDataStream stream2);

  public Tuple2<EventSchema, T> makeTuple(EventSchema eventSchema) {
    return new Tuple2<>(eventSchema, outputStrategy);
  }
}
