/*
 * 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.sdk.extensions.euphoria.core.translate.collector;

import java.io.Serializable;
import org.apache.beam.sdk.extensions.euphoria.core.client.io.Collector;
import org.apache.beam.sdk.transforms.DoFn;

/**
 * User specified adaptation of {@link DoFn.ProcessContext } to Euphoria's {@link Collector}.
 *
 * @param <OutputT> type of output
 * @param <ElemT> type of element
 */
public interface CollectorAdapter<InputT, OutputT, ElemT> extends Serializable {

  /**
   * Collect element. Implementations should use {@link DoFn.ProcessContext#output(Object)} to write
   * output elements of type {@code OutputT}.
   *
   * @param ctx process context
   * @param elem element
   */
  void collect(DoFn<InputT, OutputT>.ProcessContext ctx, ElemT elem);
}
