cz.seznam.euphoria.spark.FlatMapTranslator Maven / Gradle / Ivy

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/**
 * Copyright 2016 Seznam.cz, a.s.
 *
 * 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 cz.seznam.euphoria.spark;

import cz.seznam.euphoria.core.client.functional.UnaryFunctor;
import cz.seznam.euphoria.core.client.operator.FlatMap;
import org.apache.spark.api.java.JavaRDD;


class FlatMapTranslator implements SparkOperatorTranslator {

  @Override
  @SuppressWarnings("unchecked")
  public JavaRDD translate(FlatMap operator,
                              SparkExecutorContext context) {

    final JavaRDD input = context.getSingleInput(operator);
    final UnaryFunctor mapper = operator.getFunctor();

    return input.flatMap(new UnaryFunctorWrapper<>((UnaryFunctor) mapper));
  }
}