Java Code Examples for org.apache.spark.api.java.function.PairFunction#call()

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Example 1
Source File: SparkFrontendUtils.java    From incubator-nemo with Apache License 2.0 5 votes vote down vote up 
/**
 * Converts a {@link PairFunction} to a plain map {@link Function}.
 *
 * @param pairFunction the pair function to convert.
 * @param <T>          the type of original element.
 * @param <K>          the type of converted key.
 * @param <V>          the type of converted value.
 * @return the converted map function.
 */
public static <T, K, V> Function<T, Tuple2<K, V>> pairFunctionToPlainFunction(
  final PairFunction<T, K, V> pairFunction) {
  return new Function<T, Tuple2<K, V>>() {
    @Override
    public Tuple2<K, V> call(final T elem) throws Exception {
      return pairFunction.call(elem);
    }
  };
}