com.adgear.anoa.Handler2 Maven / Gradle / Ivy

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package com.adgear.anoa;

import java.util.Objects;


/**
 * Functional interface for exception handlers with two extra arguments
 *
 * @param  Metadata type
 */
public interface Handler2 {

  /**
   * Convenience factory method for transforming handlers which map an exception to a single
   * meta-datum.
   *
   * @param mapToMetaDatum exception handler
   * @param             Metadata type
   * @return an instance wrapping the result of {@code mapToMetaDatum} in an array.
   */
  static  /*@NonNull*/ Handler2 of(
      /*@NonNull*/ TriFunction mapToMetaDatum) {
    Objects.requireNonNull(mapToMetaDatum);
    return (t, u, v) -> AnoaHandler.arraySize1(mapToMetaDatum.apply(t, u, v));
  }

  M[] apply(Throwable handled, Object value, Object other);

  /**
   * Functional interface for a function taking three arguments
   *
   * @param  Value type of argument 1
   * @param  Value type of argument 2
   * @param  Value type of argument 3
   * @param  Value type of result
   * @see java.util.function.BiFunction
   */
  interface TriFunction {

    R apply(T handled, U value, V other);
  }

}