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Guava cache supplier extension to memoize exceptions, fallback, expiration control.

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package com.zeroleak.throwingsupplier;

import java8.util.Optional;
import java8.util.function.Supplier;

public class Throwing extends Either {

  public Throwing(T value) {
    super(value);
  }

  public Throwing(Exception e) {
    super((Optional) Optional.empty(), (E) e);
  }

  public T getOrThrow() throws Exception {
    return getValue()
        .orElseThrow(
            new Supplier() {
              @Override
              public Exception get() {
                return getFallback().get();
              }
            });
  }
}