Method get

output/java_guava/1.4.19/MapMaker.java:407–422

(Object key)

    }

    @SuppressWarnings("unchecked") // unsafe, which is one advantage of Cache over Map
    @Override
    public V get(Object key) {
      V value;
      try {
        value = getOrCompute((K) key);
      } catch (ExecutionException e) {
        Throwable cause = e.getCause();
        Throwables.propagateIfInstanceOf(cause, ComputationException.class);
        throw new ComputationException(cause);
      }
      if (value == null) {
        throw new NullPointerException(computingFunction + " returned null for key " + key + ".");
      }
      return value;
    }
  }
}