memoization-guava/src/main/java/de/xn__ho_hia/memoization/guava/GuavaCacheBasedLongSupplierMemoizer.java

   1 /*
   2  * This file is part of memoization.java. It is subject to the license terms in the LICENSE file found in the top-level
   3  * directory of this distribution and at http://creativecommons.org/publicdomain/zero/1.0/. No part of memoization.java,
   4  * including this file, may be copied, modified, propagated, or distributed except according to the terms contained
   5  * in the LICENSE file.
   6  */
   7 package de.xn__ho_hia.memoization.guava;
   8
   9 import java.util.function.LongSupplier;
  10 import java.util.function.Supplier;
  11
  12 import com.google.common.cache.Cache;
  13
  14 final class GuavaCacheBasedLongSupplierMemoizer<KEY>
  15         extends AbstractGuavaCacheBasedMemoizer<KEY, Long>
  16         implements LongSupplier {
  17
  18     private final Supplier<KEY> keySupplier;
  19     private final LongSupplier  supplier;
  20
  21     GuavaCacheBasedLongSupplierMemoizer(
  22             final Cache<KEY, Long> cache,
  23             final Supplier<KEY> keySupplier,
  24             final LongSupplier supplier) {
  25         super(cache);
  26         this.keySupplier = keySupplier;
  27         this.supplier = supplier;
  28     }
  29
  30     @Override
  31     public long getAsLong() {
  32         return get(keySupplier.get(), givenKey -> Long.valueOf(supplier.getAsLong())).longValue();
  33     }
  34
  35 }