// JoinBucketLoaders - joins multiple bucket loaders into a single loader,
// similar to `JoinLoaders`.
func JoinBucketLoaders(loaders ...BucketMetricsLoaderFn) BucketMetricsLoaderFn {
	return func(ctx context.Context, m MetricValues, c *metricsCache, b []string) error {
		for _, loader := range loaders {
			if err := loader(ctx, m, c, b); err != nil {
				return err
			}
		}
		return nil
	}

            if (null == value && implType.isInterface() && configuration.getChildCount() == 0) {
                return null; // nothing to process
            }
            final Object bean = instantiateObject(implType);
            if (null == value) {
                processConfiguration(lookup, bean, loader, configuration, evaluator, listener);
            } else {

     * @see java.lang.ClassLoader#getResources(String)
     */
    public static Iterator<URL> getResources(final ClassLoader loader, final String name) {
        assertArgumentNotNull("loader", loader);
        assertArgumentNotEmpty("name", name);

        try {
            final Enumeration<URL> e = loader.getResources(name);
            return new EnumerationIterator<>(e);
        } catch (final IOException e) {

    CountingLoader loader = new CountingLoader();
    LocalCache<Object, Object> map = makeLocalCache(createCacheBuilder());
    assertEquals(0, loader.getCount());

    Object key = new Object();
    Object value = map.get(key, loader);
    assertEquals(1, loader.getCount());
    assertEquals(value, map.get(key, loader));
    assertEquals(1, loader.getCount());
  }

    CountingLoader loader = new CountingLoader();
    LocalCache<Object, Object> map = makeLocalCache(createCacheBuilder());
    assertEquals(0, loader.getCount());

    Object key = new Object();
    Object value = map.get(key, loader);
    assertEquals(1, loader.getCount());
    assertEquals(value, map.get(key, loader));
    assertEquals(1, loader.getCount());
  }

            ExpressionEvaluator evaluator,
            ClassLoader loader,
            ConfigurationListener listener)
            throws ComponentConfigurationException {
        new EnhancedConfigurationConverter()
                .processConfiguration(
                        converterLookup,
                        component,
                        loader, //
                        configuration,
                        evaluator,

  private final CacheLoader<? super K, V> loader;
  private final RemovalListener<? super K, ? super V> removalListener;
  private final StatsCounter statsCounter;
  private final Ticker ticker;
  private final long expireAfterWrite;
  private final long expireAfterAccess;

  LocalCache(CacheBuilder<? super K, ? super V> builder, CacheLoader<? super K, V> loader) {
    this.loader = loader;
    this.removalListener = builder.removalListener;

     *            リソースの拡張子
     * @param loader
     *            リソースを検索するクラスローダ。{@literal null}であってはいけません
     * @return リソース
     * @see #getResourcePath(String, String)
     */
    public static URL getResourceNoException(final String path, final String extension, final ClassLoader loader) {
        assertArgumentNotNull("loader", loader);

        if (path == null || loader == null) {
            return null;
        }

     */
    @SuppressWarnings("unchecked")
    public static <T> Class<T> forName(final String className, final ClassLoader loader) throws ClassNotFoundRuntimeException {
        assertArgumentNotEmpty("className", className);
        try {
            return (Class<T>) Class.forName(className, true, loader);
        } catch (final ClassNotFoundException e) {
            throw new ClassNotFoundRuntimeException(e);
        }
    }

      try {
        stopwatch.start();
        V previousValue = oldValue.get();
        if (previousValue == null) {
          V newValue = loader.load(key);
          return set(newValue) ? futureValue : Futures.immediateFuture(newValue);
        }
        ListenableFuture<V> newValue = loader.reload(key, previousValue);
        if (newValue == null) {