func (i osMetric) String() string {
	if i >= osMetric(len(_osMetric_index)-1) {
		return "osMetric(" + strconv.FormatInt(int64(i), 10) + ")"
	}
	return _osMetric_name[_osMetric_index[i]:_osMetric_index[i+1]]

        return null;
    }

    /**
     * パッケージ名をディレクトリ名に変換して返します。
     *
     * @param packageName
     *            パッケージ名
     * @return ディレクトリ名
     */
    protected static String toDirectoryName(final String packageName) {
        if (StringUtil.isEmpty(packageName)) {
            return null;
        }
        return packageName.replace('.', '/') + '/';
    }

 */
fun alpnBootVersion(): String? {
  val version = System.getProperty("alpn.boot.version")

  if (version != null) {
    return version
  }

  val javaVersion = System.getProperty("java.version")
  val match = "1\\.8\\.0_(\\d+)(-.*)?".toRegex().find(javaVersion) ?: return null

  return alpnBootVersionForPatchVersion(match.groupValues.first().toInt())

  @Override
  public SampleElements<Character> samples() {
    return new Chars();
  }

  @Override
  public List<Character> create(Object... elements) {
    Character[] array = new Character[elements.length];
    int i = 0;
    for (Object e : elements) {
      array[i++] = (Character) e;
    }
    return create(array);
  }

  /**

  @Override
  public SampleElements<UnhashableObject> samples() {
    return new Unhashables();
  }

  @Override
  public T create(Object... elements) {
    UnhashableObject[] array = createArray(elements.length);
    int i = 0;
    for (Object e : elements) {
      array[i++] = (UnhashableObject) e;
    }
    return create(array);
  }

  /**

            @Override
            public LongAddable get() {
              return new LongAdder();
            }
          };
    } catch (Throwable t) { // we really want to catch *everything*
      supplier =
          new Supplier<LongAddable>() {
            @Override
            public LongAddable get() {
              return new PureJavaLongAddable();
            }
          };
    }
    SUPPLIER = supplier;

        this.type = type;
        this.raw = raw;
    }


    /**
     * @return the type
     */
    public final int getType () {
        return this.type;
    }


    /**
     * @return the raw
     */
    public final byte[] getRaw () {
        return this.raw;
    }

import org.lastaflute.web.response.render.RenderData;

public class RenderDataUtil {

    public static void register(final RenderData data, final String key, final Object value) {
        if (value == null) {
            return;
        }

        if (value instanceof Entity) {
            data.register(key, BeanUtil.copyBeanToNewMap(value));
        } else {
            if (value instanceof final Collection<?> coll && !coll.isEmpty()) {

        if (file != null) {
            Files.delete(file.toPath());
        }
    }

    public InputStream getInputStream() throws IOException {
        if (file != null) {
            return new FileInputStream(file);
        }
        return new ByteArrayInputStream(data);
    }

     *
     * @param conn
     *            {@link JarURLConnection}。{@literal null}であってはいけません
     * @return {@link JarFile}
     */
    public static JarFile getJarFile(final JarURLConnection conn) {
        assertArgumentNotNull("conn", conn);

        try {
            return conn.getJarFile();
        } catch (final IOException e) {
            throw new IORuntimeException(e);
        }
    }