* {@link org.codelibs.core.lang.ObjectUtil#defaultValue(Object, Object)} .
     */
    @Test
    public void testDefaultValue() {
        final Hoge hoge = new Hoge();
        assertSame(ObjectUtil.defaultValue(null, hoge), hoge);
        assertSame(ObjectUtil.defaultValue(hoge, null), hoge);
        assertSame(ObjectUtil.defaultValue(hoge, hoge), hoge);
        assertSame(ObjectUtil.defaultValue(null, null), null);

    assertEquals(false, Defaults.defaultValue(boolean.class).booleanValue());
    assertEquals('\0', Defaults.defaultValue(char.class).charValue());
    assertEquals(0, Defaults.defaultValue(byte.class).byteValue());
    assertEquals(0, Defaults.defaultValue(short.class).shortValue());
    assertEquals(0, Defaults.defaultValue(int.class).intValue());
    assertEquals(0, Defaults.defaultValue(long.class).longValue());

   * @return function that returns {@code map.get(a)} when {@code a} is a key, or {@code
   *     defaultValue} otherwise
   */
  public static <K extends @Nullable Object, V extends @Nullable Object> Function<K, V> forMap(
      Map<K, ? extends V> map, @ParametricNullness V defaultValue) {
    return new ForMapWithDefault<>(map, defaultValue);
  }

          <description></description>
          <type>boolean</type>
          <defaultValue>false</defaultValue>
        </field>
        <field>
          <name>inheritedByDefault</name>
          <version>1.0.0+</version>
          <description></description>
          <type>boolean</type>
          <defaultValue>true</defaultValue>
        </field>
        <field>
          <name>requiredJavaVersion</name>

    }

    /**
     * オブジェクトを返します。オブジェクトが<code>null</code>だったら<code>defaultValue</code>を返します。
     * <p>
     * 次のように使います．
     * </p>
     *
     * <pre>
     * ObjectUtil.defaultValue(null, "NULL")  = "NULL"
     * ObjectUtil.defaultValue(null, 1)    = 1
     * ObjectUtil.defaultValue(Boolean.TRUE, true) = Boolean.TRUE
     * ObjectUtil.defaultValue(null, null) = null
     * </pre>
     *
     * @param <T>

        if (StringUtil.isBlank(filetype)) {
            return defaultValue;
        }
        return filetype;
    }

    public String getDefaultValue() {
        return defaultValue;
    }

    public void setDefaultValue(final String defaultValue) {
        this.defaultValue = defaultValue;
    }

    public String[] getTypes() {

          <type>String</type>
          <defaultValue>default</defaultValue>
          <description>The layout of the mirror repository.
            @since Maven 3.</description>
        </field>
        <field>
          <name>mirrorOfLayouts</name>
          <version>1.1.0+</version>
          <type>String</type>
          <defaultValue>default,legacy</defaultValue>
          <description>

    assertEquals(false, Defaults.defaultValue(boolean.class).booleanValue());
    assertEquals('\0', Defaults.defaultValue(char.class).charValue());
    assertEquals(0, Defaults.defaultValue(byte.class).byteValue());
    assertEquals(0, Defaults.defaultValue(short.class).shortValue());
    assertEquals(0, Defaults.defaultValue(int.class).intValue());
    assertEquals(0, Defaults.defaultValue(long.class).longValue());

   * @return function that returns {@code map.get(a)} when {@code a} is a key, or {@code
   *     defaultValue} otherwise
   */
  public static <K extends @Nullable Object, V extends @Nullable Object> Function<K, V> forMap(
      Map<K, ? extends V> map, @ParametricNullness V defaultValue) {
    return new ForMapWithDefault<>(map, defaultValue);
  }

    tag: Long,
  ): BasicDerAdapter<T> = copy(tagClass = tagClass, tag = tag)

  /** Returns a copy of this adapter that doesn't encode values equal to [defaultValue]. */
  fun optional(defaultValue: T? = null): BasicDerAdapter<T> = copy(isOptional = true, defaultValue = defaultValue)

  /**
   * Returns a copy of this adapter that sets the encoded or decoded value as the type hint for the
   * other adapters on this SEQUENCE to interrogate.