*/
    @Test
    public void testIsTarget() throws Exception {
        final SqlDateConverter converter = new SqlDateConverter("yyyy/MM/dd");
        assertThat(converter.isTarget(java.sql.Date.class), is(true));
        assertThat(converter.isTarget(java.util.Date.class), is(not(true)));
    }

     */
    @Test
    public void testIsTarget() throws Exception {
        final DateConverter converter = new DateConverter("yyyy/MM/dd");
        assertThat(converter.isTarget(Date.class), is(true));
        assertThat(converter.isTarget(Timestamp.class), is(not(true)));
    }

     * @throws Exception
     */
    public void testIsTarget() throws Exception {
        final TimeConverter converter = new TimeConverter("yyyy/MM/dd");
        assertThat(converter.isTarget(java.sql.Time.class), is(true));
        assertThat(converter.isTarget(java.util.Date.class), is(not(true)));
    }

     */
    @Test
    public void testIsTarget() throws Exception {
        final TimestampConverter converter = new TimestampConverter("yyyy/MM/dd");
        assertThat(converter.isTarget(java.sql.Timestamp.class), is(true));
        assertThat(converter.isTarget(java.util.Date.class), is(not(true)));
    }

     */
    @Test
    public void testIsTarget() throws Exception {
        final NumberConverter converter = new NumberConverter("##0");
        assertThat(converter.isTarget(Integer.class), is(true));
        assertThat(converter.isTarget(Timestamp.class), is(not(true)));
    }

    /**
     * このコンバータの変換対象なら{@literal true}を返します。
     *
     * @param clazz
     *            型。{@literal null}であってはいけません
     * @return このコンバータの変換対象なら{@literal true}
     */
    boolean isTarget(Class<?> clazz);

    public String getAsString(final Object value) {
        if (value == null) {
            return null;
        }
        return new DecimalFormat(pattern).format(value);
    }

    @Override
    public boolean isTarget(final Class<?> clazz) {
        assertArgumentNotNull("clazz", clazz);
        return Number.class.isAssignableFrom(clazz);
    }

        if (value == null) {
            return null;
        }
        return StringConversionUtil.toString((Date) value, pattern);
    }

    @Override
    public boolean isTarget(final Class<?> clazz) {
        assertArgumentNotNull("clazz", clazz);
        return clazz == Date.class;
    }

        if (value == null) {
            return null;
        }
        return StringConversionUtil.toString((Date) value, pattern);
    }

    @Override
    public boolean isTarget(final Class<?> clazz) {
        assertArgumentNotNull("clazz", clazz);
        return clazz == java.sql.Date.class;
    }

        if (value == null) {
            return null;
        }
        return StringConversionUtil.toString((Date) value, pattern);
    }

    @Override
    public boolean isTarget(final Class<?> clazz) {
        assertArgumentNotNull("clazz", clazz);
        return clazz == java.sql.Timestamp.class;
    }