How to use

EVFormat

in

it.tidalwave.metadata.text

 public EVConverter()
  {
   super(new EVFormat());
  }
}

@Override
@Nonnull
public StringBuffer format (@Nonnegative final long number,
              @Nonnull final StringBuffer result,
              @Nonnull final FieldPosition fieldPosition)
 {
  return format((double)number, result, fieldPosition);
 }

s.append(getFractionText(fractional));

 @Test
 public void parse() 
  throws ParseException
  {
   assertEquals(-1 - 5/6.0, format.parse("-1 5/6 EV"));
   assertEquals(-1 - 2/3.0, format.parse("-1 2/3 EV"));
   assertEquals(-1 - 1/2.0, format.parse("-1 1/2 EV"));
   assertEquals(-1 - 1/3.0, format.parse("-1 1/3 EV"));
   assertEquals(-1 - 1/6.0, format.parse("-1 1/6 EV"));
   assertEquals(-1.0,       format.parse("-1 EV"));
   assertEquals(-5/6.0,     format.parse("-5/6 EV"));
   assertEquals(-2/3.0,     format.parse("-2/3 EV"));
   assertEquals(-1/2.0,     format.parse("-1/2 EV"));
   assertEquals(-1/3.0,     format.parse("-1/3 EV"));
   assertEquals(-1/6.0,     format.parse("-1/6 EV"));
   assertEquals(0.0,        format.parse("0 EV"));
   assertEquals(+1/6.0,     format.parse("+1/6 EV"));
   assertEquals(+1/3.0,     format.parse("+1/3 EV"));
   assertEquals(+1/2.0,     format.parse("+1/2 EV"));
   assertEquals(+2/3.0,     format.parse("+2/3 EV"));
   assertEquals(+5/6.0,     format.parse("+5/6 EV"));
   assertEquals(+1.0,       format.parse("+1 EV"));
   assertEquals(+1 + 1/6.0, format.parse("+1 1/6 EV"));
   assertEquals(+1 + 1/3.0, format.parse("+1 1/3 EV"));
   assertEquals(+1 + 1/2.0, format.parse("+1 1/2 EV"));
   assertEquals(+1 + 2/3.0, format.parse("+1 2/3 EV"));
   assertEquals(+1 + 5/6.0, format.parse("+1 5/6 EV"));
  }
}

@Before
public void setupFixture()
 {
  format = new EVFormat();
  formatUnicode = new EVFormat(EVFormat.Fractions.UNICODE);
 }  

@Test
public void testFormat() 
 {
  assertEquals("-1 5/6 EV", format.format(-1 - 5/6.0));
  assertEquals("-1 2/3 EV", format.format(-1 - 2/3.0));
  assertEquals("-1 1/2 EV", format.format(-1 - 1/2.0));
  assertEquals("-1 1/3 EV", format.format(-1 - 1/3.0));
  assertEquals("-1 1/6 EV", format.format(-1 - 1/6.0));
  assertEquals("-1 EV", format.format(-1.0));
  assertEquals("-5/6 EV", format.format(-5/6.0));
  assertEquals("-2/3 EV", format.format(-2/3.0));
  assertEquals("-1/2 EV", format.format(-1/2.0));
  assertEquals("-1/3 EV", format.format(-1/3.0));
  assertEquals("-1/6 EV", format.format(-1/6.0));
  assertEquals("0 EV", format.format(0.0));
  assertEquals("+1/6 EV", format.format(1/6.0));
  assertEquals("+1/3 EV", format.format(1/3.0));
  assertEquals("+1/2 EV", format.format(1/2.0));
  assertEquals("+2/3 EV", format.format(2/3.0));
  assertEquals("+5/6 EV", format.format(5/6.0));
  assertEquals("+1 EV", format.format(1.0));
  assertEquals("+1 1/6 EV", format.format(1 + 1/6.0));
  assertEquals("+1 1/3 EV", format.format(1 + 1/3.0));
  assertEquals("+1 1/2 EV", format.format(1 + 1/2.0));
  assertEquals("+1 2/3 EV", format.format(1 + 2/3.0));
  assertEquals("+1 5/6 EV", format.format(1 + 5/6.0));
 }

 public TIFFFormatProviderSupport (@Nonnull final Class<Item> itemClass,
                  @Nonnull final String displayName)
  {
   super(itemClass, displayName);
   
   // TODO: move to a configuration file?
   formatMap.put("apertureValue",       new APEXApertureFormat());
   formatMap.put("maxApertureValue",    new APEXApertureFormat());
   formatMap.put("exposureBiasValue",   new EVFormat(EVFormat.Fractions.UNICODE));
   formatMap.put("exposureTime",        new ShutterFormat());
   formatMap.put("FNumber",             new ApertureFormat(ApertureFormat.F.UNICODE));
   formatMap.put("ISOSpeedRatings",     new ISOFormat());
   formatMap.put("focalLength",         new FocalFormat());
   formatMap.put("focalLength35mmFilm", new FocalFormat());
   formatMap.put("shutterSpeedValue",   new APEXShutterFormat());
   formatMap.put("EXIFCFAPattern",      new CFAPatternFormat());
   formatMap.put("EXIFVersion",         new DeweyFormat());
   formatMap.put("DNGBackwardVersion",  new DeweyFormat());
   formatMap.put("DNGVersion",          new DeweyFormat());
   formatMap.put("TIFF_EPStandardID",   new DeweyFormat());
   formatMap.put("flashPixVersion",     new DeweyFormat());
   formatMap.put("flash",               new EXIFFlashFormat());
  }
}

@Test
public void testFormatWithUnicode() 
 {
  assertEquals("-1 \u215A EV", formatUnicode.format(-1 - 5/6.0));
  assertEquals("-1 \u2154 EV", formatUnicode.format(-1 - 2/3.0));
  assertEquals("-1 \u00bd EV", formatUnicode.format(-1 - 1/2.0));
  assertEquals("-1 \u2153 EV", formatUnicode.format(-1 - 1/3.0));
  assertEquals("-1 \u2159 EV", formatUnicode.format(-1 - 1/6.0));
  assertEquals("-1 EV", formatUnicode.format(-1.0));
  assertEquals("-\u215A EV", formatUnicode.format(-5/6.0));
  assertEquals("-\u2154 EV", formatUnicode.format(-2/3.0));
  assertEquals("-\u00bd EV", formatUnicode.format(-1/2.0));
  assertEquals("-\u2153 EV", formatUnicode.format(-1/3.0));
  assertEquals("-\u2159 EV", formatUnicode.format(-1/6.0));
  assertEquals("0 EV", formatUnicode.format(0.0));
  assertEquals("+\u2159 EV", formatUnicode.format(1/6.0));
  assertEquals("+\u2153 EV", formatUnicode.format(1/3.0));
  assertEquals("+\u00bd EV", formatUnicode.format(1/2.0));
  assertEquals("+\u2154 EV", formatUnicode.format(2/3.0));
  assertEquals("+\u215A EV", formatUnicode.format(5/6.0));
  assertEquals("+1 EV", formatUnicode.format(1.0));
  assertEquals("+1 \u2159 EV", formatUnicode.format(1 + 1/6.0));
  assertEquals("+1 \u2153 EV", formatUnicode.format(1 + 1/3.0));
  assertEquals("+1 \u00bd EV", formatUnicode.format(1 + 1/2.0));
  assertEquals("+1 \u2154 EV", formatUnicode.format(1 + 2/3.0));
  assertEquals("+1 \u215A EV", formatUnicode.format(1 + 5/6.0));
 }