Package com.drew.lang

Examples of com.drew.lang.Rational

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        super(s);
    }

    public void testCreateRational() throws Exception
    {
        Rational rational = new Rational(1, 3);
        assertEquals(1, rational.getNumerator());
        assertEquals(3, rational.getDenominator());
        assertEquals(new Double(1d / 3d), new Double(rational.doubleValue()));
    }
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        assertEquals(new Double(1d / 3d), new Double(rational.doubleValue()));
    }

    public void testToString() throws Exception
    {
        Rational rational = new Rational(1, 3);
        assertEquals("1/3", rational.toString());
    }
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        assertEquals("1/3", rational.toString());
    }

    public void testToSimpleString() throws Exception
    {
        Rational third1 = new Rational(1, 3);
        Rational third2 = new Rational(2, 6);
        assertEquals("1/3", third1.toSimpleString(true));
        assertEquals("1/3", third2.toSimpleString(true));
        assertEquals(third1, third2);

        Rational twoThirds = new Rational(10, 15);
        assertEquals("2/3", twoThirds.toSimpleString(true));

        Rational two = new Rational(10, 5);
        assertTrue(two.isInteger());
        assertEquals("2", two.toSimpleString(true));
        assertEquals("2", two.toSimpleString(false));

        Rational twoFifths = new Rational(4, 10);
        assertEquals("0.4", twoFifths.toSimpleString(true));
        assertEquals("2/5", twoFifths.toSimpleString(false));

        Rational threeEigths = new Rational(3, 8);
        assertEquals("3/8", threeEigths.toSimpleString(true));

        Rational zero = new Rational(0, 8);
        assertTrue(zero.isInteger());
        assertEquals("0", zero.toSimpleString(true));
        assertEquals("0", zero.toSimpleString(false));

        zero = new Rational(0, 0);
        assertTrue(zero.isInteger());
        assertEquals("0", zero.toSimpleString(true));
        assertEquals("0", zero.toSimpleString(false));

        // not sure this is a nice presentation of rationals.  won't implement it for now.
//        Rational twoAndAHalf = new Rational(10,4);
//        assertEquals("2 1/2", twoAndAHalf.toSimpleString());
    }
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//        assertEquals("2 1/2", twoAndAHalf.toSimpleString());
    }

    public void testGetReciprocal() throws Exception
    {
        Rational rational = new Rational(1, 3);
        Rational reciprocal = rational.getReciprocal();
        assertEquals("new rational should be reciprocal", new Rational(3, 1), reciprocal);
        assertEquals("origianl reciprocal should remain unchanged", new Rational(1, 3), rational);
    }
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    {
        if (bytes.length==3)
        {
            byte denominator = bytes[2];
            int numerator = (int)bytes[0] * bytes[1];
            return new Rational(numerator, denominator);
        }
        return null;
    }
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    }

    public String getDigitalZoomDescription() throws MetadataException
    {
        if (!_directory.containsTag(NikonType2MakernoteDirectory.TAG_NIKON_TYPE2_DIGITAL_ZOOM)) return null;
        Rational rational = _directory.getRational(NikonType2MakernoteDirectory.TAG_NIKON_TYPE2_DIGITAL_ZOOM);
        if (rational.intValue() == 1) {
            return "No digital zoom";
        }
        return rational.toSimpleString(true) + "x digital zoom";
    }
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        return "ISO " + values[1];
    }

    public String getAutoFlashCompensationDescription() throws MetadataException
    {
        Rational ev = getMakernoteDirectory().getAutoFlashCompensation();

        if (ev==null)
            return "Unknown";

        DecimalFormat decimalFormat = new DecimalFormat("0.##");
        return decimalFormat.format(ev.floatValue()) + " EV";
    }
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                }
*/
                break;
            case FMT_SRATIONAL:
                if (componentCount == 1) {
                    directory.setRational(tagType, new Rational(reader.getInt32(tagValueOffset), reader.getInt32(tagValueOffset + 4)));
                } else if (componentCount > 1) {
                    Rational[] rationals = new Rational[componentCount];
                    for (int i = 0; i < componentCount; i++)
                        rationals[i] = new Rational(reader.getInt32(tagValueOffset + (8 * i)), reader.getInt32(tagValueOffset + 4 + (8 * i)));
                    directory.setRationalArray(tagType, rationals);
                }
                break;
            case FMT_URATIONAL:
                if (componentCount == 1) {
                    directory.setRational(tagType, new Rational(reader.getUInt32(tagValueOffset), reader.getUInt32(tagValueOffset + 4)));
                } else if (componentCount > 1) {
                    Rational[] rationals = new Rational[componentCount];
                    for (int i = 0; i < componentCount; i++)
                        rationals[i] = new Rational(reader.getUInt32(tagValueOffset + (8 * i)), reader.getUInt32(tagValueOffset + 4 + (8 * i)));
                    directory.setRationalArray(tagType, rationals);
                }
                break;
            case FMT_SINGLE:
                if (componentCount == 1) {
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            return null;

        if (o instanceof Rational)
            return (Rational)o;
        if (o instanceof Integer)
            return new Rational((Integer)o, 1);
        if (o instanceof Long)
            return new Rational((Long)o, 1);

        // NOTE not doing conversions for real number types

        return null;
    }
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    }

    @Nullable
    public String getDigitalZoomRatioDescription()
    {
        Rational value = _directory.getRational(ExifSubIFDDirectory.TAG_DIGITAL_ZOOM_RATIO);
        if (value==null)
            return null;
        if (value.getNumerator()==0)
            return "Digital zoom not used.";
        return SimpleDecimalFormatter.format(value.doubleValue());
    }
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Related Classes of com.drew.lang.Rational

  • com.drew.imaging.tiff.TiffReader
  • com.drew.lang.test.RationalTest
  • com.drew.metadata.Directory
  • com.drew.metadata.DirectoryTest
  • com.drew.metadata.exif.ExifDescriptor
  • com.drew.metadata.exif.ExifIFD0Descriptor
  • com.drew.metadata.exif.ExifIFD0DescriptorTest
  • com.drew.metadata.exif.ExifReader
  • com.drew.metadata.exif.ExifReaderTest
  • com.drew.metadata.exif.ExifSubIFDDescriptor
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