Examples of com.drew.lang.Rational.doubleValue()

com.drew.lang.Rational.doubleValue()
Returns the value of the specified number as a double. This may involve rounding. @return the numeric value represented by this object after conversionto type double.

    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()));
    }


    public void testToString() throws Exception
    {
        Rational rational = new Rational(1, 3);

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        if (!_directory.containsTag(ExifDirectory.TAG_DIGITAL_ZOOM_RATIO)) return null;
        Rational rational = _directory.getRational(ExifDirectory.TAG_DIGITAL_ZOOM_RATIO);
        if (rational.getNumerator()==0)
            return "Digital zoom not used.";


        return SimpleDecimalFormatter.format(rational.doubleValue());
    }


    public String getWhiteBalanceModeDescription() throws MetadataException
    {
        if (!_directory.containsTag(ExifDirectory.TAG_WHITE_BALANCE_MODE)) return null;

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    public String getFocalLengthDescription() throws MetadataException
    {
        if (!_directory.containsTag(ExifDirectory.TAG_FOCAL_LENGTH)) return null;
        java.text.DecimalFormat formatter = new DecimalFormat("0.0##");
        Rational focalLength = _directory.getRational(ExifDirectory.TAG_FOCAL_LENGTH);
        return formatter.format(focalLength.doubleValue()) + " mm";
    }


    public String getFlashDescription() throws MetadataException
    {
        if (!_directory.containsTag(ExifDirectory.TAG_FLASH)) return null;

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    public String getSubjectDistanceDescription() throws MetadataException
    {
        if (!_directory.containsTag(ExifDirectory.TAG_SUBJECT_DISTANCE)) return null;
        Rational distance = _directory.getRational(ExifDirectory.TAG_SUBJECT_DISTANCE);
        java.text.DecimalFormat formatter = new DecimalFormat("0.0##");
        return formatter.format(distance.doubleValue()) + " metres";
    }


    public String getCompressionLevelDescription() throws MetadataException
    {
        if (!_directory.containsTag(ExifDirectory.TAG_COMPRESSION_LEVEL)) return null;

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    public String getFNumberDescription() throws MetadataException
    {
        if (!_directory.containsTag(ExifDirectory.TAG_FNUMBER)) return null;
        Rational fNumber = _directory.getRational(ExifDirectory.TAG_FNUMBER);
        return "F" + SimpleDecimalFormatter.format(fNumber.doubleValue());
    }


    public String getYCbCrPositioningDescription() throws MetadataException
    {
        if (!_directory.containsTag(ExifDirectory.TAG_YCBCR_POSITIONING)) return null;

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     */
    public static Double readDirection(GpsDirectory dirGps) {
        if (dirGps != null) {
            Rational direction = dirGps.getRational(GpsDirectory.TAG_GPS_IMG_DIRECTION);
            if (direction != null) {
                return direction.doubleValue();
            }
        }
        return null;
    }

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                    attributes.add(new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_GEO_LONGITUDE.getTypeID(), ExifParserModuleFactory.getModuleName(), longitude));
                }


                Rational altitude = gpsDir.getRational(GpsDirectory.TAG_GPS_ALTITUDE);
                if (altitude != null) {
                    attributes.add(new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_GEO_ALTITUDE.getTypeID(), ExifParserModuleFactory.getModuleName(), altitude.doubleValue()));
                }
            }


            // Device info
            ExifIFD0Directory devDir = metadata.getDirectory(ExifIFD0Directory.class);

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