TWKBReader.PrecisionReader Class Reference

Inheritance diagram for TWKBReader.PrecisionReader:

Collaboration diagram for TWKBReader.PrecisionReader:

Public Member Functions
	PrecisionReader (final int precision)
Coordinate	readPoint (final DataInput input) throws IOException
Coordinate[]	readPointArray (final DataInput input) throws IOException

Protected Attributes
double	precisionMultiplier

Constructor & Destructor Documentation

PrecisionReader()

PrecisionReader

(

final int

precision

)

                                               {
     precisionMultiplier = Math.pow(10, precision);
   }

References TWKBReader.PrecisionReader.precisionMultiplier.

Member Function Documentation

readPoint()

Coordinate readPoint

(

final DataInput

input

)

throws IOException

Reimplemented in TWKBReader.ExtendedPrecisionReader.

                                                                         {
     return new Coordinate(
         (Varint.readSignedVarLong(input)) / precisionMultiplier,
         (Varint.readSignedVarLong(input)) / precisionMultiplier);
   }

References TWKBReader.PrecisionReader.precisionMultiplier.

readPointArray()

Coordinate [] readPointArray

(

final DataInput

input

)

throws IOException

Reimplemented in TWKBReader.ExtendedPrecisionReader.

                                                                                {
     final int numCoordinates = Varint.readUnsignedVarInt(input);
     final Coordinate[] coordinates = new Coordinate[numCoordinates];
     long lastX = 0;
     long lastY = 0;
     for (int i = 0; i < numCoordinates; i++) {
       lastX = Varint.readSignedVarLong(input) + lastX;
       lastY = Varint.readSignedVarLong(input) + lastY;
       coordinates[i] =
           new Coordinate((lastX) / precisionMultiplier, (lastY) / precisionMultiplier);
     }
     return coordinates;
   }

References TWKBReader.PrecisionReader.precisionMultiplier.

Member Data Documentation

precisionMultiplier

double precisionMultiplier

protected

Referenced by TWKBReader.PrecisionReader.PrecisionReader(), TWKBReader.PrecisionReader.readPoint(), TWKBReader.PrecisionReader.readPointArray(), and TWKBReader.ExtendedPrecisionReader.readPointArray().