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);
   }

Member Function Documentation

readPoint()

Coordinate readPoint

(

final DataInput

input

)

throws IOException

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

readPointArray()

Coordinate [] readPointArray

(

final DataInput

input

)

throws IOException

                                                                                {
     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;
   }

Member Data Documentation

precisionMultiplier

double precisionMultiplier

protected