Inheritance diagram for TWKBReader.ExtendedPrecisionReader:

Collaboration diagram for TWKBReader.ExtendedPrecisionReader:

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Public Member Functions
	ExtendedPrecisionReader (final int precision, final byte extendedDimensions)

Coordinate	readPoint (final DataInput input) throws IOException

Coordinate[]	readPointArray (final DataInput input) throws IOException

Protected Attributes
double	precisionMultiplier

Private Attributes
boolean	hasZ = false

double	zPrecisionMultiplier = 0

boolean	hasM = false

double	mPrecisionMultiplier = 0

Constructor & Destructor Documentation

◆ ExtendedPrecisionReader()

ExtendedPrecisionReader	(	final int	precision,
		final byte	extendedDimensions
	)

                                                                                       {
      super(precision);
      if ((extendedDimensions & 0x1) != 0) {
        hasZ = true;
        zPrecisionMultiplier =
            Math.pow(10, TWKBUtils.zigZagDecode((extendedDimensions >> 2) & 0x7));
      }
      if ((extendedDimensions & 0x2) != 0) {
        hasM = true;
        mPrecisionMultiplier =
            Math.pow(10, TWKBUtils.zigZagDecode((extendedDimensions >> 5) & 0x7));
      }
    }

References TWKBReader.ExtendedPrecisionReader.hasM, TWKBReader.ExtendedPrecisionReader.hasZ, TWKBReader.ExtendedPrecisionReader.mPrecisionMultiplier, TWKBUtils.zigZagDecode(), and TWKBReader.ExtendedPrecisionReader.zPrecisionMultiplier.

Member Function Documentation

◆ readPoint()

Coordinate readPoint ( final DataInput input ) throws IOException

Reimplemented from TWKBReader.PrecisionReader.

                                                                          {
      final Coordinate coordinate = super.readPoint(input);
      if (hasZ) {
        coordinate.setZ(Varint.readSignedVarLong(input) / zPrecisionMultiplier);
      }
      if (hasM) {
        coordinate.setM(Varint.readSignedVarLong(input) / mPrecisionMultiplier);
      }
      return coordinate;
    }

References TWKBReader.ExtendedPrecisionReader.hasM, TWKBReader.ExtendedPrecisionReader.hasZ, TWKBReader.ExtendedPrecisionReader.mPrecisionMultiplier, and TWKBReader.ExtendedPrecisionReader.zPrecisionMultiplier.

◆ readPointArray()

Coordinate [] readPointArray ( final DataInput input ) throws IOException

Reimplemented from TWKBReader.PrecisionReader.

                                                                                 {
      final int numCoordinates = Varint.readUnsignedVarInt(input);
      final Coordinate[] coordinates = new Coordinate[numCoordinates];
      long lastX = 0;
      long lastY = 0;
      long lastZ = 0;
      long lastM = 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);
        if (hasZ) {
          lastZ = Varint.readSignedVarLong(input) + lastZ;
          coordinates[i].setZ((lastZ) / zPrecisionMultiplier);
        }
        if (hasM) {
          lastM = Varint.readSignedVarLong(input) + lastM;
          coordinates[i].setM((lastM) / mPrecisionMultiplier);
        }
      }
      return coordinates;
    }