net.studioblueplanet.generics

Class PolyLineEncoder

java.lang.Object

net.studioblueplanet.generics.PolyLineEncoder

public class PolyLineEncoder
extends Object

This class implements the Google Maps polyline encoding Usage: encoder=PolyLineEncoder.getInstance(); encoder.resetPointEncoding(); String encodedString=""; encodeString+=encoder.encodePoint(point1); encodeString+=encoder.encodePoint(point2); encodeString+=encoder.encodePoint(point3); ...

Author:

Jorgen

Constructor Summary

Constructors

Constructor and Description
PolyLineEncoder()

Method Summary

Modifier and Type	Method and Description
String	encodePoint(double lat, double lon) This method encodes a point according the Google encoded polyline method.
String	encodeValue(double value) This method converts doubles to the Google encoded string format
static PolyLineEncoder	getInstance() Returns the one and only instance of this Singleton class
void	resetPointEncoding() This method resets the Google polyline encoding.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PolyLineEncoder

public PolyLineEncoder()

Method Detail

getInstance

public static PolyLineEncoder getInstance()

Returns the one and only instance of this Singleton class

Returns:

The instance

resetPointEncoding

public void resetPointEncoding()

This method resets the Google polyline encoding. Basically it sets the 1st point to null, indicating that the first point must be encoded fully (for subsequent points only the delta will be encoded)

encodePoint

public String encodePoint(double lat,
                          double lon)

This method encodes a point according the Google encoded polyline method.

Parameters:

lat - The latitude of the point to encode

lon - The longitude of the point to encode

Returns:

String representing the encoded point (or delta with respect to previous point if it is not the 1st point)

encodeValue

public String encodeValue(double value)

This method converts doubles to the Google encoded string format

Parameters:

value - Value to convert

Returns:

Encoded string part