de.gerdiproject.json.geo.adapters

Class AbstractGeometryAdapter<T extends com.vividsolutions.jts.geom.Geometry>

java.lang.Object

de.gerdiproject.json.geo.adapters.AbstractGeometryAdapter<T>

All Implemented Interfaces:

com.google.gson.JsonDeserializer<T>, com.google.gson.JsonSerializer<T>

Direct Known Subclasses:

LineStringAdapter, MultiLineStringAdapter, MultiPointAdapter, MultiPolygonAdapter, PointAdapter, PolygonAdapter

public abstract class AbstractGeometryAdapter<T extends com.vividsolutions.jts.geom.Geometry>
extends Object
implements com.google.gson.JsonSerializer<T>, com.google.gson.JsonDeserializer<T>

This class offers generic JSON serialization logic for Geometrys. It is required in order to fix issues that cause serialized Geometry objects to disregard their respective PrecisionModel, and deserialized Geometry to throw an exception if the coordinate arrays are empty.

Author:

Robin Weiss

Constructor Summary

Constructors

Constructor and Description
AbstractGeometryAdapter(com.vividsolutions.jts.geom.GeometryFactory geoFactory) Simple Constructor.
AbstractGeometryAdapter(String geometryType, double decimalFactor, com.vividsolutions.jts.geom.GeometryFactory geoFactory)

Method Summary

Modifier and Type	Method and Description
protected com.google.gson.JsonArray	coordinatesToJsonArray(com.vividsolutions.jts.geom.Coordinate... coordinates) Converts an array of Coordinates to a JsonArray.
protected com.google.gson.JsonArray	coordinateToJsonArray(com.vividsolutions.jts.geom.Coordinate coordinate) Converts a single Coordinate to a JsonArray.
T	deserialize(com.google.gson.JsonElement json, Type typeOfT, com.google.gson.JsonDeserializationContext context)
protected abstract T	deserializeGeometry(com.google.gson.JsonArray coordinates, com.vividsolutions.jts.geom.GeometryFactory factory) Creates a Geometry object by deserializing its Coordinates JsonArray.
protected com.vividsolutions.jts.geom.Coordinate	jsonArrayToCoordinate(com.google.gson.JsonArray jsonArray) Creates a single Coordinate out of a JsonArray.
protected com.vividsolutions.jts.geom.Coordinate[]	jsonArrayToCoordinates(com.google.gson.JsonArray jsonArray) Creates an array of Coordinates out of a JsonArray.
com.google.gson.JsonElement	serialize(T src, Type typeOfSrc, com.google.gson.JsonSerializationContext context)
protected abstract com.google.gson.JsonArray	serializeCoordinates(T src) Serializes the Coordinates of a Geometry to a JsonArray.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractGeometryAdapter

public AbstractGeometryAdapter(com.vividsolutions.jts.geom.GeometryFactory geoFactory)

Simple Constructor.

Parameters:

geoFactory - the GeometryFactory used to create deserialized objects

AbstractGeometryAdapter

public AbstractGeometryAdapter(String geometryType,
                               double decimalFactor,
                               com.vividsolutions.jts.geom.GeometryFactory geoFactory)

Method Detail

serialize

public com.google.gson.JsonElement serialize(T src,
                                             Type typeOfSrc,
                                             com.google.gson.JsonSerializationContext context)

Specified by:

serialize in interface com.google.gson.JsonSerializer<T extends com.vividsolutions.jts.geom.Geometry>

deserialize

public T deserialize(com.google.gson.JsonElement json,
                     Type typeOfT,
                     com.google.gson.JsonDeserializationContext context)
              throws com.google.gson.JsonParseException

Specified by:

deserialize in interface com.google.gson.JsonDeserializer<T extends com.vividsolutions.jts.geom.Geometry>

Throws:

com.google.gson.JsonParseException

deserializeGeometry

protected abstract T deserializeGeometry(com.google.gson.JsonArray coordinates,
                                         com.vividsolutions.jts.geom.GeometryFactory factory)

Creates a Geometry object by deserializing its Coordinates JsonArray.

Parameters:

coordinates - a JsonArray of Coordinates

factory - the GeometryFactory used for building the output

Returns:

a Geometry object represented by its JSON representation

serializeCoordinates

protected abstract com.google.gson.JsonArray serializeCoordinates(T src)

Serializes the Coordinates of a Geometry to a JsonArray.

Parameters:

src - a Geometry the Coordinates of which are to be serialized

Returns:

a JsonArray of Coordinates

coordinatesToJsonArray

protected com.google.gson.JsonArray coordinatesToJsonArray(com.vividsolutions.jts.geom.Coordinate... coordinates)

Converts an array of Coordinates to a JsonArray.

Parameters:

coordinates - the Coordinates which are to be serialized

Returns:

a JsonArray of Coordinates

coordinateToJsonArray

protected com.google.gson.JsonArray coordinateToJsonArray(com.vividsolutions.jts.geom.Coordinate coordinate)

Converts a single Coordinate to a JsonArray.

Parameters:

coordinate - the Coordinate which is to be serialized

Returns:

a JsonArray that contains Double values

jsonArrayToCoordinate

protected com.vividsolutions.jts.geom.Coordinate jsonArrayToCoordinate(com.google.gson.JsonArray jsonArray)

Creates a single Coordinate out of a JsonArray.

Parameters:

jsonArray - the JsonArray that is to be parsed

Returns:

a single Coordinate

jsonArrayToCoordinates

protected com.vividsolutions.jts.geom.Coordinate[] jsonArrayToCoordinates(com.google.gson.JsonArray jsonArray)

Creates an array of Coordinates out of a JsonArray.

Parameters:

jsonArray - the JsonArray that is to be parsed

Returns:

an array of Coordinates