Support for geolatte 1.0.x

[aVolpe]

The current code doesn't work well with geolatte 1.0.x, I don't know how many changes are required to make it works, but I will try to add a bit.

This is a PolygonSerializer that works well with the current jackson.

import java.io.IOException;

import org.geolatte.common.dataformats.json.jackson.JsonMapper;
import org.geolatte.common.dataformats.json.jackson.PolygonSerializer;
import org.geolatte.geom.C2D;
import org.geolatte.geom.Envelope;
import org.geolatte.geom.LineString;
import org.geolatte.geom.Polygon;
import org.geolatte.geom.Position;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

public class PolygonToGeoJSON extends PolygonSerializer {

    public PolygonToGeoJSON() {
        super(new JsonMapper());
    }

    @Override
    @SuppressWarnings("rawtypes")
    protected void writeShapeSpecificSerialization(Polygon value, JsonGenerator jgen, SerializerProvider provider)
            throws IOException {

        jgen.writeFieldName("type");
        jgen.writeString("Polygon");
        jgen.writeArrayFieldStart("coordinates");
        JsonSerializer<Object> ser = provider.findValueSerializer(Double.class, null);
        writeLineString(value.getExteriorRing(), jgen, provider, ser);
        for (int i = 0; i < value.getNumInteriorRing(); i++) {
            writeLineString(value.getInteriorRingN(i), jgen, provider, ser);
        }

        jgen.writeEndArray();
    }

    /**
     * Writes a ring to the json
     */
    protected void writeLineString(LineString<C2D> line, JsonGenerator jgen, SerializerProvider provider,
            JsonSerializer<Object> ser) throws IOException {

        jgen.writeStartArray();
        for (int i = 0; i < line.getNumPositions(); i++) {

            jgen.writeStartArray();
            C2D position = line.getPositionN(i);
            ser.serialize(position.getX(), jgen, provider);
            ser.serialize(position.getY(), jgen, provider);
            jgen.writeEndArray();
        }

        jgen.writeEndArray();
    }

    @Override
    @SuppressWarnings("rawtypes")
    protected double[] envelopeToCoordinates(Envelope e) {

        Position upperLeft = e.upperLeft();
        Position lowerRigth = e.lowerRight();
        return new double[] { lowerRigth.getCoordinate(0), lowerRigth.getCoordinate(1), upperLeft.getCoordinate(0),
                upperLeft.getCoordinate(1) };
    }
}

Also, because I don't know how to change all the geometry types I can't make a decent pull request.

Obs: I am not sure about the envelopeToCoordinates method.

[aVolpe]

This works well with a property like this:

@JsonSerialize(using = PolygonToGeoJSON.class)
Polygon<C2D> shape;

[rivasyafri]

I know that the current code doesn't work well with geolatte geom 1.0.x. Can you give me insight how to deserialize Polygon? The GeometryDeserialize isn't working

[jwgmeligmeyling]

For 1.x you want to use the GeolatteGeomModule from the org.geolatte:geolatte-geojson artefact.