code: /*******************************************************************************
   * Copyright (c) 2015 VoyagerSearch and others
   * All rights reserved. This program and the accompanying materials
   * are made available under the terms of the Apache License, Version 2.0 which
   * accompanies this distribution and is available at
   *    http://www.apache.org/licenses/LICENSE-2.0.txt
   ******************************************************************************/
  
  package org.locationtech.spatial4j.io.jackson;
  
  import java.io.IOException;
  
  import org.locationtech.spatial4j.context.jts.JtsSpatialContext;
  import org.locationtech.spatial4j.context.jts.JtsSpatialContextFactory;
  import org.locationtech.spatial4j.shape.Shape;
  
  import com.fasterxml.jackson.core.JsonParser;
  import com.fasterxml.jackson.core.JsonProcessingException;
  import com.fasterxml.jackson.databind.DeserializationContext;
  import com.fasterxml.jackson.databind.JsonDeserializer;
  import org.locationtech.jts.geom.Geometry;
  
  public class GeometryDeserializer extends JsonDeserializer<Geometry>
  {
    // Create a context that will allow any JTS shape
    static final JtsSpatialContext JTS;
    static {
      JtsSpatialContextFactory factory = new JtsSpatialContextFactory();
      factory.geo = false;
      factory.useJtsLineString = true;
      factory.useJtsMulti = true;
      factory.useJtsPoint = true;
      JTS = new JtsSpatialContext(factory);
    }
    
    final ShapeDeserializer dser;
    
    public GeometryDeserializer() {
      dser = new ShapeDeserializer(JTS);
    }
    
    @Override
    public Geometry deserialize(JsonParser jp, DeserializationContext ctxt)
        throws IOException, JsonProcessingException {
      Shape shape = dser.deserialize(jp, ctxt);
      if(shape!=null) {
        return JTS.getShapeFactory().getGeometryFrom(shape);
      }
      return null;
    }
  }
  