How to use

getCentroid

method

in

com.vividsolutions.jts.geom.Geometry

public void setGeom(Geometry geom) throws EmptyPolygonException, UnsupportedGeometryException {
  if (geom instanceof MultiPolygon) {
    if (geom.isEmpty()) {
      throw new EmptyPolygonException();
    }
    if (geom.getNumGeometries() > 1) {
      // LOG.warn("Multiple polygons in MultiPolygon, using only the first.");
      // TODO percolate this warning up somehow
    }
    this.geom = geom.getGeometryN(0);
  } else if( geom instanceof Point || geom instanceof Polygon){
    this.geom = geom;
  } else {
    throw new UnsupportedGeometryException( "Non-point, non-polygon Geometry, not supported." );
  }
  // cache a representative point
  Point point = geom.getCentroid();
  this.lat = point.getY();
  this.lon = point.getX();
}

public InteriorPointPoint(Geometry g)
{
 centroid = g.getCentroid().getCoordinate();
 add(g);
}

public InteriorPointLine(Geometry g)
{
 centroid = g.getCentroid().getCoordinate();
 addInterior(g);
 if (interiorPoint == null)
  addEndpoints(g);
}

static public Geometry centroid(Geometry arg0)
{
   Geometry _this = arg0;
   return _this.getCentroid();
}

  public static Geometry getCentroid(Geometry geometry) {
    if(geometry==null) {
      return null;
    }
    return geometry.getCentroid();
  }
}

static public Geometry centroid(Geometry arg0)
{
   if (arg0 == null) return null;
   Geometry _this = arg0;
   return _this.getCentroid();
}

  public static Geometry getCentroid(Geometry geometry) {
    if(geometry==null) {
      return null;
    }
    return geometry.getCentroid();
  }
}

  public static Geometry getCentroid(Geometry geometry) {
    if(geometry==null) {
      return null;
    }
    return geometry.getCentroid();
  }
}

@Override
public com.vividsolutions.jts.geom.Point getCentroid() {
  Geometry temp = getGeometry();
  if(temp != null){
    return temp.getCentroid();
  }
  return null;
}

@Override
public com.vividsolutions.jts.geom.Point getCentroid() {
  Geometry temp = getGeometry();
  if(temp != null){
    return temp.getCentroid();
  }
  return null;
}

@Override
public com.vividsolutions.jts.geom.Point getCentroid() {
  checkState();
  return this.boundingBoxGeometry.getCentroid();
}

/**
 * Returns the center of the specified {@link JtsGeometry}.
 *
 * @param shape the JTS shape to be transformed
 * @return the center
 */
@Override
public JtsGeometry apply(JtsGeometry shape) {
  Geometry centroid = shape.getGeom().getCentroid();
  return CONTEXT.makeShape(centroid);
}

  public Object evaluate(Object feature) {
    Geometry  arg0;


    try{  //attempt to get value and perform conversion
      arg0 = (Geometry) getExpression(0).evaluate(feature);
    }
    catch (Exception e) // probably a type error
    {
       throw new IllegalArgumentException("Filter Function problem for function getZ argument #0 - expected type Geometry");
    }

    return new Double(arg0.getCentroid().getCoordinate().z);
    
  }
}

 @Override
 public Item item(final QueryContext qc, final InputInfo ii) throws QueryException {
  return toElement(checkGeo(0, qc).getCentroid(), qc);
 }
}

public InteriorPointPoint(Geometry g)
{
 centroid = g.getCentroid().getCoordinate();
 add(g);
}

/**
 * Returns the center of the specified {@link JtsGeometry}.
 *
 * @return the center
 */
@Override
public JtsGeometry apply() {
  Geometry centroid = shape.apply().getGeom().getCentroid();
  return CONTEXT.makeShape(centroid);
}

@Override
public JtsPoint getCenter() {
 if (isEmpty()) //geom.getCentroid == null
  return new JtsPoint(ctx.getGeometryFactory().createPoint((Coordinate)null), ctx);
 return new JtsPoint(geom.getCentroid(), ctx);
}

/**
 * Gets a point to represent the Geometry. If the Geometry is a point, this is returned.
 * Otherwise, the centroid is used.
 * 
 * @param g the geometry to find a point for
 * @return a point representing the Geometry
 */
private static Coordinate getPoint(Geometry g) {
  if (g.getNumPoints() == 1)
    return g.getCoordinate();
  return g.getCentroid().getCoordinate();
}

public InteriorPointLine(Geometry g)
{
 centroid = g.getCentroid().getCoordinate();
 addInterior(g);
 if (interiorPoint == null)
  addEndpoints(g);
}

/**
 * Returns the centroid of this geometry.
 */
public final DirectPosition getCentroid() {
  com.vividsolutions.jts.geom.Geometry jtsGeom = getJTSGeometry();
  com.vividsolutions.jts.geom.Point jtsCentroid = jtsGeom.getCentroid();
  return JTSUtils.pointToDirectPosition(jtsCentroid,
      getCoordinateReferenceSystem());
}