/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2006-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.geometry.iso.primitive;
import org.geotools.geometry.iso.PositionFactoryImpl;
import org.geotools.geometry.iso.complex.CompositePointImpl;
import org.geotools.geometry.iso.coordinate.DirectPositionImpl;
import org.geotools.geometry.iso.coordinate.EnvelopeImpl;
import org.geotools.geometry.iso.io.GeometryToString;
import org.opengis.geometry.DirectPosition;
import org.opengis.geometry.Envelope;
import org.opengis.geometry.Geometry;
import org.opengis.geometry.MismatchedDimensionException;
import org.opengis.geometry.PositionFactory;
import org.opengis.geometry.TransfiniteSet;
import org.opengis.geometry.complex.Complex;
import org.opengis.geometry.coordinate.Position;
import org.opengis.geometry.primitive.Bearing;
import org.opengis.geometry.primitive.OrientablePrimitive;
import org.opengis.geometry.primitive.Point;
import org.opengis.geometry.primitive.PrimitiveBoundary;
import org.opengis.geometry.primitive.PrimitiveFactory;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.referencing.operation.MathTransform;
import org.opengis.referencing.operation.TransformException;
/**
*
* Point is the basic data type for a geometric object consisting of one and
* only one point.
*
* @author Jackson Roehrig & Sanjay Jena
*
*
*
* @source $URL$
*/
public class PointImpl extends PrimitiveImpl implements Point {
private static final long serialVersionUID = -1750949790172649244L;
/**
* The attribute "position" is the DirectPosition of this Point.
*
* Point::position : DirectPosition
*
* Point is the only subclass of Primitive that cannot use Positions to
* represent its defining geometry. A Position is either a DirectPostion or
* a reference to a Point (from which a DirectPosition2D may be obtained).
*
* By not allowing Point to use this technique, infinitely recursive
* references are prevented. Applications may choose another mechanism to
* prevent this logical problem.
*
* NOTE In most cases, the state of a Point is fully determined by its
* position attribute. The only exception to this is if the Point has been
* subclassed to provide additional non-geometric information such as
* symbology.
*/
private DirectPositionImpl position = null;
public PointImpl(final DirectPosition position) {
super( position.getCoordinateReferenceSystem() );
this.position = new DirectPositionImpl( position );
}
/**
* The constructor PointImpl creates a Point at a given position, backed by the DirectPosition
* PointImpl::PointImpl(position : DirectPositionImpl) : PointImpl
*
* @param crs
* @param dp
*/
public PointImpl(CoordinateReferenceSystem crs, final DirectPositionImpl dp) {
super(crs, null, null, null);
// Cloning of the DP is done in the factory class
this.position = dp;
}
/*
* (non-Javadoc)
*
* @see org.geotools.geometry.featgeom.root.GeometryImpl#clone()
*/
public PointImpl clone() throws CloneNotSupportedException {
return new PointImpl(this.position);
//return this.getGeometryFactory().getPrimitiveFactory().createPoint(this.getPosition().getCoordinates());
}
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.primitive.Point#getPosition()
*/
@Deprecated
public DirectPositionImpl getPosition() {
return this.position;
}
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.primitive.Point#getDirectPosition()
*/
public DirectPositionImpl getDirectPosition() {
return this.position;
}
/**
* Sets the value of position
*
* @param p
*/
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.primitive.Point#setPosition(org.opengis.geometry.coordinate.DirectPosition)
*/
@Deprecated
public void setPosition(DirectPosition p) {
this.position = new DirectPositionImpl(p);
//this.position = this.getGeometryFactory().getGeometryFactoryImpl().createDirectPosition(p);
}
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.primitive.Point#setPosition(org.opengis.geometry.coordinate.DirectPosition)
*/
public void setDirectPosition(DirectPosition p) {
this.position = new DirectPositionImpl(p);
//this.position = this.getGeometryFactory().getGeometryFactoryImpl().createDirectPosition(p);
}
/**
* Overwrite toString method for WKT output
*/
public String toString() {
return GeometryToString.getString(this);
}
/**
* The operation "bearing" returns the bearing, as a unit vector, of the
* tangent (at this Point) to the curve between this Point and a passed
* Position.
*
* Point::bearing(toPoint : Position) : Bearing
*
* The choice of the curve type for defining the bearing is dependent on the
* SC_CRS in which this Point is defined. For example, in the Mercator
* projection, the curve is the rhumb line. In 3D, geocentric coordinate
* system, the curve may be the geodesic joining the two points along the
* surface of the geoid or ellipsoid in use. Implementations that support
* this function shall specify the nature of the curve to be used.
*
* NOTE The type "Vector" is a common data type defined in ISO TS 19103.
*
* @param toPoint
* @return Bearing
*
*/
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.primitive.Point#getBearing(org.opengis.geometry.coordinate.Position)
*/
public Bearing getBearing(Position toPoint) {
// TODO Auto-generated method stub
return null;
}
/**
* The method <code>getDimension</code> returns the inherent dimension of
* this Object, which is less than or equal to the coordinate dimension. The
* dimension of a collection of geometric objects is the largest dimension
* of any of its pieces. Points are 0-dimensional, curves are 1-dimensional,
* surfaces are 2-dimensional, and solids are 3-dimensional. Locally, the
* dimension of a geometric object at a point is the dimension of a local
* neighborhood of the point - that is the dimension of any coordinate
* neighborhood of the point. Dimension is unambiguously defined only for
* DirectPositions interior to this Object. If the passed DirectPosition2D
* is NULL, then the method returns the largest possible dimension for any
* DirectPosition2D in this Object.
*
* @param point
* a <code>DirectPosition</code> value
* @return the value 0 as <code>int</code>
*/
/*
* (non-Javadoc)
*
* @see org.geotools.geometry.featgeom.root.GeometryImpl#getDimension(org.opengis.geometry.coordinate.DirectPosition)
*/
public int getDimension(DirectPosition point) {
return 0;
}
/**
* The method <code>getEnvelope</code> returns the minimum bounding box
* for this Object. There are cases for which the min and max positions
* would be outside the domain of validity of the object's coordinate
* reference system. This method is included here only as an interface, as
* applications may choose to implement in different manners.
*
* @return an <code>Envelope</code> with zero width and length
*/
/*
* (non-Javadoc)
*
* @see org.geotools.geometry.featgeom.root.GeometryImpl#getEnvelope()
*/
public Envelope getEnvelope() {
/* Return envelope only consisting of this point */
return new EnvelopeImpl(this.position);
//return this.getGeometryFactory().getGeometryFactoryImpl().createEnvelope(this.position.getCoordinates());
}
/**
* The operation "getBoundary" is a specialization of the boundary operation
* at Object, and returns a NULL value indication an empty set.
*
* Point::boundary() : NULL
*
* @return null
*/
/*
* (non-Javadoc)
*
* @see org.geotools.geometry.featgeom.primitive.PrimitiveImpl#getBoundary()
*/
public PrimitiveBoundary getBoundary() {
// a Point does not have a Boundary
return null;
}
/*
* (non-Javadoc)
*
* @see org.geotools.geometry.featgeom.root.GeometryImpl#getRepresentativePoint()
*/
public DirectPosition getRepresentativePoint() {
return this.position;
}
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.coordinate.root.Geometry#isSimple()
*/
public boolean isSimple() {
// A Point is always simple
return true;
}
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.coordinate.root.Geometry#isCycle()
*/
public boolean isCycle() {
// A Point is always a cicle, because its boundary is always NULL
return true;
}
/*
* (non-Javadoc)
*
* @see org.geotools.geometry.featgeom.root.GeometryImpl#getCentroid()
*/
public DirectPosition getCentroid() {
// Return this point, which is its own centroid
return this.position;
}
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.primitive.Primitive#getProxy()
*/
public OrientablePrimitive[] getProxy() {
// TODO ok?!
return null;
}
/* (non-Javadoc)
* @see org.geotools.geometry.featgeom.root.GeometryImpl#equals(org.opengis.geometry.coordinate.TransfiniteSet)
*/
public boolean equals(TransfiniteSet pointSet) {
// Overwrite the equals method for performance reason
// In that way, we do not need to build a topological graph to compare this trivial coordinates
// If the parameter is not a Point, call the equals method from GM_Object
if (!(pointSet instanceof PointImpl))
return super.equals(pointSet);
return this.getPosition().equals(((PointImpl)pointSet).getPosition());
}
public Complex getClosure() {
return new CompositePointImpl( this );
// return complexFactory.createCompositePoint( this );
}
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.coordinate.root.Geometry#transform(org.opengis.referencing.crs.CoordinateReferenceSystem,
* org.opengis.referencing.operation.MathTransform)
*/
public Geometry transform(CoordinateReferenceSystem newCRS,
MathTransform transform) throws MismatchedDimensionException, TransformException {
PositionFactory newPositionFactory = new PositionFactoryImpl(newCRS, getPositionFactory().getPrecision());
PrimitiveFactory newPrimitiveFactory = new PrimitiveFactoryImpl(newCRS, newPositionFactory);
DirectPosition dp1 = new DirectPositionImpl(newCRS);
dp1 = transform.transform(((PointImpl)this).getPosition(), dp1);
return newPrimitiveFactory.createPoint( dp1 );
}
}