/*
* 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 java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import org.geotools.geometry.iso.aggregate.MultiSurfaceImpl;
import org.geotools.geometry.iso.coordinate.EnvelopeImpl;
import org.geotools.geometry.iso.coordinate.PolygonImpl;
import org.geotools.geometry.iso.coordinate.SurfacePatchImpl;
import org.geotools.geometry.iso.io.GeometryToString;
import org.geotools.geometry.iso.operation.IsSimpleOp;
import org.opengis.geometry.DirectPosition;
import org.opengis.geometry.Envelope;
import org.opengis.geometry.Geometry;
import org.opengis.geometry.TransfiniteSet;
import org.opengis.geometry.aggregate.MultiSurface;
import org.opengis.geometry.complex.CompositeSurface;
import org.opengis.geometry.primitive.OrientableSurface;
import org.opengis.geometry.primitive.PrimitiveFactory;
import org.opengis.geometry.primitive.Ring;
import org.opengis.geometry.primitive.Surface;
import org.opengis.geometry.primitive.SurfaceBoundary;
import org.opengis.geometry.primitive.SurfacePatch;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.referencing.operation.MathTransform;
import org.opengis.referencing.operation.TransformException;
/**
*
* Surface (Figure 12) a subclass of Primitive and is the basis for
* 2-dimensional geometry. Unorientable surfaces such as the Möbius band are not
* allowed. The orientation of a surface chooses an "up" direction through the
* choice of the upward normal, which, if the surface is not a cycle, is the
* side of the surface from which the exterior boundary appears
* counterclockwise. Reversal of the surface orientation reverses the curve
* orientation of each boundary component, and interchanges the conceptual "up"
* and "down" direction of the surface. If the surface is the boundary of a
* solid, the "up" direction is usually outward. For closed surfaces, which have
* no boundary, the up direction is that of the surface patches, which must be
* consistent with one another. Its included SurfacePatches describe the
* interior structure of a Surface
*
* NOTE Other than the restriction on orientability, no other "validity"
* condition is required for Surface.
*
* @author Jackson Roehrig & Sanjay Jena
*
*
*
* @source $URL$
*/
public class SurfaceImpl extends OrientableSurfaceImpl implements Surface {
private static final long serialVersionUID = 2431540523002962079L;
/**
* The "Segmentation" association relates this Surface to a set of
* SurfacePatches that shall be joined together to form this Surface.
* Depending on the interpolation method, the set of patches may require
* significant additional structure. In general, the form of the patches
* shall be defined in the application schema.
*
* Surface::patch [1..n] : SurfacePatch SurfacePatch::surface [0,1] :
* Reference<Surface>
*
* If the Surface.coordinateDimension is 2, then the entire Surface is one
* logical patch defined by linear interpolation from the boundary.
*
* NOTE In this standard, surface patches do not appear except in the
* context of a surface, and therefore the cardinality of the surface role
* in this association could be 1 which would preclude the use of surface
* patches except in this manner. While this would not affect this Standard,
* leaving the cardinality as 0..1 allows other standards based on this
* one to use surface patches in a more open-ended manner.
*/
protected ArrayList<? extends SurfacePatch> patch = null;
private SurfaceBoundary boundary = null;
private Envelope envelope;
// /**
// * Constructor without arguments
// * Surface Patches have to be setted after
// * @param factory
// */
// public SurfaceImpl(GeometryFactoryImpl factory) {
// super(factory);
// this.patch = null;
// }
/**
* Constructor The first version of the constructor for Surface takes a list
* of SurfacePatches with the appropriate side-toside relationships and
* creates a Surface.
*
* Surface::Surface(patch[1..n] : SurfacePatch) : Surface
*
* @param crs
* @param patch
*/
public SurfaceImpl(CoordinateReferenceSystem crs,
List<? extends SurfacePatch> patch) {
super(crs, null, null, null);
this.initializeSurface(patch);
}
/**
* Constructor The second version, which is guaranteed to work always in 2D
* coordinate spaces, constructs a Surface by indicating its boundary as a
* collection of Curves organized into a SurfaceBoundary. In 3D coordinate
* spaces, this second version of the constructor shall require all of the
* defining boundary Curve instances to be coplanar (lie in a single plane)
* which will define the surface interior.
*
* Surface::Surface(bdy : SurfaceBoundary) : Surface
* @param boundary
* The SurfaceBoundary which defines the Surface
*/
public SurfaceImpl(SurfaceBoundary boundary) {
super(boundary.getCoordinateReferenceSystem(), null, null, null);
// Set Boundary
this.boundary = boundary;
// Set Envelope
this.envelope = boundary.getEnvelope();
// TODO Is it really necessary to create the surface patches?
// Create Surface Patch on basis of the Boundary
ArrayList<SurfacePatch> newPatchList = new ArrayList<SurfacePatch>();
newPatchList.add(new PolygonImpl((SurfaceBoundaryImpl)boundary, (SurfaceImpl)this));
this.patch = newPatchList;
}
/**
* Initializes the Surface:
* - Sets the surface patches
* - Sets the Boundary, or calculates it if doesn´t exist
*
* @param patch
* List of SurfacePatch´s
* @param surfaceBoundary
* SurfaceBoundary; will be calculated if this parameter is NULL
*/
private void initializeSurface(List<? extends SurfacePatch> patch) {
if (patch == null)
throw new IllegalArgumentException("Empty array SurfacePatch."); //$NON-NLS-1$
if (patch.isEmpty())
throw new IllegalArgumentException("Empty array SurfacePatch."); //$NON-NLS-1$
// Calculate the boundary for the SurfacePatches. The continuity of the SurfacePatches is checked within the creation of the surface boundary
this.boundary = this.createBoundary(patch);
/* Add patches to patch list */
ArrayList<SurfacePatch> newPatchList = new ArrayList<SurfacePatch>();
for (SurfacePatch p : patch) {
if (p != null)
newPatchList.add(p);
}
this.patch = newPatchList;
// Build the envelope for the Surface based on the SurfacePatch envelopes
SurfacePatchImpl tFirstPatch = (SurfacePatchImpl) patch.get(0);
//this.envelope = new EnvelopeImpl(tFirstPatch.getEnvelope());
this.envelope = new EnvelopeImpl(tFirstPatch.getEnvelope());
for (SurfacePatch p : patch)
((EnvelopeImpl) this.envelope).expand(((SurfacePatchImpl) p)
.getEnvelope());
}
/**
* Creates a SurfaceBoundary by a list of neigboured patches
*
* @param patches List of surface patches that represent the surface
* @return the SurfaceBoundary of the surface represented by the set of surface patches
* @throws IllegalArgument Exception if the union of the surface patches is not a surface. That means that the patches are not continuous.
*/
private SurfaceBoundaryImpl createBoundary(List<? extends SurfacePatch> patches) {
if (patches.isEmpty())
return null;
SurfacePatch firstPatch = patches.get(0);
if (patches.size() == 1)
return (SurfaceBoundaryImpl) firstPatch.getBoundary();
Surface firstPatchSurface = new SurfaceImpl(firstPatch.getBoundary());
Set<OrientableSurface> surfaceList = new HashSet<OrientableSurface>();
for (int i=1; i<patches.size(); i++) {
SurfacePatch nextPatch = patches.get(i);
surfaceList.add(new SurfaceImpl(nextPatch.getBoundary()));
}
MultiSurface ms = new MultiSurfaceImpl(getCoordinateReferenceSystem(), surfaceList);
TransfiniteSet unionResultSurface = firstPatchSurface.union(ms);
if (! (unionResultSurface instanceof SurfaceImpl))
throw new IllegalArgumentException("Surface patches are not continuous");
return (SurfaceBoundaryImpl) ((SurfaceImpl)unionResultSurface).getBoundary();
}
/*
* (non-Javadoc)
*
* @see org.geotools.geometry.featgeom.primitive.PrimitiveImpl#getBoundary()
*/
public SurfaceBoundaryImpl getBoundary() {
// ok
// Return the Boundary of this surface
return (SurfaceBoundaryImpl) boundary;
}
/**
* Sets the Boundary of the Surface
*
* @param boundary
* The boundary to set.
*/
public void setBoundary(SurfaceBoundaryImpl boundary) {
this.boundary = boundary;
}
/**
* Sets the Surface Patches and Boundary for the Surface
*
* @param surfacePatches -
* ArrayList of Surface Patches, which represent the Surface
* @param surfaceBoundary -
* Surface Boundary of the Surface
*/
protected void setPatches(List<? extends SurfacePatch> surfacePatches) {
this.initializeSurface(surfacePatches);
}
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.primitive.Surface#getPatches()
*/
public List<? extends SurfacePatch> getPatches() {
return this.patch;
}
/*
* (non-Javadoc)
*
* @see org.geotools.geometry.featgeom.root.GeometryImpl#getEnvelope()
*/
public Envelope getEnvelope() {
// TODO documentation
return this.envelope;
}
/*
* (non-Javadoc)
*
* @see org.stdss.fgeo.primitive.OrientablePrimitive#createMate()
*/
protected OrientablePrimitiveImpl createProxy() {
// TODO semantic SJ, JR
// TODO implementation
// TODO test
// TODO documentation
return null;
}
// Not used
// /**
// * @param distance
// */
// public void splitBoundary(double distance) {
// this.getBoundary().split(distance);
// }
/*
* (non-Javadoc)
*
* @see org.geotools.geometry.featgeom.root.GeometryImpl#clone()
*/
public SurfaceImpl clone() throws CloneNotSupportedException {
// Test OK
// Clone SurfaceBoundary and use it to create new Surface
SurfaceBoundary newBoundary = (SurfaceBoundary) this.boundary.clone();
return new SurfaceImpl(newBoundary);
}
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.primitive.OrientableSurface#getComposite()
*/
public CompositeSurface getComposite() {
// TODO semantic SJ, JR
// TODO implementation
// TODO test
// TODO documentation
return null;
}
public Surface getPrimitive() {
return null;
}
public OrientableSurface[] getProxy() {
return null;
}
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.coordinate.root.Geometry#isSimple()
*/
public boolean isSimple() {
// Test OK
// Test simplicity by building a topological graph and testing for self-intersection
// Is Simple, if the exterior ring and the interior rings does not have selfintersections
// and the exterior ring and the interior rings don´t touch or intersect each other.
IsSimpleOp simpleOp = new IsSimpleOp();
return simpleOp.isSimple(this);
}
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.coordinate.GenericSurface#getUpNormal(org.opengis.geometry.coordinate.DirectPosition)
*/
public double[] getUpNormal(DirectPosition point) {
// TODO semantic SJ, JR
// TODO implementation
// TODO test
// TODO documentation
return null;
}
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.coordinate.GenericSurface#getPerimeter()
*/
public double getPerimeter() {
// TODO semantic SJ, JR
// TODO implementation
// TODO test
// TODO documentation
return 0;
}
/*
* (non-Javadoc)
*
* @see org.opengis.geometry.coordinate.GenericSurface#getArea()
*/
public double getArea() {
// TODO semantic SJ, JR
// TODO implementation
// TODO test
// TODO documentation
return 0;
}
/*
* (non-Javadoc)
*
* @see org.geotools.geometry.featgeom.root.GeometryImpl#getDimension(org.opengis.geometry.coordinate.DirectPosition)
*/
public int getDimension(DirectPosition point) {
// TODO semantic SJ, JR
// TODO implementation
// TODO test
// TODO documentation
return 2;
}
public String toString() {
return GeometryToString.getString(this);
}
/**
* Returns a list of the rings which define the surface: First element is
* the exterior ring (island), the following elements, if exist, define the
* interior rings (holes)
*
* @return List of Ring: First element is the exterior ring (island),
* the following elements, if exist, define the interior rings
* (holes)
*/
public List<Ring> getBoundaryRings() {
List<Ring> rList = new ArrayList();
rList.add(this.boundary.getExterior());
Iterator tInteriorRings = this.boundary.getInteriors().iterator();
while (tInteriorRings.hasNext()) {
rList.add((Ring) tInteriorRings.next());
}
return rList;
}
/* (non-Javadoc)
* @see org.geotools.geometry.featgeom.root.GeometryImpl#getRepresentativePoint()
*/
public DirectPosition getRepresentativePoint() {
// Return the representative point of the surface´s boundary
// TODO Note: This solution is not correct, since the representative point of the surface boundary may not be on the surface
return this.getBoundary().getRepresentativePoint();
}
@Override
public int hashCode() {
final int PRIME = 31;
int result = 1;
result = PRIME * result + ((boundary == null) ? 0 : boundary.hashCode());
result = PRIME * result + ((envelope == null) ? 0 : envelope.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
final SurfaceImpl other = (SurfaceImpl) obj;
if (boundary == null) {
if (other.boundary != null)
return false;
} else if (!boundary.equals(other.boundary))
return false;
/* Envelope.class doesn't have equals implemented
if (envelope == null) {
if (other.envelope != null)
return false;
} else if (!envelope.equals(other.envelope))
return false;
*/
return true;
}
/*
* (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 TransformException {
// loop through each ring in this Surface and transform it to the new CRS, then
// use the new rings to build a new Surface and return that.
PrimitiveFactory primitiveFactory = new PrimitiveFactoryImpl(newCRS, getPositionFactory());
List<Ring> currentRings = this.getBoundaryRings();
Iterator<Ring> iter = currentRings.iterator();
Ring newExterior = null;
List<Ring> newInteriors = new ArrayList<Ring>();
while (iter.hasNext()) {
Ring thisRing = (Ring) iter.next();
// exterior Ring should be first element in the list
if (newExterior == null) {
newExterior = (Ring) thisRing.transform(newCRS, transform );
}
else {
newInteriors.add((Ring) thisRing.transform(newCRS, transform));
}
}
// use the new Ring list to build a new Surface and return it
SurfaceBoundaryImpl surfaceBoundary = (SurfaceBoundaryImpl) primitiveFactory.createSurfaceBoundary(newExterior, newInteriors);
SurfaceImpl newSurface = (SurfaceImpl) primitiveFactory.createSurface(surfaceBoundary);
return newSurface;
}
}