Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 3

 * of the License, or (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.fmap.geom.primitive.impl;

import java.awt.Shape;

import java.awt.geom.AffineTransform;

import java.awt.geom.PathIterator;

import java.io.Serializable;

import org.cresques.cts.ICoordTrans;

import org.cresques.cts.IProjection;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.exception.CreateGeometryException;

import org.gvsig.fmap.geom.handler.Handler;

import org.gvsig.fmap.geom.operation.GeometryOperation;

import org.gvsig.fmap.geom.operation.GeometryOperationContext;

import org.gvsig.fmap.geom.operation.GeometryOperationException;

import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException;

import org.gvsig.fmap.geom.primitive.Envelope;

import org.gvsig.fmap.geom.primitive.FShape;

import org.gvsig.fmap.geom.primitive.GeneralPathX;

import org.gvsig.fmap.geom.primitive.NullGeometry;

import org.gvsig.fmap.geom.primitive.Point;

import org.gvsig.fmap.geom.primitive.Primitive;

import org.gvsig.fmap.geom.type.GeometryType;

import org.gvsig.fmap.geom.util.Converter;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import com.vividsolutions.jts.geom.Coordinate;

import com.vividsolutions.jts.geom.GeometryFactory;

import com.vividsolutions.jts.io.WKBWriter;

import com.vividsolutions.jts.operation.distance.DistanceOp;

import com.vividsolutions.jts.operation.overlay.snap.GeometrySnapper;

import com.vividsolutions.jts.operation.valid.IsValidOp;

import com.vividsolutions.jts.operation.valid.TopologyValidationError;

import org.gvsig.fmap.geom.impl.DefaultValidationStatus;

import org.gvsig.fmap.geom.primitive.OrientableCurve;

import org.gvsig.fmap.geom.primitive.OrientableSurface;

/**

 * @author Jorge Piera Llodr� (jorge.piera@iver.es)

 */

public abstract class AbstractPrimitive implements Primitive, FShape, Shape, Serializable {

        private static final Logger logger = LoggerFactory.getLogger(AbstractPrimitive.class);

        private static final long serialVersionUID = -4334977368955260872L;

        protected String id = null;

        protected IProjection projection = null;

        protected GeometryType geometryType = null;

        protected static final GeometryManager geomManager = GeometryLocator.getGeometryManager();

        /**

         * The constructor with the GeometryType like and argument 

         * is used by the {@link GeometryType}{@link #create()}

         * to create the geometry

         * @param type

         * The geometry type

         */

        public AbstractPrimitive(GeometryType geometryType) {

                this(geometryType, null, null);                

        }

        AbstractPrimitive(int type, int subtype) {

                try {

                        geometryType = geomManager.getGeometryType(type, subtype);

                } catch (Exception e) {

                        //TODO Not registered geometry

                        geometryType = null;

                }

        }        

        public AbstractPrimitive(GeometryType geometryType, String id, IProjection projection) {

                super();

                this.id = id;

                this.projection = projection;

                this.geometryType = geometryType;

        }

        public AbstractPrimitive(GeometryType geometryType, IProjection projection) {

                this(geometryType, null, projection);

        }

        /* (non-Javadoc)

         * @see org.gvsig.fmap.geom.Geometry#getGeometryType()

         */

        public GeometryType getGeometryType() {

                return geometryType;

        }

        /* (non-Javadoc)

         * @see org.gvsig.fmap.geom.Geometry#getType()

         */

        public int getType() {

                return geometryType.getType();

        }

        /**

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.core.Geometry#getInternalShape()

         * @deprecated this Geometry is a Shape.

         */

        public Shape getInternalShape() {

                return this;

        }

        /* (non-Javadoc)

         * @see org.gvsig.geometries.iso.AbstractGeometry#getId()

         */

        public String getId() {

                return id;

        }

        /* (non-Javadoc)

         * @see org.gvsig.geometries.iso.AbstractGeometry#getSRS()

         */

        public IProjection getSRS() {

                return projection;

        }

        /* (non-Javadoc)

         * @see org.gvsig.geometries.iso.AbstractGeometry#transform(org.cresques.cts.IProjection)

         */

        public AbstractPrimitive transform(IProjection newProjection) {

                Geometry newGeom = cloneGeometry();

                ICoordTrans coordTrans = projection.getCT(newProjection);

                newGeom.reProject(coordTrans);

                return (AbstractPrimitive)newGeom;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.geom.Geometry#fastIntersects(double, double, double, double)

         */

        public boolean fastIntersects(double x, double y, double w, double h) {

                boolean resp = true;

                try {

                        resp = intersectsRectangle(this, x, y, w, h);

                } catch (GeometryOperationException e) {

                        logger.error("While doing fastintersects: " + e.getMessage(), e);

                }

                return resp;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.geom.Geometry#cloneGeometry()

         */

        public Geometry cloneGeometry() {

                return (Geometry)cloneFShape();

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.geom.Geometry#getHandlers(int)

         */

        public Handler[] getHandlers(int type) {

                if (type==STRETCHINGHANDLER){

                        return getStretchingHandlers();

                }else if (type==SELECTHANDLER){

                        return getSelectHandlers();

                }

                return null;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.geom.Geometry#isSimple()

         */

        public boolean isSimple() {

            com.vividsolutions.jts.geom.Geometry jtsgeom = this.getJTS();

            return jtsgeom.isSimple();

        }

        public boolean isValid() {

            try {

                com.vividsolutions.jts.geom.Geometry jtsgeom = this.getJTS();

                return jtsgeom.isValid();

            } catch(Exception ex) {

                return false;

            }

        }

        public ValidationStatus getValidationStatus() {

            DefaultValidationStatus status = new DefaultValidationStatus(

                    ValidationStatus.VALID,

                    null

            );

            com.vividsolutions.jts.geom.Geometry jtsgeom = null;

            try {

                jtsgeom = this.getJTS();

                IsValidOp validOp = new IsValidOp(jtsgeom);

                if( validOp != null ) {

                    status.setValidationError(validOp.getValidationError());

                }

            } catch(Exception ex) {

                status.setStatusCode(ValidationStatus.CURRUPTED);

                status.setMesage("The geometry is corrupted.");

                if( this instanceof OrientableSurface ) {

                    int vertices = ((OrientableSurface)this).getNumVertices();

                    if( vertices < 3) {

                        status.setStatusCode(ValidationStatus.TOO_FEW_POINTS);

                        status.setMesage(TopologyValidationError.errMsg[TopologyValidationError.TOO_FEW_POINTS]);

                    }

                } else if( this instanceof OrientableCurve ) {

                    int vertices = ((OrientableCurve)this).getNumVertices();

                    if( vertices < 2) {

                        status.setStatusCode(ValidationStatus.TOO_FEW_POINTS);

                        status.setMesage(TopologyValidationError.errMsg[TopologyValidationError.TOO_FEW_POINTS]);

                    }

                } 

            }

            return status;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.geom.Geometry#invokeOperation(int, org.gvsig.fmap.geom.operation.GeometryOperationContext)

         */

        public Object invokeOperation(int index, GeometryOperationContext ctx) throws GeometryOperationNotSupportedException, GeometryOperationException {

                return geomManager.invokeOperation(index, this, ctx);

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.geom.Geometry#invokeOperation(java.lang.String, org.gvsig.fmap.geom.operation.GeometryOperationContext)

         */

        public Object invokeOperation(String oppName, GeometryOperationContext ctx) throws GeometryOperationNotSupportedException, GeometryOperationException {

                return geomManager.invokeOperation(oppName, this, ctx);

        }

        /*

         * (non-Javadoc)

         * @see java.lang.Comparable#compareTo(T)

         */

        public int compareTo(Object arg0) {

                // TODO Auto-generated method stub

                return -1;

        }

        /*

         * (non-Javadoc)

         * @see java.lang.Object#toString()

         */

        public String toString() {

                String name=getGeometryType().getName();

                return name.substring(name.lastIndexOf(".")+1);

        }

        /*

         * (non-Javadoc)

         * @see java.lang.Object#equals(java.lang.Object)

         */

        public boolean equals(Object obj) {

                if (obj == null) {

                        return false;

                }

                if (this.getClass() != obj.getClass()) {

                        return false;

                }

                AbstractPrimitive other = (AbstractPrimitive) obj;

                if (this.getGeometryType().getType() != other.getGeometryType()

                                .getType()) {

                        return false;

                }

                if (this.getGeometryType().getSubType() != other.getGeometryType()

                                .getSubType()) {

                        return false;

                }

                if (this instanceof NullGeometry || obj instanceof NullGeometry) {

                    /*

                     * If any of them is null geometry, they both have to be

                     * null geometry, or else, they are not equal.

                     * This prevents null pointer exception in the rest of the

                     * method

                     */

                if (this instanceof NullGeometry && obj instanceof NullGeometry) {

                    return true;

                } else {

                    return false;

                }

                }

                if (this.projection != other.projection) {

                        if (this.projection == null) {

                                return false;

                        }

                        if (this.projection.getAbrev() != other.projection.getAbrev()) { //FIXME this must be false

                                return false;

                        }

                }

                if (!this.getBounds().equals(other.getBounds())) {

                        return false;

                }

                GeneralPathX myPath = this.getGeneralPath();

                GeneralPathX otherPath = other.getGeneralPath();

                if (myPath == null) {

                        if (otherPath != null) {

                                return false;

                        } else {

                                // TODO checkThis

                                return true;

                        }

                }

                if (myPath.getNumTypes() != otherPath.getNumTypes()) {

                        return false;

                }

                if (Math.abs(myPath.getNumCoords() - otherPath.getNumCoords()) > this

                                .getDimension()) {

                        return false;

                }

                PathIterator myIter = myPath.getPathIterator(null);

                PathIterator otherIter = otherPath.getPathIterator(null);

                int myType,otherType;

                // FIXME when 3D, 2DM and 3DM

                double[] myData = new double[6];

                double[] otherData = new double[6];

                double[] myFirst = new double[] { myPath.getPointAt(0).getX(),myPath.getPointAt(0).getY()};

                double[] otherFirst = new double[] { otherPath.getPointAt(0).getX(),otherPath.getPointAt(0).getY()};

                while (!myIter.isDone()) {

                        if (otherIter.isDone()) {

                                return false;

                        }

                        for (int i = 0; i < myData.length; i++) {

                                myData[i] = 0.0;

                                otherData[i] = 0.0;

                        }

                        myType = myIter.currentSegment(myData);

                        otherType = otherIter.currentSegment(otherData);

                        switch (myType) {

                        case PathIterator.SEG_LINETO:

                                if (otherType != myType) {

                                        if (otherType == PathIterator.SEG_CLOSE){

                                                if (!comparePathIteratorData(otherFirst, myData)) {

                                                        return false;

                                                }

                                        } else {

                                                return false;

                                        }

                                } else {

                                        if (!comparePathIteratorData(myData, otherData)) {

                                                return false;

                                        }

                                }

                                break;

                        case PathIterator.SEG_CLOSE:

                                if (otherType != myType) {

                                        if (otherType == PathIterator.SEG_LINETO) {

                                                if (!comparePathIteratorData(myFirst, otherData)) {

                                                        return false;

                                                }

                                        } else {

                                                return false;

                                        }

                                } else {

                                        if (!comparePathIteratorData(myData, otherData)) {

                                                return false;

                                        }

                                }

                                break;

                        case PathIterator.SEG_MOVETO:

                        case PathIterator.SEG_QUADTO:

                        case PathIterator.SEG_CUBICTO:

                                if (otherType != myType) {

                                        return false;

                                }

                                if (!comparePathIteratorData(myData, otherData)) {

                                        return false;

                                }

                                break;

                        } // end switch

                        myIter.next();

                        otherIter.next();

                }

                if (!otherIter.isDone()) {

                        return false;

                }

                return true;

        }

        private boolean comparePathIteratorData(double[] org, double[] other) {

                for (int i = 0; i < org.length; i++) {

                        if (Math.abs(org[i] - other[i]) > 0.0000001) {

                                return false;

                        }

                }

                return true;

        }

        /* (non-Javadoc)

         * @see org.gvsig.fmap.geom.primitive.FShape#getShapeType()

         */

        public int getShapeType() {

                return getType();

        }

        /**

         * Utility method

         * @param geometry

         * @param x

         * @param y

         * @return

         * @throws GeometryOperationException

         */

        protected boolean containsPoint(Geometry geom, double x, double y) throws GeometryOperationException {

                // exclude disjoint 

                Envelope env = geom.getEnvelope();

                if (x > env.getMaximum(0)) return false; 

                if (y > env.getMaximum(1)) return false; 

                if (x < env.getMinimum(0)) return false; 

                if (y < env.getMinimum(1)) return false; 

                // boxes overlap, need long version

                Geometry geompoint = null;

                try {

                        geompoint = GeometryLocator.getGeometryManager().createPoint(x, y, SUBTYPES.GEOM2D);

                } catch (Exception e1) {

                        throw new GeometryOperationException(geom.getType(), GeometryOperation.OPERATION_CONTAINS_CODE, e1);

                }

                GeometryOperationContext drgoc = new GeometryOperationContext();

                 drgoc.setAttribute("geom",geompoint);

                Object resp = null;

                boolean respboolean = true;

                try {

                        resp = geom.invokeOperation(GeometryOperation.OPERATION_CONTAINS_CODE, drgoc);

                        respboolean = ((Boolean) resp).booleanValue();

                } catch (Exception e) {

                        throw new GeometryOperationException(geom.getType(), GeometryOperation.OPERATION_CONTAINS_CODE, e);

                }

                return respboolean;

        }

        /**

         * 

         * @param geometry

         * @param x

         * @param y

         * @param w

         * @param h

         * @return

         */

        protected boolean containsRectangle(Geometry geom, double x, double y,

                        double w, double h) throws GeometryOperationException {

                // exclude disjoint boxes

                Envelope env = geom.getEnvelope();

                if (x > env.getMaximum(0)) return false; 

                if ((x+w) < env.getMinimum(0)) return false; 

                if (y > env.getMaximum(1)) return false; 

                if ((y+h) < env.getMinimum(1)) return false; 

                if (w == 0 && h == 0) {

                        return  containsPoint(geom, x, y); 

                }

                // boxes overlap, need long version

                Geometry rectgeom = null;

                GeneralPathX gpx = new GeneralPathX();

                gpx.moveTo(x, y);

                gpx.lineTo(x+w, y);

                gpx.lineTo(x+w, y+h);

                gpx.lineTo(x, y+h);

                gpx.lineTo(x, y);

                try {

                        rectgeom = GeometryLocator.getGeometryManager().createSurface(gpx, SUBTYPES.GEOM2D);

                } catch (Exception e1) {

                        throw new GeometryOperationException(geom.getType(), GeometryOperation.OPERATION_CONTAINS_CODE, e1);

                }

                GeometryOperationContext drgoc = new GeometryOperationContext();

                drgoc.setAttribute("geom",rectgeom);

                Object resp = null;

                boolean respboolean = true;

                try {

                        resp = geom.invokeOperation(GeometryOperation.OPERATION_CONTAINS_CODE, drgoc);

                        respboolean = ((Boolean) resp).booleanValue();

                } catch (Exception e) {

                        throw new GeometryOperationException(geom.getType(), GeometryOperation.OPERATION_CONTAINS_CODE, e);

                }

                return respboolean;

        }

        /**

         * 

         * @param geom

         * @param x

         * @param y

         * @param w

         * @param h

         * @return

         */

        protected boolean intersectsRectangle(Geometry geom, double x, double y,

                        double w, double h) throws GeometryOperationException {

                // exclude disjoint boxes

                Envelope env = geom.getEnvelope();

                if (x > env.getMaximum(0)) return false; 

                if ((x+w) < env.getMinimum(0)) return false; 

                if (y > env.getMaximum(1)) return false; 

                if ((y+h) < env.getMinimum(1)) return false; 

                // boxes overlap, need long version

                Geometry rectgeom = null;

                GeneralPathX gpx = new GeneralPathX();

                gpx.moveTo(x, y);

                gpx.lineTo(x+w, y);

                gpx.lineTo(x+w, y+h);

                gpx.lineTo(x, y+h);

                gpx.lineTo(x, y);

                try {

                        rectgeom = GeometryLocator.getGeometryManager().createSurface(gpx, SUBTYPES.GEOM2D);

                } catch (Exception e1) {

                        throw new GeometryOperationException(geom.getType(), GeometryOperation.OPERATION_INTERSECTS_CODE, e1);

                }

                GeometryOperationContext drgoc = new GeometryOperationContext();

                drgoc.setAttribute("geom",rectgeom);

                Object resp = null;

                boolean respboolean = true;

                try {

                        resp = geom.invokeOperation(GeometryOperation.OPERATION_INTERSECTS_CODE, drgoc);

                        respboolean = ((Boolean) resp).booleanValue();

                } catch (Exception e) {

                        throw new GeometryOperationException(geom.getType(), GeometryOperation.OPERATION_INTERSECTS_CODE, e);

                }

                return respboolean;

        }

        private com.vividsolutions.jts.geom.Geometry getJTS() {

                return Converter.geometryToJts(this);

        }

        public byte[] convertToWKB() throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                return (byte[]) this.invokeOperation(OPERATIONS.CONVERTTOWKB, null);

        }

        public byte[] convertToWKB(int srs) 

                throws GeometryOperationNotSupportedException, GeometryOperationException {

                int subType = getGeometryType().getSubType();

                boolean is3D = subType == 1 || subType == 3;

                WKBWriter write = null;

                if(is3D)

                        write = new WKBWriter(3);

                else

                        write = new WKBWriter(2);

                return write.write(Converter.geometryToJtsWithSRID(this, srs));

        }

        public byte[] convertToWKBForcingType(int srs, int type) 

                throws GeometryOperationNotSupportedException, GeometryOperationException {

                int subType = getGeometryType().getSubType();

                boolean is3D = subType == 1 || subType == 3;

                WKBWriter write = null;

                if(is3D)

                        write = new WKBWriter(3);

                else

                        write = new WKBWriter(2);

                return write.write(Converter.geometryToJtsWithSRIDForcingType(this, srs, type));

        }

        public String convertToWKT() throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                return (String) this.invokeOperation(OPERATIONS.CONVERTTOWKT, null);

        }

        public Geometry buffer(double distance)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                try {

                        return Converter.jtsToGeometry( getJTS().buffer(distance) );

                } catch (CreateGeometryException e) {

                        throw new GeometryOperationException(e);

                }

        }

        public boolean contains(Geometry geometry)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                return getJTS().contains(Converter.geometryToJts(geometry));

        }

        public double distance(Geometry geometry)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                return getJTS().distance( Converter.geometryToJts(geometry));

        }

        public Geometry snapTo(Geometry other, double snapTolerance)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                Geometry result = null;

                GeometrySnapper snapper = new GeometrySnapper(getJTS());

                com.vividsolutions.jts.geom.Geometry jts_result = snapper.snapTo(Converter.geometryToJts(other), snapTolerance);

                try {

                        result = Converter.jtsToGeometry(jts_result);

                } catch (CreateGeometryException e) {

                        throw new GeometryOperationException(e);

                }

                return result;

        }

        public boolean isWithinDistance(Geometry other, double distance)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                return DistanceOp.isWithinDistance(this.getJTS(), Converter.geometryToJts(other), distance);

        }

        public Geometry[] closestPoints(Geometry other)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                Geometry[] points = null;

                Coordinate[] jts_points = DistanceOp.closestPoints(this.getJTS(),

                                Converter.geometryToJts(other));

                points = new Point[jts_points.length];

                GeometryFactory geomFactory = new GeometryFactory();

                for (int n = 0; n < jts_points.length; n++) {

                        try {

                                points[n] = Converter.jtsToGeometry(geomFactory.createPoint(jts_points[n]));

                        } catch (CreateGeometryException e) {

                                throw new GeometryOperationException(e);

                        }

                }

                return points;

        }

        public boolean overlaps(Geometry geometry)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                return getJTS().overlaps(Converter.geometryToJts(geometry));

        }

        public Geometry convexHull() throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                try {

                        return Converter.jtsToGeometry( getJTS().convexHull() );

                } catch (CreateGeometryException e) {

                        throw new GeometryOperationException(e);

                }

        }

        public boolean coveredBy(Geometry geometry)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                return getJTS().coveredBy( Converter.geometryToJts(geometry));

        }

        public boolean covers(Geometry geometry)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                return getJTS().covers( Converter.geometryToJts(geometry));

        }

        public boolean crosses(Geometry geometry)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                return getJTS().crosses(Converter.geometryToJts(geometry));

        }

        public Geometry difference(Geometry other)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                try {

                        return Converter.jtsToGeometry( getJTS().difference( Converter.geometryToJts(other)) );

                } catch (CreateGeometryException e) {

                        throw new GeometryOperationException(e);

                }

        }

        public Geometry intersection(Geometry other)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                try {

                        Geometry geom = null;

                        com.vividsolutions.jts.geom.Geometry jtsgeom = getJTS().intersection(Converter.geometryToJts(other));

                        if( jtsgeom == null ) {

                                return null;

                        }

                        if( jtsgeom.isEmpty() ) {

                                return null;

                        }

                        geom = Converter.jtsToGeometry( jtsgeom );

                        return geom;

                } catch (CreateGeometryException e) {

                        throw new GeometryOperationException(e);

                }

        }

        public boolean intersects(Geometry geometry)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

            try {

                return getJTS().intersects(Converter.geometryToJts(geometry));

            } catch (Exception exc) {

                /*

                 * The JTS library sometimes throws an exception

                 * (Example: "TopologyException: side location conflict")

                 */

                throw new GeometryOperationException(exc);

            }

        }

        public boolean touches(Geometry geometry)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                return getJTS().touches(Converter.geometryToJts(geometry));

        }

        public Geometry union(Geometry other)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                try {

                        return Converter.jtsToGeometry( getJTS().union(Converter.geometryToJts(other)) );

                } catch (CreateGeometryException e) {

                        throw new GeometryOperationException(e);

                }

        }

        public boolean disjoint(Geometry geometry)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                return getJTS().disjoint(Converter.geometryToJts(geometry));

        }

        public boolean within(Geometry geometry)

                        throws GeometryOperationNotSupportedException,

                        GeometryOperationException {

                // TODO: this method can be implemented throw invokeOperation 

                return getJTS().within(Converter.geometryToJts(geometry));

        }

        public Point centroid() throws GeometryOperationNotSupportedException, GeometryOperationException {

                com.vividsolutions.jts.geom.Geometry geometry = getJTS();

                com.vividsolutions.jts.geom.Point point = geometry.getCentroid();

                GeometryOperationContext geometryOperationContext = new GeometryOperationContext();

                geometryOperationContext.setAttribute("JTSGeometry", point);

                return (Point)this.invokeOperation("fromJTS", geometryOperationContext);                

        }

        public Point getInteriorPoint() throws GeometryOperationNotSupportedException, GeometryOperationException {

            try {

                com.vividsolutions.jts.geom.Geometry geometry = getJTS();

                com.vividsolutions.jts.geom.Point point = geometry.getInteriorPoint();

                GeometryOperationContext geometryOperationContext = new GeometryOperationContext();

                geometryOperationContext.setAttribute("JTSGeometry", point);

                return (Point)this.invokeOperation("fromJTS", geometryOperationContext);

        } catch (GeometryOperationNotSupportedException ns_ex) {

            throw ns_ex;

        } catch (GeometryOperationException op_ex) {

            throw op_ex;

            } catch (Exception ex) {

                /*

                 * This is for unexpected null pointer exceptions or other

                 */

                throw new GeometryOperationException(ex);

            }

        }   

        public double area() throws GeometryOperationNotSupportedException, GeometryOperationException

    {

        //Using get getJTS method instead of use the "toJTS" operation just for performance

        return getJTS().getArea();

    }

    public double perimeter() throws GeometryOperationNotSupportedException, GeometryOperationException

    {

      //Using get getJTS method instead of use the "toJTS" operation just for performance

        return getJTS().getLength();

    }

    public Shape getShape() {

        return this;

    }  

    public Shape getShape(AffineTransform affineTransform) {

        if (affineTransform == null){

            return this;

        }

        GeneralPathX gp = getGeneralPath();

        if( gp==null ) {

            return null;

        }

        return new GeneralPathAdapter(affineTransform, gp);

    }     

    public void rotate(double radAngle, double basex, double basey) {

        AffineTransform at = new AffineTransform();

        at.rotate(radAngle,basex,basey);

        this.transform(at);

    }

    public void move(double dx, double dy) {

        AffineTransform at = new AffineTransform();

        at.translate(dx, dy);

        this.transform(at);

    }

    public void scale(Point basePoint, double sx, double sy) {

        AffineTransform at = new AffineTransform();

        at.setToTranslation(basePoint.getX(),basePoint.getY());

        at.scale(sx,sy);

        at.translate(-basePoint.getX(),-basePoint.getY());

        this.transform(at);

    }

    public Geometry makeValid() {

        try {

            ValidationStatus vs = this.getValidationStatus();

            if (vs.isValid()) {

                return this;

            }

            Geometry g = null;

            switch (vs.getStatusCode()) {

                case Geometry.ValidationStatus.RING_SELF_INTERSECTION:

                case Geometry.ValidationStatus.SELF_INTERSECTION:

                    g = this.buffer(0);

                    if (g.isValid()) {

                        return g;

                    }

                    break;

                case Geometry.ValidationStatus.TOO_FEW_POINTS:

                    if( this instanceof OrientableCurve ) {

                        int vertices = ((OrientableCurve)this).getNumVertices();

                        if( vertices<2 ) {

                            return new DefaultNullGeometry(this.getGeometryType());

                        }

                    }

                    if( this instanceof OrientableSurface ) {

                        int vertices = ((OrientableSurface)this).getNumVertices();

                        if( vertices<3 ) {

                            g = new DefaultNullGeometry(this.getGeometryType());

                            return g;

                        }

                    }

            }

        } catch (Exception ex) {

            return null;

        }

        return null;

    }

}

/*

Testing equality of Geometry objects

http://docs.geotools.org/stable/userguide/library/jts/equals.html

com.vividsolutions.jts.geom

Class Geometry

http://www.vividsolutions.com/jts/javadoc/com/vividsolutions/jts/geom/Geometry.html#normalize%28%29

*/