Application: gvSIG desktop

/* gvSIG. Geographic Information System of the Valencian Government

*

* Copyright (C) 2007-2008 Infrastructures and Transports Department

* of the Valencian Government (CIT)

* 

* 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 2

* 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.

* 

*/

/*

* AUTHORS (In addition to CIT):

* 2009 {Iver T.I.}   {Task}

*/

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

import java.lang.reflect.InvocationTargetException;

import java.util.ArrayList;

import java.util.List;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryManager;

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

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

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

/**

 * @author <a href="mailto:jpiera@gvsig.org">Jorge Piera</a>

 */

public class DefaultGeometryType implements GeometryType {

        /** 

         * The geometry identifier

         */

        private int id;

        /** 

         * Geometry type name

         */

        private String name;

        /** Class that implements this class type */

        private Class geometryClass;

        /**

         * The type of the geometry. The type is an abstract representation

         * of the object (Point, Curve...) but it is not a concrete 

         * representation (Point2D, Point3D...). To do that comparation

         * the id field is used.

         */

        private int type;

        /**

         * The subtype of the geometry. The subtype represents a set of 

         * geometries with a dimensional relationship (2D, 3D, 2DM...)

         */

        private int subType;

        /** Registered operations for a concrete geometry type */

        private List geometryOperations = new ArrayList();

        /**

         * This constructor is used by the {@link GeometryManager} when it

         * register a new GeometryType. It has not be used from other

         * parts.

         * @param geomClass

         * Geometry class (e.g: Point2D.class)

         * @param name

         * Symbolic Geometry name that is used to persist the geometry type. In some

         * cases, it is better to use this name because the id can change for different

         * application executions.                           

         * @param id

         * Geometry id        

         * @param typeName

         * The geometry type name

         * @param type

         * The geometry abstract type                        

         */

        public DefaultGeometryType(Class geomClass, String name, int id, int type, int subType) {

                this.geometryClass = geomClass;

                if (name == null) {

                        this.name = geomClass.getName();

                } else {

                        this.name = name;

                }

                this.id = id;                

                this.type = type;        

                this.subType = subType;

        }

        /**

         * This method creates a {@link Geometry} with the type specified 

         * by this GeometryType. The geometry has to have a constructor

         * without arguments.

         * 

         * @return A new geometry

         * @throws CreateGeometryException 

         */

        public Geometry create() throws CreateGeometryException{

                try {

                        Class[] parameterTypes = {GeometryType.class};

                        Object[] parameters = {this};

                        return (Geometry)geometryClass.getConstructor(parameterTypes).newInstance(parameters);

                } catch (Exception e) {

                        throw new CreateGeometryException(type, subType, e);

                } 

        }

        /**

         * Guardamos una referencia a una instancia de la operación en el índice que se pasa como parámetro.

         * Si el índice ya está ocupado se sobrescribe.

         * 

         * @param index

         * @param geomOp

         */

        public void setGeometryOperation(int index, GeometryOperation geomOp) {

                while (index > geometryOperations.size()) {

                        geometryOperations.add(null);

                }

                if (index == geometryOperations.size()) {

                        geometryOperations.add(geomOp);

                } else {                                

                        geometryOperations.set(index, geomOp);

                }

        }

        public GeometryOperation getGeometryOperation(int index) {

                return (GeometryOperation) geometryOperations.get(index);

        }

        public Class getGeometryClass() {

                return geometryClass;

        }

        public String toString() {

                StringBuffer sb = new StringBuffer("[")

                .append(geometryClass.getName())

                .append(",[")

                .append(geometryOperations.toString())

                .append("]");

                return sb.toString();

        }

        /* (non-Javadoc)

         * @see org.gvsig.fmap.geom.type.GeometryType#getId()

         */

        public int getId() {

                return id;

        }

        /* (non-Javadoc)

         * @see org.gvsig.fmap.geom.type.GeometryType#getName()

         */

        public String getName() {

                return name;

        }

        /* (non-Javadoc)

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

         */

        public int getType() {

                return type;

        }

        /* (non-Javadoc)

         * @see org.gvsig.fmap.geom.type.GeometryType#getSubType()

         */

        public int getSubType() {

                return subType;

        }

}