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.Constructor;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryManager;

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

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

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

/**

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

 */

public class DefaultGeometryType extends AbstractGeometryType {

        /** 

         * 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;        

        /**

         * Super types of a geometry. e.g: the super type of an

         * arc is a curve, the super type of a circle is a surface...

         * The supertypes are defined in the ISO 19107 

         * 

         * @see <a href="http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=26012"

         * >ISO 19107< /a>

         */

        private int[] superTypes = null;

        /**

     * Super SubTypes of a geometry. e.g: the super SubType of a

     * geometry 3D is a geometry 2D, because the 3D extends the

     * behavior of a geometry 2D

     */

        private int[] superSubTypes = null;

    private Constructor constructor;

    private final Object[] parameters = { this };

        /**

     * 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    

     * @param superTypes

     * The superTypes of the geometry type

     * @param superSubTypes

     * The superSubtypes of the geometry type      

     */

    public DefaultGeometryType(Class geomClass, String name, int type, int subType, 

        int[] superTypes, int[] superSubTypes) {

        this.geometryClass = geomClass;

        if (name == null) {

            this.name = geomClass.getName();

        } else {

            this.name = name;

        }

        this.type = type;   

        this.subType = subType;

        this.superTypes = superTypes;

        this.superSubTypes = superSubTypes;

        Class[] parameterTypes = { GeometryType.class };

        try {

            constructor = geometryClass.getConstructor(parameterTypes);

        } catch (NoSuchMethodException e) {

            throw new RuntimeException(

                "Error constructor of the geometry class " + geomClass

                    + " with one parameter of type GeometryType not found", e);

        }

    }        

        /**

         * 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 type, int subType) {

                this(geomClass, name, type, subType, new int[0], new int[0]);

        }

        /**

         * 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 {

            return (Geometry) constructor.newInstance(parameters);

                } catch (Exception e) {

                        throw new CreateGeometryException(type, subType, e);

                } 

        }

        public Class getGeometryClass() {

                return geometryClass;

        }

        public String getName() {

                return name;

        }

        public int getType() {

                return type;

        }

        public int getSubType() {

                return subType;

        }

    public boolean isTypeOf(int geometryType) {

        if (type == geometryType){

            return true;

        }

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

            if(superTypes[i] == geometryType){

                return true;

            }

        }

        return Geometry.TYPES.GEOMETRY == geometryType;

    }

    public boolean isSubTypeOf(int geometrySubType) {

        if (subType == geometrySubType){

            return true;

        }

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

            if(superSubTypes[i] == geometrySubType){

                return true;

            }

        }

        return false;

    }

}