| gvSIG desktop 1

package org.gvsig.fmap.geom.type;

import org.gvsig.fmap.geom.Geometry;

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

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

/**

 * This class represents the type of a geometry. All the geometries

 * has to have a type that can be retrieved using the 

 * {@link Geometry}{@link #getGeometryType()} method.

 * 

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

 */

public interface GeometryType {

        /**

         * @return the name of the geometry type.

         */

        public String getName();

        /**

         * @return the type of the geometry. It is a constant value

         * that has to be one of the values in {@link Geometry.TYPES}

         * The type is an abstract representation of the object (Point, Curve...) 

         * but it is not a concrete representation (Point2D, Point3D...). 

         */

        public int getType();        

        /**

         * @return the subtype of the geometry. It is a constant value

         * that has to be one of the values in {@link Geometry.SUBTYPES}.

         * The subtype represents a set of geometries with a 

         * dimensional relationship (2D, 3D, 2DM...)

         */

        public int getSubType();

        /**

         * Check if a geometry type inherits of other type. E.g:

         * the super type of an arc could be a a curve, the super 

         * type of a circle could be a surface...

         * @param geometryType

         * the value of the {@link Geometry.TYPES} to check if is 

         * it super type

         * @return

         * <true> if the the parameter is a super type of this

         * geometry type

         */

        public boolean isTypeOf(int geometryType);

        /**

     * Check if a geometry subType inherits of other subType. E.g:

     * the super Subtype of a geometry 3D could be a geometry 2D, 

     * because the 3D extends the behavior of a geometry 2D.

     * @param geometrySubType

     * the value of the {@link Geometry.SUBTYPES} to check if is 

     * it super subType

     * @return

     * <true> if the the parameter is a super subType of this

     * geometry type

     */

        public boolean isSubTypeOf(int geometrySubType);

    /**

     * Check if a geometry type inherits of other type. E.g:

     * the super type of an arc could be a a curve, the super

     * type of a circle could be a surface...

     * 

     * @param geometryType

     *            the geometry type to check if is it super type

     * @return

     *         if the the parameter is a super type of this

     *         geometry type

     */

    public boolean isTypeOf(GeometryType geometryType);

    /**

     * Check if a geometry subType inherits of other subType. E.g:

     * the super Subtype of a geometry 3D could be a geometry 2D,

     * because the 3D extends the behavior of a geometry 2D.

     * 

     * @param geometryType

     *            the geometry type to check if is it super subtype

     * @return

     *         if the the parameter is a super subType of this

     *         geometry type

     */

    public boolean isSubTypeOf(GeometryType geometryType);

        /**

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

         * by this class. The geometry is empty, and all the internal 

         * attributes must be assigned to a value when the geometry has  

         * been created.

         * 

         * @return

         * A empty geometry 

         * @throws InstantiationException

         * This exception is maybe thrown when  the application is  trying 

         * to instantiate the geometry

         * @throws IllegalAccessException

         * This exception is maybe thrown when  the application is  trying 

         * to instantiate the geometry

         */

        public Geometry create() throws CreateGeometryException;

        /**

         * Registers an operation for this geometry type. 

         * @param index

         * @param geomOp

         */

        public void setGeometryOperation(int index, GeometryOperation geomOp);

        /**

         * Get the operation for this geometry at a concrete position

         * @param index

         * The position of the operation

         * @return

         * A geometry operation

         */

        public GeometryOperation getGeometryOperation(int index);

        /**

         * @return the geometry as a String

         */

        public String toString();

}