    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/graphics/Layer.java $
    002    /*----------------------------------------------------------------------------
    003     This file is part of deegree, http://deegree.org/
    004     Copyright (C) 2001-2009 by:
    005       Department of Geography, University of Bonn
    006     and
    007       lat/lon GmbH
    008
    009     This library is free software; you can redistribute it and/or modify it under
    010     the terms of the GNU Lesser General Public License as published by the Free
    011     Software Foundation; either version 2.1 of the License, or (at your option)
    012     any later version.
    013     This library is distributed in the hope that it will be useful, but WITHOUT
    014     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    015     FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
    016     details.
    017     You should have received a copy of the GNU Lesser General Public License
    018     along with this library; if not, write to the Free Software Foundation, Inc.,
    019     59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    020
    021     Contact information:
    022
    023     lat/lon GmbH
    024     Aennchenstr. 19, 53177 Bonn
    025     Germany
    026     http://lat-lon.de/
    027
    028     Department of Geography, University of Bonn
    029     Prof. Dr. Klaus Greve
    030     Postfach 1147, 53001 Bonn
    031     Germany
    032     http://www.geographie.uni-bonn.de/deegree/
    033
    034     e-mail: info@deegree.org
    035    ----------------------------------------------------------------------------*/
    036    package org.deegree.graphics;
    037
    038    import org.deegree.model.crs.CoordinateSystem;
    039    import org.deegree.model.spatialschema.Envelope;
    040
    041    /**
    042     * A Layer is a collection of <tt>Feature</tt>s or rasters building a thematic 'unit' waterways
    043     * or country borders for example. <tt>Feature</tt>s or raster can be added or removed from the
    044     * layer. A <tt>Feature</tt> or raster can e changed by a modul of the application using the layer
    045     * because only references to <tt>Feature</tt>s or rasters are stored within a layer.
    046     *
    047     * <p>
    048     * ------------------------------------------------------------------------
    049     * </p>
    050     *
    051     * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
    052     * @version $Revision: 18195 $ $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
    053     */
    054
    055    public interface Layer {
    056        /**
    057         * returns the name of the layer
    058         * @return the name of the layer
    059         */
    060        String getName();
    061
    062        /**
    063         * returns the BoundingBox (Envelope) of Layer. This is the BoundingBox of the layers data. The
    064         * BoundingBox of the View maybe larger or smaler
    065         * @return the BoundingBox (Envelope) of Layer
    066         */
    067        Envelope getBoundingBox();
    068
    069        /**
    070         * returns the coordinate reference system of the MapView
    071         * @return the coordinate reference system of the MapView
    072         *
    073         */
    074        CoordinateSystem getCoordinatesSystem();
    075
    076        /**
    077         * sets the coordinate reference system of the MapView. If a new crs is set all geometries of
    078         * GeometryFeatures will be transformed to the new coordinate reference system.
    079         * @param crs to set
    080         * @throws Exception if something went wrong
    081         *
    082         */
    083        void setCoordinatesSystem( CoordinateSystem crs )
    084                                throws Exception;
    085
    086        /**
    087         * adds an eventcontroller to the MapView that's responsible for handling events that targets the
    088         * map. E.g.: zooming, panning, selecting a feature etc.
    089         * @param obj an event controller
    090         */
    091        void addEventController( LayerEventController obj );
    092
    093        /**
    094         * @param obj the eventcontroller to remove
    095         * @see Layer#addEventController(LayerEventController)
    096         */
    097        void removeEventController( LayerEventController obj );
    098    }