001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/branches/2.2_testing/src/org/deegree/graphics/Layer.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2008 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/deegree/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 This library is free software; you can redistribute it and/or
012 modify it under the terms of the GNU Lesser General Public
013 License as published by the Free Software Foundation; either
014 version 2.1 of the License, or (at your option) any later version.
015
016 This library is distributed in the hope that it will be useful,
017 but WITHOUT ANY WARRANTY; without even the implied warranty of
018 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
019 Lesser General Public License for more details.
020
021 You should have received a copy of the GNU Lesser General Public
022 License along with this library; if not, write to the Free Software
023 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024
025 Contact:
026
027 Andreas Poth
028 lat/lon GmbH
029 Aennchenstr. 19
030 53115 Bonn
031 Germany
032 E-Mail: poth@lat-lon.de
033
034 Prof. Dr. Klaus Greve
035 Department of Geography
036 University of Bonn
037 Meckenheimer Allee 166
038 53115 Bonn
039 Germany
040 E-Mail: greve@giub.uni-bonn.de
041
042
043 ---------------------------------------------------------------------------*/
044 package org.deegree.graphics;
045
046 import org.deegree.model.crs.CoordinateSystem;
047 import org.deegree.model.spatialschema.Envelope;
048
049 /**
050 * A Layer is a collection of <tt>Feature</tt>s or rasters building a thematic 'unit' waterways
051 * or country borders for example. <tt>Feature</tt>s or raster can be added or removed from the
052 * layer. A <tt>Feature</tt> or raster can e changed by a modul of the application using the layer
053 * because only references to <tt>Feature</tt>s or rasters are stored within a layer.
054 *
055 * <p>
056 * ------------------------------------------------------------------------
057 * </p>
058 *
059 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
060 * @version $Revision: 9340 $ $Date: 2007-12-27 13:32:12 +0100 (Do, 27 Dez 2007) $
061 */
062
063 public interface Layer {
064 /**
065 * returns the name of the layer
066 */
067 String getName();
068
069 /**
070 * returns the BoundingBox (Envelope) of Layer. This is the BoundingBox of the layers data. The
071 * BoundingBox of the View maybe larger or smaler
072 */
073 Envelope getBoundingBox();
074
075 /**
076 * returns the coordinate reference system of the MapView
077 *
078 */
079 CoordinateSystem getCoordinatesSystem();
080
081 /**
082 * sets the coordinate reference system of the MapView. If a new crs is set all geometries of
083 * GeometryFeatures will be transformed to the new coordinate reference system.
084 *
085 */
086 void setCoordinatesSystem( CoordinateSystem crs )
087 throws Exception;
088
089 /**
090 * adds an eventcontroller to the MapView that's reponsible for handling events that targets the
091 * map. E.g.: zooming, panning, selecting a feature etc.
092 */
093 void addEventController( LayerEventController obj );
094
095 /**
096 * @see Layer#addEventController(LayerEventController)
097 */
098 void removeEventController( LayerEventController obj );
099 }