Layer.java example

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/*----------------    FILE HEADER  ------------------------------------------

This file is part of deegree.
Copyright (C) 2001-2006 by:
EXSE, Department of Geography, University of Bonn
http://www.giub.uni-bonn.de/deegree/
lat/lon GmbH
http://www.lat-lon.de

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

Contact:

Andreas Poth
lat/lon GmbH
Aennchenstr. 19
53115 Bonn
Germany
E-Mail: poth@lat-lon.de

Prof. Dr. Klaus Greve
Department of Geography
University of Bonn
Meckenheimer Allee 166
53115 Bonn
Germany
E-Mail: greve@giub.uni-bonn.de

                 
 ---------------------------------------------------------------------------*/
package org.deegree.graphics;

import org.deegree.model.crs.CoordinateSystem;
import org.deegree.model.spatialschema.Envelope;

/**
 * A Layer is a collection of <tt>Feature</tt>s or rasters building a thematic
 * 'unit' waterways or country borders for example. <tt>Feature</tt>s or raster
 * can be added or removed from the layer. A <tt>Feature</tt> or raster can e 
 * changed by a modul of the application using the layer because only references 
 * to <tt>Feature</tt>s or rasters are stored within a layer.
 * 
 * <p>------------------------------------------------------------------------</p>
 * 
 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
 * @version $Revision: 1.7 $ $Date: 2006/07/04 18:30:04 $
 */

public interface Layer {
    /**
     * returns the name of the layer
     */
    String getName();
          
    /**
     * returns the BoundingBox (Envelope) of Layer. This is the BoundingBox of
     * the layers data. The BoundingBox of the View maybe larger or smaler
     */
    Envelope getBoundingBox();

    /**
     * returns the coordinate reference system of the MapView
     * 
     */
    CoordinateSystem getCoordinatesSystem();

    /**
     * sets the coordinate reference system of the MapView. If a new crs is set
     * all geometries of GeometryFeatures will be transformed to the 
     * new coordinate reference system.
     * 
     */
    void setCoordinatesSystem(CoordinateSystem crs) throws Exception;

    /**
     * adds an eventcontroller to the MapView that's reponsible for handling
     * events that targets the map. E.g.: zooming, panning, selecting a feature etc.
     */
    void addEventController( LayerEventController obj );

    /**
     * @see Layer#addEventController(LayerEventController)
     */
    void removeEventController( LayerEventController obj );
}
/* ********************************************************************
Changes to this class. What the people have been up to:
$Log: Layer.java,v $
Revision 1.7  2006/07/04 18:30:04  poth
footer added


********************************************************************** */