001: //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/trunk/src/org/deegree/graphics/AbstractLayer.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 java.util.ArrayList;
047: import java.util.Collections;
048: import java.util.List;
049:
050: import org.deegree.model.crs.CRSFactory;
051: import org.deegree.model.crs.CoordinateSystem;
052: import org.deegree.model.spatialschema.Envelope;
053: import org.deegree.model.spatialschema.GeometryFactory;
054:
055: /**
056: * A Layer is a collection of <tt>Feature</tt>s or rasters building a thematic 'unit' waterways
057: * or country borders for example. <tt>Feature</tt>s or raster can be added or removed from the
058: * layer. A <tt>Feature</tt> or raster can e changed by a modul of the application using the layer
059: * because only references to <tt>Feature</tt>s or rasters are stored within a layer.
060: *
061: *
062: * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
063: * @version $Revision: 9340 $ $Date: 2007-12-27 04:32:12 -0800 (Thu, 27 Dec 2007) $
064: */
065:
066: abstract class AbstractLayer implements Layer {
067:
068: protected CoordinateSystem cs = null;
069:
070: protected Envelope boundingbox = null;
071:
072: protected List<EventController> eventController = Collections
073: .synchronizedList(new ArrayList<EventController>());
074:
075: private String name = null;
076:
077: /**
078: * creates a layer with EPSG:4326 as default coordinate system
079: *
080: * @param name
081: * @throws Exception
082: */
083: AbstractLayer(String name) throws Exception {
084: this .name = name;
085: cs = CRSFactory.create("EPSG:4326");
086:
087: }
088:
089: /**
090: * Creates a new AbstractLayer object.
091: *
092: * @param name
093: * @param crs
094: *
095: * @throws Exception
096: */
097: AbstractLayer(String name, CoordinateSystem crs) throws Exception {
098: this .name = name;
099:
100: cs = crs;
101:
102: boundingbox = GeometryFactory.createEnvelope(9E99, 9E99, -9E99,
103: -9E99, null);
104: }
105:
106: /**
107: * returns the name of the layer
108: *
109: * @return the name of the layer
110: */
111: public String getName() {
112: return name;
113: }
114:
115: /**
116: * returns the BoundingBox (Envelope) of Layer. This is the BoundingBox of the layers data. The
117: * BoundingBox of the View maybe larger or smaller
118: *
119: * @return the BoundingBox (Envelope) of Layer
120: */
121: public Envelope getBoundingBox() {
122: return boundingbox;
123: }
124:
125: /**
126: * returns the coordinate reference system of the MapView
127: *
128: * @return the coordinate reference system of the MapView
129: */
130: public CoordinateSystem getCoordinatesSystem() {
131: return cs;
132: }
133:
134: /**
135: * adds an eventcontroller to the MapView that's reponsible for handling events that targets the
136: * map. E.g.: zooming, panning, selecting a feature etc.
137: *
138: * @param obj
139: */
140: public void addEventController(LayerEventController obj) {
141: eventController.add(obj);
142: obj.addLayer(this );
143: }
144:
145: /**
146: * @see org.deegree.graphics.AbstractLayer#addEventController(LayerEventController)
147: * @param obj
148: */
149: public void removeEventController(LayerEventController obj) {
150: eventController.remove(obj);
151: obj.removeLayer(this);
152: }
153: }
|