/*---------------- 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.portal.context;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.deegree.portal.PortalException;
/**
*
*
* @version $Revision: 1.9 $
* @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
*/
public class LayerList {
private HashMap layers = new HashMap();
private List list = new ArrayList();
/**
* Creates a new LayerList object.
*
* @param layers
*/
public LayerList( Layer[] layers ) {
setLayers( layers );
}
/**
* returns a layer identifies by its name
*
* @param name name ofthe layer
*
* @return
*/
public Layer getLayer( String name ) {
return (Layer)layers.get( name );
}
/**
* returns a layer identifies by its name
*
* @param name name ofthe layer
* @param serverAddress address of the server which servers the layer
*
* @return
*/
public Layer getLayer( String name, String serverAddress ) {
Layer layer = null;
int i = 0;
while ( i < list.size() && layer == null ) {
Layer tmp = (Layer)list.get( i );
String s = tmp.getServer().getOnlineResource().toExternalForm();
if ( tmp.getName().equals( name ) && s.equals( serverAddress ) ) {
layer = tmp;
}
i++;
}
return layer;
}
/**
* returns all layers of the web map context
*
* @return
*/
public Layer[] getLayers() {
Layer[] cl = new Layer[list.size()];
return (Layer[])list.toArray( cl );
}
/**
* sets all layers of the web map context
*
* @param layers
*/
public void setLayers( Layer[] layers ) {
this.layers.clear();
this.list.clear();
if ( layers != null ) {
for ( int i = 0; i < layers.length; i++ ) {
this.layers.put( layers[i].getName(), layers[i] );
list.add( layers[i] );
}
}
}
/**
* adds one layer to the the web map context. If a layer with the same
* name as the passed layer already exits it will be overwritten
*
* @param layer
*/
public void addLayer( Layer layer ) {
this.layers.put( layer.getName(), layer );
list.add( layer );
}
/**
* removes a layer identified by its name from the web map context
*
* @param name name of the layer to be removed
*
* @return
*/
public Layer removeLayer( String name ) {
Layer layer = (Layer)this.layers.remove( name );
list.remove( layer );
return layer;
}
/**
* moves a layer within the layer list up or down
* @param layer layer to be moved
* @param up if true the layer will be moved up otherwise
* it will be moved down
* @throws PortalException will be thrown if the layer is not known
* by the layer list.
*/
public void move(Layer layer, boolean up) {
int i = 0;
Layer target = null;
while ( i < list.size() && target == null ) {
Layer tmp = (Layer)list.get( i );
if ( tmp.getName().equals( layer.getName() ) &&
tmp.getServer().getOnlineResource().equals( layer.getServer().getOnlineResource() ) ) {
target = tmp;
}
i++;
}
i--;
if ( i > 0 && up ) {
Object o = list.get( i );
list.set( i, list.get( i-1 ) );
list.set( i-1, o );
} else if ( i < list.size()-1 && !up ) {
Object o = list.get( i );
list.set( i, list.get( i+1 ) );
list.set( i+1, o );
}
}
/**
* removes all layers from the web map context
*/
public void clear() {
this.layers.clear();
list.clear();
}
}
/* ********************************************************************
Changes to this class. What the people have been up to:
$Log: LayerList.java,v $
Revision 1.9 2006/07/12 14:46:15 poth
comment footer added
********************************************************************** */