/*
* Geotoolkit - An Open Source Java GIS Toolkit
* http://www.geotoolkit.org
*
* (C) 2013, Geomatys
*
* 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;
* version 2.1 of the License.
*
* 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.
*/
package org.geotoolkit.display;
import java.util.ArrayList;
import java.util.List;
import org.geotoolkit.display.primitive.SceneNode;
/**
* Loops on all scene node, adding them in a list preserving the tree order.
*
* @author Johann Sorel (Geomatys)
*/
public final class FlattenVisitor implements SceneVisitor{
public static final FlattenVisitor ALL = new FlattenVisitor(false);
public static final FlattenVisitor ONLY_VISIBLE = new FlattenVisitor(true);
private final boolean onlyVisible;
private FlattenVisitor(boolean onlyVisible) {
this.onlyVisible = onlyVisible;
}
@Override
public List visit(SceneNode node, Object extraData) {
final List lst;
if(extraData instanceof List){
lst = (List)extraData;
}else{
lst = new ArrayList();
extraData = lst;
}
if(onlyVisible){
if(node.isVisible()){
lst.add(node);
for(SceneNode c : node.getChildren()){
c.accept(this, extraData);
}
}
}else{
lst.add(node);
for(SceneNode c : node.getChildren()){
c.accept(this, extraData);
}
}
return lst;
}
}