// XAAL toolkit
// Copyright (C) 2009 Ville Karavirta <vkaravir(a)cs.hut.fi>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
package xaal.objects.animation;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;

import xaal.objects.AddGraphicalOperation;
import xaal.objects.AddGraphicalPrimitive;
import xaal.objects.Xaal;
import xaal.objects.graphical.GraphicalPrimitive;
import xaal.util.EmptyIterator;

public class StructureOperation extends NarrativeOperation implements AddGraphicalPrimitive, AddGraphicalOperation{

    private List graphics;

    public StructureOperation(Xaal xaalDoc) {
        super(xaalDoc);
    }

    /**
     * @return Returns the graphics.
     */
    public Iterator getGraphicals() {
        if (graphics == null) {
            return new EmptyIterator();
        }
        return graphics.iterator();
    }
    
    /**
     * @param graphical The graphics to set.
     */
    public void setGraphical(List graphical) {
        this.graphics = graphical;
    }
    
    public void addGraphical(GraphicalPrimitive gp) {
        addGraphicalToList(gp);
    }
    
    public void addGraphical(GraphicalOperation go) {
        addGraphicalToList(go);
    }

    private void addGraphicalToList(Object o) {
        if (graphics == null)
            graphics = new ArrayList();
        graphics.add(o);
    }  
    
    public void apply(HashMap state) {
        Iterator i = getGraphicals();
        while(i != null && i.hasNext()) {
            Object o = i.next();
            if (o instanceof GraphicalOperation) {
                ((GraphicalOperation) o).apply(state);
            } else if (o instanceof GraphicalPrimitive) {
                GraphicalPrimitive gp = (GraphicalPrimitive) o;
                state.put(gp.getId(), gp);
            }               
        }
    }
}