gov/nasa/worldwind/LayerList.java

   1 package gov.nasa.worldwind;
   2
   3 /*
   4 Copyright (C) 2001, 2006 United States Government
   5 as represented by the Administrator of the
   6 National Aeronautics and Space Administration.
   7 All Rights Reserved.
   8 */
   9
  10 /**
  11  * @author Tom Gaskins
  12  * @version $Id: LayerList.java 1467 2007-04-14 01:24:51Z tgaskins $
  13  */
  14 public class LayerList extends WWObjectImpl implements Iterable<Layer>
  15 {
  16     private java.util.List<Layer> layerList = new java.util.ArrayList<Layer>();
  17
  18     public LayerList()
  19     {
  20     }
  21
  22     public LayerList(Layer[] layers)
  23     {
  24         if (layers == null)
  25         {
  26             String message = WorldWind.retrieveErrMsg("nullValue.LayersIsNull");
  27             WorldWind.logger().log(java.util.logging.Level.FINE, message);
  28             throw new IllegalArgumentException(message);
  29         }
  30         for (Layer layer : layers)
  31         {
  32             this.add(layer);
  33         }
  34     }
  35
  36     public void add(Layer layer)
  37     {
  38         if (layer == null)
  39         {
  40             String message = WorldWind.retrieveErrMsg("nullValue.LayerIsNull");
  41             WorldWind.logger().log(java.util.logging.Level.FINE, message);
  42             throw new IllegalArgumentException(message);
  43         }
  44
  45         if (this.layerList.contains(layer))
  46             return;
  47
  48         this.layerList.add(layer);
  49         layer.addPropertyChangeListener(this);
  50         this.firePropertyChange(AVKey.LAYERS, null, this.layerList); // TODO: send old layer list content
  51     }
  52
  53     public void remove(Layer layer)
  54     {
  55         if (layer == null)
  56         {
  57             String msg = WorldWind.retrieveErrMsg("nullValue.LayerIsNull");
  58             WorldWind.logger().log(java.util.logging.Level.FINE, msg);
  59             throw new IllegalArgumentException(msg);
  60         }
  61
  62         if (!this.layerList.contains(layer))
  63             return;
  64
  65         layer.removePropertyChangeListener(this);
  66         this.layerList.remove(layer);
  67         this.firePropertyChange(AVKey.LAYERS, null, this.layerList); // TODO: send old layer list content
  68     }
  69
  70     public java.util.Iterator<Layer> iterator()
  71     {
  72         return this.layerList.iterator();
  73     }
  74
  75     public int getSize()
  76     {
  77         return this.layerList.size();
  78     }
  79
  80     @Override
  81     public String toString()
  82     {
  83         String r = "";
  84         for (Layer l : this.layerList)
  85         {
  86             r += l.toString() + ", ";
  87         }
  88         return r;
  89     }
  90 }