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package uk.org.ury.show;
import java.util.ArrayList;
import java.util.List;
import javax.swing.AbstractListModel;
import uk.org.ury.show.item.ShowItem;
/**
* A channel of ShowItems in a show.
*
* @author Matt Windsor
*/
public class ShowChannel extends AbstractListModel
{
/**
*
*/
private static final long serialVersionUID = -4651104185166068150L;
/* Items enqueued in channel. */
private List<ShowItem> items;
/**
* Construct a new, empty channel.
*/
public
ShowChannel ()
{
items = new ArrayList<ShowItem> ();
}
/**
* Add a new item to the channel.
*
* @param index The position at which to add the item.
*
* @param item The new item to add.
*
* @throws IllegalArgumentException if the item is
* null, the index is negative or the index
* is out of bounds.
*/
public void
add (int index, ShowItem item)
{
if (item == null)
throw new IllegalArgumentException ("Item is null.");
if (index < 0 || index >= items.size ())
throw new IllegalArgumentException ("Index " + index +
" out of bounds.");
items.add (index, item);
fireIntervalAdded (this, index, index);
}
/**
* Add a new item to the end of the channel.
*
* @param item The new item to add.
*/
public void
add (ShowItem item)
{
if (item == null)
throw new IllegalArgumentException ("Item is null.");
items.add (item);
fireIntervalAdded (this, items.size () - 1, items.size () - 1);
}
/**
* Retrieve an item from the channel.
*
* @param index The index of the item to retrieve from the channel.
*
* @return the item at the given index in the list.
*
* @throws IllegalArgumentException if the index is negative
* or overflowing.
*/
public ShowItem
get (int index)
{
if (index < 0 || index >= items.size ())
throw new IllegalArgumentException ("Index " + index +
" out of bounds.");
return items.get (index);
}
/**
* List model retrieval wrapper for get.
*
* @param index The index of the item to retrieve from the channel.
*
* @return the item at the given index in the list.
*/
@Override
public Object
getElementAt (int index)
{
return get (index);
}
/**
* @return the size of the list.
*/
@Override
public int
getSize ()
{
return items.size ();
}
}
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