import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
+import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.Map;
import java.util.Set;
/**
* List of property set change event listeners.
*/
- private LinkedList propertySetEventListeners = null;
+ private Set propertySetEventListeners = null;
/**
* List of item set change event listeners.
*/
- private LinkedList itemSetEventListeners = null;
+ private Set itemSetEventListeners = null;
/**
* Item id that represents null selection of this select.
*/
public void addListener(Container.PropertySetChangeListener listener) {
if (propertySetEventListeners == null) {
- propertySetEventListeners = new LinkedList();
+ propertySetEventListeners = new LinkedHashSet();
}
propertySetEventListeners.add(listener);
}
*/
public void addListener(Container.ItemSetChangeListener listener) {
if (itemSetEventListeners == null) {
- itemSetEventListeners = new LinkedList();
+ itemSetEventListeners = new LinkedHashSet();
}
itemSetEventListeners.add(listener);
}