jtulach@287: package org.apidesign.friendpackage.impl;
jtulach@0: 
jtulach@0: import javax.swing.event.ChangeListener;
jtulach@287: import org.apidesign.friendpackage.api.Item;
jtulach@0: 
jtulach@0: /**
jtulach@0:  *
jtulach@0:  * @author Jaroslav Tulach
jtulach@0:  */
jtulach@3: // BEGIN: design.less.friend.Accessor
jtulach@0: public abstract class Accessor {
jtulach@128:     private static volatile Accessor DEFAULT;
jtulach@128:     public static Accessor getDefault() {
jtulach@128:         Accessor a = DEFAULT;
jtulach@286:         if (a == null) {
jtulach@286:             throw new IllegalStateException("Something is wrong: " + a);
jtulach@128:         }
jtulach@286:         return a;
jtulach@128:     }
jtulach@128: 
jtulach@128:     public static void setDefault(Accessor accessor) {
jtulach@128:         if (DEFAULT != null) {
jtulach@128:             throw new IllegalStateException();
jtulach@128:         }
jtulach@128:         DEFAULT = accessor;
jtulach@0:     }
jtulach@0:     
jtulach@0:     public Accessor() {
jtulach@0:     }
jtulach@0: 
jtulach@0:     protected abstract Item newItem();
jtulach@0:     protected abstract void addChangeListener(Item item, ChangeListener l);
jtulach@286: // FINISH: design.less.friend.Accessor
jtulach@286: 
jtulach@286:     // BEGIN: design.less.friend.InitAPI
jtulach@376:     private static final Class<?> INIT_API_CLASS = loadClass(
jtulach@376:         Item.class.getName()
jtulach@376:     );
jtulach@286:     private static Class<?> loadClass(String name) {
jtulach@286:         try {
jtulach@286:             return Class.forName(
jtulach@286:                 name, true, Accessor.class.getClassLoader()
jtulach@286:             );
jtulach@286:         } catch (Exception ex) {
jtulach@286:             throw new RuntimeException(ex);
jtulach@286:         }
jtulach@286:     }
jtulach@286:     // END: design.less.friend.InitAPI
jtulach@0: }