/*
 *                 Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 *
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2003 Sun
 * Microsystems, Inc. All Rights Reserved.
 */

package org.netbeans.examples.modules.minicomposer.registryutils;

import org.netbeans.api.registry.*;
import org.netbeans.spi.looks.DefaultLook;
import org.netbeans.spi.looks.Look;
import org.openide.util.Lookup;
import org.openide.util.Mutex;

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

/**
 * Look representing a context with some typed items in it.
 * The children are just the items.
 */
public class DefaultContextLook extends DefaultLook implements ContextListener {

    private final String title;
    private final Class type;

    public DefaultContextLook(String title, Class type) {
        super("DefaultContextLook");
        this.type = type;
        this.title = title;
    }

    public String getDisplayName() {
        return title;
    }

    public void attachTo(Object o) {
        ((Context) o).addContextListener(this);
    }

    public void detachFrom(Object o) {
        ((Context) o).removeContextListener(this);
    }

    public String getDisplayName(Object o, Lookup l) {
        // XXX I18N?
        return "Choosing " + type.getName() + "'s";
    }

    public boolean isLeaf(Object o, Lookup l) {
        return false;
    }

    public List getChildObjects(Object o, Lookup l) {
        List items = new ArrayList(((Context) o).getOrderedObjects());
        Iterator it = items.iterator();
        while (it.hasNext()) {
            if (acceptChild(it.next())) {
                it.remove();
            }
        }
        return items;
    }

    protected final boolean acceptChild(Object o) {
        return !type.isInstance(o);
    }


    public void bindingChanged(BindingEvent evt) {
        final Context c = evt.getContext();
        Mutex.EVENT.writeAccess(new Runnable() {
            public void run() {
                fireChange(c, Look.GET_CHILD_OBJECTS);
            }
        });
    }

    public void subcontextChanged(SubcontextEvent evt) {
        // Ignore
    }

    public void attributeChanged(AttributeEvent evt) {
        // Ignore
    }
}