/*
 *                 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 Nokia. Portions Copyright 2003 Nokia.
 * All Rights Reserved.
 */

package org.netbeans.spi.enode;

import org.openide.filesystems.FileObject;

/**
 * Utility class with a static factory method. The factory
 * method should be called from the layer.
 * @author David Strupl
 */
public final class LookupContentFactoryManager {
    
    /**
     * No instances of this class should be created.
     */
    private LookupContentFactoryManager() {
    }
    
    /** 
     * This method is intended to be called from the layer
     * by means of the methodvalue file attribute. 
The following 
     * attributes of the file object are examined:
     *     
"implements" - comma delimited list of interfaces/classes
     *          that the resulting object implements. These are the
     *          only classes that are examined when someone asks the
     *          lookup
     *      
"factoryClass" - class on which the method newInstance
     *          is called to create the resulting object or lookup
     * @param FileObject must be from the system file system
     * @return LookupContentFactory usually wrapped in an utility wrapper
     *      that is used for passing the node argument in methods of LookupContentFactory
     *      and also as a performance optimalization in following sense: the class
     *      specified by the "factoryClass" attribute is not loaded until
     *      someone calls a lookup with argument containing a class from the list
     *      specified in the "implements" list
     */
    public static LookupContentFactory create(FileObject f) {
        return new org.netbeans.modules.enode.FactoryWrapper(f);
    }
    
}