/*
 *                 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 1997-2002 Sun
 * Microsystems, Inc. All Rights Reserved.
 */
package org.netbeans.modules.java.platform;

import org.netbeans.api.java.platform.JavaPlatform;
import org.openide.filesystems.*;
import org.openide.cookies.InstanceCookie;
import org.openide.ErrorManager;
import org.openide.loaders.DataObject;

import java.util.*;
import java.io.IOException;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import org.openide.util.Lookup;

public class DefaultJavaPlatformProvider implements JavaPlatformProvider, FileChangeListener {

    private static final String PLATFORM_STORAGE = "Services/Platforms/org-netbeans-api-java-Platform";  //NOI18N

    private HashSet listeners;
    private FileObject storage;
    private JavaPlatform defaultPlatform;

    public DefaultJavaPlatformProvider () {
        storage = Repository.getDefault().getDefaultFileSystem().findResource(PLATFORM_STORAGE);
        if (storage == null) {
            // Turn this off since it can confuse unit tests running w/o layer merging.
            //assert false : "Cannot find platforms storage";
        }
        else {
            storage.addFileChangeListener (this);
        }
    }

    public JavaPlatform[] getInstalledPlatforms() {
        List platforms = new ArrayList ();
        if (storage != null) {
            try {
                FileObject[] platfomDefinitions = storage.getChildren();
                for (int i=0; i