package org.gudy.azureus2.platform.macosx; /* * Created on 26-Mar-2005 * Created by James Yeh * Copyright (C) 2004-2005 Aelitis, All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * AELITIS, SAS au capital de 46,603.30 euros * 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France. * */ import java.io.File; /** * <p>Performs PlatformManager and platform-specific tasks using bridges like Cocoa-Java -> ObjC</p> * <p>The methods supplied are intended to reflect those that can be dealt with a way other than * OSAScript. Ensure that the method signatures match those of PlatformManagerImpl, but * they should generally return a boolean (false for failure).</p> * @version 1.0 */ public abstract class NativeInvocationBridge { private static NativeInvocationBridge instance; protected NativeInvocationBridge(){} /** * Gets the singleton * @return The NativeInvocationBridge singleton */ protected static final NativeInvocationBridge sharedInstance() { if (instance == null) { try { Object newInstance = Class.forName( "org.gudy.azureus2.platform.macosx.access.cocoa.CocoaJavaBridge").getConstructor().newInstance(); instance = (NativeInvocationBridge) newInstance; } catch (Throwable e) { //Debug.out(e); instance = new DummyBridge(); } } return instance; } protected final static boolean hasSharedInstance() { return instance != null; } /** * @see PlatformManager#performRecoverableFileDelete(java.io.File) */ protected boolean performRecoverableFileDelete(File path) {return false;} /** * @see PlatformManagerImpl#showInFinder(java.io.File) */ protected boolean showInFinder(File path, String fb) {return false;} /** * <p>Gets whether the invocation bridge is available for use</p> * <p>This method is used to anticipate scenarios such as where the bridge will fail due to missing classpaths</p> */ protected abstract boolean isEnabled(); /** * Disposes system resources */ protected void dispose(){} /** * A NativeInvocationBridge that does nothing; isEnabled() always returns false. */ private static class DummyBridge extends NativeInvocationBridge { @Override public boolean isEnabled() { return false; } } }