| /* |
| * Copyright 2002-2005 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.vfs; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| |
| /** |
| * The main entry point for the VFS. Used to create {@link FileSystemManager} |
| * instances. |
| * |
| * @author <a href="mailto:adammurdoch@apache.org">Adam Murdoch</a> |
| * @version $Revision$ $Date$ |
| */ |
| public class VFS |
| { |
| private static FileSystemManager instance; |
| |
| private VFS() |
| { |
| } |
| |
| /** |
| * Returns the default {@link FileSystemManager} instance. |
| */ |
| public static synchronized FileSystemManager getManager() |
| throws FileSystemException |
| { |
| if (instance == null) |
| { |
| instance = createManager("org.apache.commons.vfs.impl.StandardFileSystemManager"); |
| } |
| return instance; |
| } |
| |
| /** |
| * Creates a file system manager instance. |
| */ |
| private static FileSystemManager createManager(final String managerClassName) |
| throws FileSystemException |
| { |
| try |
| { |
| // Create instance |
| final Class mgrClass = Class.forName(managerClassName); |
| final FileSystemManager mgr = (FileSystemManager) mgrClass.newInstance(); |
| |
| /* |
| try |
| { |
| // Set the logger |
| final Method setLogMethod = mgrClass.getMethod("setLogger", new Class[]{Log.class}); |
| final Log logger = LogFactory.getLog(VFS.class); |
| setLogMethod.invoke(mgr, new Object[]{logger}); |
| } |
| catch (final NoSuchMethodException e) |
| { |
| // Ignore; don't set the logger |
| } |
| */ |
| |
| try |
| { |
| // Initialise |
| final Method initMethod = mgrClass.getMethod("init", null); |
| initMethod.invoke(mgr, null); |
| } |
| catch (final NoSuchMethodException e) |
| { |
| // Ignore; don't initialize |
| } |
| |
| return mgr; |
| } |
| catch (final InvocationTargetException e) |
| { |
| throw new FileSystemException("vfs/create-manager.error", |
| managerClassName, |
| e.getTargetException()); |
| } |
| catch (final Exception e) |
| { |
| throw new FileSystemException("vfs/create-manager.error", |
| managerClassName, |
| e); |
| } |
| } |
| } |