| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.geronimo.gshell.vfs; |
| |
| import org.apache.commons.vfs.FileObject; |
| import org.apache.commons.vfs.FileSystemException; |
| import org.apache.commons.vfs.FileSystemManager; |
| import org.apache.commons.vfs.provider.DelegateFileObject; |
| import org.apache.commons.vfs.provider.local.LocalFile; |
| import org.apache.geronimo.gshell.command.Variables; |
| import org.apache.geronimo.gshell.shell.ShellContextHolder; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.lang.reflect.Field; |
| |
| /** |
| * {@link FileSystemAccess} component. |
| * |
| * @version $Rev$ $Date$ |
| */ |
| public class FileSystemAccessImpl |
| implements FileSystemAccess |
| { |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private final FileSystemManager fileSystemManager; |
| |
| public FileSystemAccessImpl(final FileSystemManager fileSystemManager) { |
| assert fileSystemManager != null; |
| this.fileSystemManager = fileSystemManager; |
| } |
| |
| public FileSystemManager getManager() { |
| return fileSystemManager; |
| } |
| |
| public FileObject getCurrentDirectory(final Variables vars) throws FileSystemException { |
| assert vars != null; |
| |
| FileObject cwd = null; |
| |
| Object var = vars.get(CWD); |
| if (var instanceof String) { |
| log.trace("Resolving CWD from string: {}", var); |
| |
| cwd = getManager().resolveFile((String)var); |
| } |
| else if (var instanceof FileObject) { |
| cwd = (FileObject)var; |
| } |
| else if (var != null) { |
| throw new RuntimeException("Invalid variable type for '" + CWD + "'; expected String or FileObject; found: " + var.getClass()); |
| } |
| |
| if (cwd == null) { |
| log.trace("CWD not set, resolving from user.dir"); |
| |
| // TODO: May need to ask the Application for this, as it might be different depending on the context (ie. remote user, etc) |
| String userDir = "file://" + System.getProperty("user.dir"); |
| cwd = getManager().resolveFile(userDir); |
| } |
| |
| return cwd; |
| } |
| |
| public FileObject getCurrentDirectory() throws FileSystemException { |
| log.trace("Resolving CWD from application variables"); |
| |
| return getCurrentDirectory(ShellContextHolder.get().getVariables()); |
| } |
| |
| public void setCurrentDirectory(final Variables vars, final FileObject dir) throws FileSystemException { |
| assert vars != null; |
| assert dir != null; |
| |
| log.trace("Setting CWD: {}", dir); |
| |
| // Make sure that the given file object exists and is really a directory |
| if (!dir.exists()) { |
| throw new RuntimeException("Directory not found: " + dir.getName()); |
| } |
| else if (!dir.getType().hasChildren()) { |
| throw new RuntimeException("File can not contain children: " + dir.getName()); |
| } |
| |
| vars.parent().set(CWD, dir); |
| } |
| |
| public void setCurrentDirectory(final FileObject dir) throws FileSystemException { |
| assert dir != null; |
| |
| log.trace("Setting CWD to application variables"); |
| |
| setCurrentDirectory(ShellContextHolder.get().getVariables(), dir); |
| } |
| |
| public FileObject resolveFile(final FileObject baseFile, final String name) throws FileSystemException { |
| FileObject f = getManager().resolveFile(baseFile, name); |
| FileObject d = dereference(f); |
| if (d != null) { |
| d.refresh(); |
| } |
| return f; |
| } |
| |
| public FileObject resolveFile(final String name) throws FileSystemException { |
| FileObject f = getManager().resolveFile(getCurrentDirectory(), name); |
| FileObject d = dereference(f); |
| if (d != null) { |
| d.refresh(); |
| } |
| return f; |
| } |
| |
| public boolean isLocalFile(final FileObject file) { |
| return file instanceof LocalFile; |
| } |
| |
| public File getLocalFile(final FileObject file) throws FileSystemException { |
| if (!isLocalFile(file)) { |
| throw new FileSystemException("Unable to get local file from: " + file.getClass()); |
| } |
| |
| try { |
| file.refresh(); |
| Field field = LocalFile.class.getDeclaredField("file"); |
| |
| try { |
| return (File)field.get(file); |
| } |
| catch (IllegalAccessException ignore) { |
| // try again |
| field.setAccessible(true); |
| return (File)field.get(file); |
| } |
| } |
| catch (Exception e) { |
| throw new FileSystemException(e); |
| } |
| } |
| |
| // |
| // HACK: dereference() is only here because the DelegateFileObject impl is kinda broken. |
| // |
| |
| public FileObject dereference(final FileObject file) throws FileSystemException { |
| assert file != null; |
| |
| if (file instanceof DelegateFileObject) { |
| try { |
| file.refresh(); |
| Field field = DelegateFileObject.class.getDeclaredField("file"); |
| |
| try { |
| return (FileObject)field.get(file); |
| } |
| catch (IllegalAccessException ignore) { |
| // try again |
| field.setAccessible(true); |
| return (FileObject)field.get(file); |
| } |
| } |
| catch (Exception e) { |
| throw new FileSystemException(e); |
| } |
| } |
| |
| return file; |
| } |
| |
| public FileObject createVirtualFileSystem(final String rootUri) throws FileSystemException { |
| assert rootUri != null; |
| FileObject file = getManager().resolveFile(rootUri); |
| return getManager().createVirtualFileSystem(file); |
| } |
| |
| public FileObject createVirtualFileSystem(final FileObject rootFile) throws FileSystemException { |
| assert rootFile != null; |
| return getManager().createVirtualFileSystem(rootFile); |
| } |
| |
| } |