/*
* 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.sshd.common.file.virtualfs;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.sshd.common.Session;
import org.apache.sshd.common.file.FileSystemFactory;
import org.apache.sshd.common.file.FileSystemView;
import org.apache.sshd.common.file.nativefs.NativeFileSystemView;
/**
* SSHd file system factory to reduce the visibility to a physical folder.
*/
public class VirtualFileSystemFactory implements FileSystemFactory {
private String defaultHomeDir;
private final Map<String, String> homeDirs = new ConcurrentHashMap<String, String>();
public VirtualFileSystemFactory() {
}
public VirtualFileSystemFactory(String defaultHomeDir) {
this.defaultHomeDir = defaultHomeDir;
}
public void setDefaultHomeDir(String defaultHomeDir) {
this.defaultHomeDir = defaultHomeDir;
}
public String getDefaultHomeDir() {
return defaultHomeDir;
}
public void setUserHomeDir(String userName, String userHomeDir) {
homeDirs.put(userName, userHomeDir);
}
public String getUserHomeDir(String userName) {
return homeDirs.get(userName);
}
protected String computeRootDir(String userName) {
String homeDir = homeDirs.get(userName);
if (homeDir == null) {
homeDir = defaultHomeDir;
}
if (homeDir == null) {
throw new IllegalStateException("No home directory for user " + userName);
}
return homeDir;
}
public FileSystemView createFileSystemView(Session session) {
String dir = computeRootDir(session.getUsername());
Map<String, String> roots = new HashMap<String, String>();
roots.put("/", dir);
return new NativeFileSystemView(session.getUsername(), roots, "/", '/', false);
}
}