/*
    * 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.commons.vfs2.provider.local;
  
  import java.io.File;
  import java.io.FilePermission;
  import java.util.Collection;
  
  import org.apache.commons.vfs2.Capability;
  import org.apache.commons.vfs2.FileName;
  import org.apache.commons.vfs2.FileObject;
  import org.apache.commons.vfs2.FileSelector;
  import org.apache.commons.vfs2.FileSystemException;
  import org.apache.commons.vfs2.FileSystemOptions;
  import org.apache.commons.vfs2.provider.AbstractFileName;
  import org.apache.commons.vfs2.provider.AbstractFileSystem;
  import org.apache.commons.vfs2.util.FileObjectUtils;
  
  /**
   * A local file system.
   */
  public class LocalFileSystem extends AbstractFileSystem {
  
      private final String rootFile;
  
      /**
       * Constructs a new instance.
       *
       * @param rootFileName The root file name of this file system.
       * @param rootFile The root of this file system.
       * @param fileSystemOptions Options to build this file system.
       */
      public LocalFileSystem(final FileName rootFileName, final String rootFile, final FileSystemOptions fileSystemOptions) {
          super(rootFileName, null, fileSystemOptions);
          this.rootFile = rootFile;
      }
  
      /**
       * Returns the capabilities of this file system.
       */
      @Override
      protected void addCapabilities(final Collection<Capability> caps) {
          caps.addAll(DefaultLocalFileProvider.capabilities);
      }
  
      /**
       * Creates a file object.
       */
      @Override
      protected FileObject createFile(final AbstractFileName name) throws FileSystemException {
          // Create the file
          return new LocalFile(this, rootFile, name);
      }
  
      /**
       * Creates a temporary local copy of a file and its descendants.
       */
      @Override
      protected File doReplicateFile(final FileObject fileObject, final FileSelector selector) throws Exception {
          final LocalFile localFile = (LocalFile) FileObjectUtils.getAbstractFileObject(fileObject);
          final File file = localFile.getLocalFile();
          final SecurityManager sm = System.getSecurityManager();
          if (sm != null) {
              sm.checkPermission(new FilePermission(file.getAbsolutePath(), "read"));
          }
          return file;
      }
  
  }