/*
    * 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.util.Arrays;
  import java.util.Collection;
  import java.util.Collections;
  
  import org.apache.commons.lang3.SystemUtils;
  import org.apache.commons.vfs2.Capability;
  import org.apache.commons.vfs2.FileName;
  import org.apache.commons.vfs2.FileObject;
  import org.apache.commons.vfs2.FileSystem;
  import org.apache.commons.vfs2.FileSystemException;
  import org.apache.commons.vfs2.FileSystemOptions;
  import org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider;
  import org.apache.commons.vfs2.provider.LocalFileProvider;
  import org.apache.commons.vfs2.provider.UriParser;
  
  /**
   * A file system provider, which uses direct file access.
   */
  public class DefaultLocalFileProvider extends AbstractOriginatingFileProvider implements LocalFileProvider {
  
      /** The provider's capabilities. */
      public static final Collection<Capability> capabilities = Collections.unmodifiableCollection(
              Arrays.asList(Capability.CREATE, Capability.DELETE, Capability.RENAME, Capability.GET_TYPE,
                      Capability.GET_LAST_MODIFIED, Capability.SET_LAST_MODIFIED_FILE,
                      Capability.SET_LAST_MODIFIED_FOLDER, Capability.LIST_CHILDREN, Capability.READ_CONTENT,
                      Capability.URI, Capability.WRITE_CONTENT, Capability.APPEND_CONTENT, Capability.RANDOM_ACCESS_READ,
                      Capability.RANDOM_ACCESS_SET_LENGTH, Capability.RANDOM_ACCESS_WRITE));
  
      /**
       * Constructs a new provider.
       */
      public DefaultLocalFileProvider() {
          if (SystemUtils.IS_OS_WINDOWS) {
              setFileNameParser(new WindowsFileNameParser());
          } else {
              setFileNameParser(new GenericFileNameParser());
          }
      }
  
      /**
       * Creates the file system.
       *
       * @return a new FileSystem, never null.
       */
      @Override
      protected FileSystem doCreateFileSystem(final FileName name, final FileSystemOptions fileSystemOptions)
              throws FileSystemException {
          // Create the file system
          final LocalFileName rootName = (LocalFileName) name;
          return new LocalFileSystem(rootName, rootName.getRootFile(), fileSystemOptions);
      }
  
      /**
       * Finds a local file.
       *
       * @param file The File to locate.
       * @return the located FileObject.
       * @throws FileSystemException if an error occurs.
       */
      @Override
      public FileObject findLocalFile(final File file) throws FileSystemException {
          return findLocalFile(UriParser.encode(file.getAbsolutePath()));
      }
  
      /**
       * Finds a local file, from its local name.
       *
       * @param name The name of the file to locate.
       * @return the located FileObject.
       * @throws FileSystemException if an error occurs.
       */
      @Override
      public FileObject findLocalFile(final String name) throws FileSystemException {
          final String scheme = "file:";
          final StringBuilder builder = new StringBuilder(name.length() + scheme.length());
          return findFile(parseUri(null, builder.append(scheme).append(name).toString()), null);
      }
  
      @Override
      public Collection<Capability> getCapabilities() {
         return capabilities;
     }
 
     /**
      * Determines if a name is an absolute file name.
      *
      * @param name The file name.
      * @return true if the name is absolute, false otherwise.
      */
     @Override
     public boolean isAbsoluteLocalName(final String name) {
         return ((LocalFileNameParser) getFileNameParser()).isAbsoluteName(name);
     }
 }