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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  package org.apache.commons.vfs.provider.compressed;
    18
    19  import org.apache.commons.vfs.Capability;
    20  import org.apache.commons.vfs.FileName;
    21  import org.apache.commons.vfs.FileObject;
    22  import org.apache.commons.vfs.FileSystemException;
    23  import org.apache.commons.vfs.FileType;
    24  import org.apache.commons.vfs.provider.AbstractFileObject;
    25
    26  /***
    27   * A compressed file.<br>
    28   * Such a file do only have one child (the compressed filename with stripped last extension)
    29   *
    30   * @author <a href="mailto:imario@apache.org">Mario Ivankovits</a>
    31   * @version $Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Mi, 29 Nov 2006) $
    32   */
    33  public abstract class CompressedFileFileObject
    34      extends AbstractFileObject
    35      implements FileObject
    36  {
    37      private final FileObject container;
    38      private String[] children;
    39
    40      protected CompressedFileFileObject(FileName name, FileObject container, CompressedFileFileSystem fs)
    41      {
    42          super(name, fs);
    43          this.container = container;
    44
    45          // todo, add getBaseName(String) to FileName
    46          String basename = container.getName().getBaseName();
    47          int pos = basename.lastIndexOf('.');
    48          basename = basename.substring(0, pos);
    49
    50          children = new String[]
    51          {
    52              basename
    53          };
    54      }
    55
    56      /***
    57       * Determines if this file can be written to.
    58       *
    59       * @return <code>true</code> if this file is writeable, <code>false</code> if not.
    60       */
    61      public boolean isWriteable() throws FileSystemException
    62      {
    63          return getFileSystem().hasCapability(Capability.WRITE_CONTENT);
    64      }
    65
    66      /***
    67       * Returns the file's type.
    68       */
    69      protected FileType doGetType() throws FileSystemException
    70      {
    71          if (getName().getPath().endsWith("/"))
    72          {
    73              return FileType.FOLDER;
    74          }
    75          else
    76          {
    77              return FileType.FILE;
    78          }
    79      }
    80
    81      /***
    82       * Lists the children of the file.
    83       */
    84      protected String[] doListChildren()
    85      {
    86          return children;
    87      }
    88
    89      /***
    90       * Returns the size of the file content (in bytes).  Is only called if
    91       * {@link #doGetType} returns {@link FileType#FILE}.
    92       */
    93      protected long doGetContentSize()
    94      {
    95          return -1;
    96      }
    97
    98      /***
    99       * Returns the last modified time of this file.
    100      */
    101     protected long doGetLastModifiedTime() throws Exception
    102     {
    103         return container.getContent().getLastModifiedTime();
    104     }
    105
    106     protected FileObject getContainer()
    107     {
    108         return container;
    109     }
    110
    111     public void createFile() throws FileSystemException
    112     {
    113         container.createFile();
    114         injectType(FileType.FILE);
    115     }
    116 }