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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.bzip2;
    18
    19  //TODO: Revert to [compress]
    20  //import org.apache.commons.compress.bzip2.CBZip2InputStream;
    21  //import org.apache.commons.compress.bzip2.CBZip2OutputStream;
    22  import org.apache.commons.vfs.FileName;
    23  import org.apache.commons.vfs.FileObject;
    24  import org.apache.commons.vfs.FileSystemException;
    25  import org.apache.commons.vfs.provider.compressed.CompressedFileFileObject;
    26  import org.apache.commons.vfs.provider.compressed.CompressedFileFileSystem;
    27
    28  import java.io.IOException;
    29  import java.io.InputStream;
    30  import java.io.OutputStream;
    31
    32  /***
    33   * the bzip2 file
    34   *
    35   * @author <a href="mailto:imario@apache.org">Mario Ivankovits</a>
    36   * @version $Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Mi, 29 Nov 2006) $
    37   */
    38  public class Bzip2FileObject extends CompressedFileFileObject
    39  {
    40      protected Bzip2FileObject(FileName name, FileObject container, CompressedFileFileSystem fs)
    41      {
    42          super(name, container, fs);
    43      }
    44
    45      protected InputStream doGetInputStream() throws Exception
    46      {
    47          // check file
    48          InputStream is = getContainer().getContent().getInputStream();
    49          return wrapInputStream(getName().getURI(), is);
    50      }
    51
    52      public static InputStream wrapInputStream(final String name, final InputStream is) throws IOException
    53      {
    54          final int b1 = is.read();
    55          final int b2 = is.read();
    56          if (b1 != 'B' || b2 != 'Z')
    57          {
    58              throw new FileSystemException("vfs.provider.compressedFile/not-a-compressedFile-file.error", name);
    59          }
    60          return new CBZip2InputStream(is);
    61      }
    62
    63      protected OutputStream doGetOutputStream(boolean bAppend) throws Exception
    64      {
    65          OutputStream os = getContainer().getContent().getOutputStream(false);
    66          os.write('B');
    67          os.write('Z');
    68
    69          return new CBZip2OutputStream(os);
    70      }
    71  }