How to use

DecoratedFileObject

in

org.apache.commons.vfs2.impl

 @Override
 public FileContent getContent() throws FileSystemException {
  return new DecoratedFileContent( super.getContent() ) {
   @Override public InputStream getInputStream() throws FileSystemException {
    return annotator.getInputStream( super.getInputStream(), annotationsFile.getContent().getInputStream() );
   }
  };
 }
}

@Override
public void close() throws FileSystemException
{
  synchronized (this)
  {
    super.close();
  }
}

@Override
public void copyFrom(final FileObject srcFile, final FileSelector selector) throws FileSystemException {
  synchronized (this) {
    super.copyFrom(srcFile, selector);
  }
}

  /**
   * Check if the given FileObject is instance of given class argument.
   *
   * @param fileObject The FileObject.
   * @param wantedClass The Class to check.
   * @return true if fileObject is an instance of the specified Class.
   * @throws FileSystemException if an error occurs.
   */
  public static boolean isInstanceOf(final FileObject fileObject, final Class<?> wantedClass)
      throws FileSystemException {
    Object searchObject = fileObject;
    while (searchObject instanceof DecoratedFileObject) {
      if (wantedClass.isInstance(searchObject)) {
        return true;
      }

      searchObject = ((DecoratedFileObject) searchObject).getDecoratedFileObject();
    }

    if (wantedClass.isInstance(searchObject)) {
      return true;
    }

    return false;
  }
}

@Override
public void findFiles(final FileSelector selector, final boolean depthwise, final List<FileObject> selected)
    throws FileSystemException {
  synchronized (this) {
    super.findFiles(selector, depthwise, selected);
  }
}

@Override
public int delete(final FileSelector selector) throws FileSystemException {
  synchronized (this) {
    return super.delete(selector);
  }
}

@Override
public FileObject getChild(final String name) throws FileSystemException {
  synchronized (this) {
    return super.getChild(name);
  }
}

@Override
public boolean exists() throws FileSystemException {
  synchronized (this) {
    return super.exists();
  }
}

@Override
public void createFolder() throws FileSystemException {
  synchronized (this) {
    super.createFolder();
  }
}

@Override
public void createFile() throws FileSystemException {
  synchronized (this) {
    super.createFile();
  }
}

  /**
   * Check if the given FileObject is instance of given class argument.
   *
   * @param fileObject The FileObject.
   * @param wantedClass The Class to check.
   * @return true if fileObject is an instance of the specified Class.
   * @throws FileSystemException if an error occurs.
   */
  public static boolean isInstanceOf(final FileObject fileObject, final Class<?> wantedClass)
      throws FileSystemException {
    Object searchObject = fileObject;
    while (searchObject instanceof DecoratedFileObject) {
      if (wantedClass.isInstance(searchObject)) {
        return true;
      }

      searchObject = ((DecoratedFileObject) searchObject).getDecoratedFileObject();
    }

    if (wantedClass.isInstance(searchObject)) {
      return true;
    }

    return false;
  }
}

@Override
public FileObject[] findFiles(final FileSelector selector) throws FileSystemException {
  synchronized (this) {
    return super.findFiles(selector);
  }
}

@Override
public boolean delete() throws FileSystemException {
  synchronized (this) {
    return super.delete();
  }
}

@Override
public FileObject getChild(final String name) throws FileSystemException {
  synchronized (this) {
    return super.getChild(name);
  }
}

@Override
public boolean exists() throws FileSystemException
{
  synchronized (this)
  {
    return super.exists();
  }
}

@Override
public void createFolder() throws FileSystemException {
  synchronized (this) {
    super.createFolder();
  }
}

@Override
public void createFile() throws FileSystemException {
  synchronized (this) {
    super.createFile();
  }
}

@Override
public FileContent getContent() throws FileSystemException {
  synchronized (this) {
    return super.getContent();
  }
}

  /**
   * Check if the given FileObject is instance of given class argument.
   *
   * @param fileObject The FileObject.
   * @param wantedClass The Class to check.
   * @return true if fileObject is an instance of the specified Class.
   * @throws FileSystemException if an error occurs.
   */
  public static boolean isInstanceOf(final FileObject fileObject, final Class<?> wantedClass)
      throws FileSystemException {
    Object searchObject = fileObject;
    while (searchObject instanceof DecoratedFileObject) {
      if (wantedClass.isInstance(searchObject)) {
        return true;
      }

      searchObject = ((DecoratedFileObject) searchObject).getDecoratedFileObject();
    }

    if (wantedClass.isInstance(searchObject)) {
      return true;
    }

    return false;
  }
}

@Override
public FileObject[] findFiles(final FileSelector selector) throws FileSystemException {
  synchronized (this) {
    return super.findFiles(selector);
  }
}