Class EmptyFileFilter

java.lang.Object
org.apache.commons.vfs2.filter.EmptyFileFilter
All Implemented Interfaces:
Serializable, FileFilter

public class EmptyFileFilter extends Object implements FileFilter, Serializable
This filter accepts files or directories that are empty.

If the File is a directory it checks that it contains no files.

Example, showing how to print out a list of the current directory's empty files/directories:

 FileSystemManager fsManager = VFS.getManager();
 FileObject dir = fsManager.toFileObject(new File("."));
 FileObject[] files = dir.findFiles(new FileFilterSelector(EmptyFileFilter.EMPTY));
 for (int i = 0; i < files.length; i++) {
     System.out.println(files[i]);
 }
 

Example, showing how to print out a list of the current directory's non-empty files/directories:

 FileSystemManager fsManager = VFS.getManager();
 FileObject dir = fsManager.toFileObject(new File("."));
 FileObject[] files = dir.findFiles(new FileFilterSelector(EmptyFileFilter.NOT_EMPTY));
 for (int i = 0; i < files.length; i++) {
     System.out.println(files[i]);
 }
 
Since:
2.4
See Also:
  • Field Details

    • serialVersionUID

      private static final long serialVersionUID
      See Also:
    • EMPTY

      public static final FileFilter EMPTY
      Singleton instance of empty filter.
    • NOT_EMPTY

      public static final FileFilter NOT_EMPTY
      Singleton instance of not-empty filter.
  • Constructor Details

    • EmptyFileFilter

      protected EmptyFileFilter()
      Restrictive constructor.
  • Method Details

    • accept

      public boolean accept(FileSelectInfo fileSelectInfo) throws FileSystemException
      Checks to see if the file is empty. A non-existing file is also considered empty.
      Specified by:
      accept in interface FileFilter
      Parameters:
      fileSelectInfo - the file or directory to check
      Returns:
      true if the file or directory is empty, otherwise false.
      Throws:
      FileSystemException - Thrown for file system errors.