Package org.apache.commons.io.filefilter

Class SizeFileFilter

  • All Implemented Interfaces:
    FileFilter, FilenameFilter, Serializable, FileVisitor<Path>, PathFilter, PathVisitor, IOFileFilter
    public class SizeFileFilter
extends AbstractFileFilter
implements Serializable
    Filters files based on size, can filter either smaller files or files equal to or larger than a given threshold.

    For example, to print all files and directories in the current directory whose size is greater than 1 MB:

    Using Classic IO

     File dir = new File(".");
 String[] files = dir.list(new SizeFileFilter(1024 * 1024));
 for (String file : files) {
     System.out.println(file);
 }

    Using NIO

     final Path dir = Paths.get("");
 final AccumulatorPathVisitor visitor = AccumulatorPathVisitor.withLongCounters(new SizeFileFilter(1024 * 1024));
 //
 // Walk one dir
 Files.walkFileTree(dir, Collections.emptySet(), 1, visitor);
 System.out.println(visitor.getPathCounters());
 System.out.println(visitor.getFileList());
 //
 visitor.getPathCounters().reset();
 //
 // Walk dir tree
 Files.walkFileTree(dir, visitor);
 System.out.println(visitor.getPathCounters());
 System.out.println(visitor.getDirList());
 System.out.println(visitor.getFileList());
    Since:
    1.2
    See Also:
    FileFilterUtils.sizeFileFilter(long), FileFilterUtils.sizeFileFilter(long, boolean), FileFilterUtils.sizeRangeFileFilter(long, long), Serialized Form

    • Constructor Detail

      • SizeFileFilter

        public SizeFileFilter​(long size)
        Constructs a new size file filter for files equal to or larger than a certain size.
        Parameters:
        size - the threshold size of the files
        Throws:
        IllegalArgumentException - if the size is negative

      • SizeFileFilter

        public SizeFileFilter​(long size,
                      boolean acceptLarger)
        Constructs a new size file filter for files based on a certain size threshold.
        Parameters:
        size - the threshold size of the files
        acceptLarger - if true, files equal to or larger are accepted, otherwise smaller ones (but not equal to)
        Throws:
        IllegalArgumentException - if the size is negative

    • Method Detail

      • accept

        public boolean accept​(File file)
        Checks to see if the size of the file is favorable.

        If size equals threshold and smaller files are required, file IS NOT selected. If size equals threshold and larger files are required, file IS selected.

        Specified by:
        accept in interface FileFilter
        Specified by:
        accept in interface IOFileFilter
        Overrides:
        accept in class AbstractFileFilter
        Parameters:
        file - the File to check
        Returns:
        true if the file name matches

      • accept

        public FileVisitResult accept​(Path file,
                              BasicFileAttributes attributes)
        Checks to see if the size of the file is favorable.

        If size equals threshold and smaller files are required, file IS NOT selected. If size equals threshold and larger files are required, file IS selected.

        Specified by:
        accept in interface IOFileFilter
        Specified by:
        accept in interface PathFilter
        Parameters:
        file - the File to check
        attributes - the file's basic attributes (TODO may be null).
        Returns:
        true if the file name matches

      • toString

        public String toString()
        Provide a String representation of this file filter.
        Overrides:
        toString in class AbstractFileFilter
        Returns:
        a String representation