Class PathUtils


  • public final class PathUtils
    extends java.lang.Object
    NIO Path utilities.
    Since:
    2.7
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static Counters.PathCounters cleanDirectory​(java.nio.file.Path directory)
      Cleans a directory including sub-directories without deleting directories.
      static Counters.PathCounters cleanDirectory​(java.nio.file.Path directory, DeleteOption... options)
      Cleans a directory including sub-directories without deleting directories.
      static Counters.PathCounters copyDirectory​(java.nio.file.Path sourceDirectory, java.nio.file.Path targetDirectory, java.nio.file.CopyOption... copyOptions)
      Copies a directory to another directory.
      static java.nio.file.Path copyFile​(java.net.URL sourceFile, java.nio.file.Path targetFile, java.nio.file.CopyOption... copyOptions)
      Copies a URL to a directory.
      static java.nio.file.Path copyFileToDirectory​(java.net.URL sourceFile, java.nio.file.Path targetDirectory, java.nio.file.CopyOption... copyOptions)
      Copies a URL to a directory.
      static java.nio.file.Path copyFileToDirectory​(java.nio.file.Path sourceFile, java.nio.file.Path targetDirectory, java.nio.file.CopyOption... copyOptions)
      Copies a file to a directory.
      static Counters.PathCounters countDirectory​(java.nio.file.Path directory)
      Counts aspects of a directory including sub-directories.
      static Counters.PathCounters delete​(java.nio.file.Path path)
      Deletes a file or directory.
      static Counters.PathCounters delete​(java.nio.file.Path path, DeleteOption... options)
      Deletes a file or directory.
      static Counters.PathCounters deleteDirectory​(java.nio.file.Path directory)
      Deletes a directory including sub-directories.
      static Counters.PathCounters deleteDirectory​(java.nio.file.Path directory, DeleteOption... options)
      Deletes a directory including sub-directories.
      static Counters.PathCounters deleteFile​(java.nio.file.Path file)
      Deletes the given file.
      static Counters.PathCounters deleteFile​(java.nio.file.Path file, DeleteOption... options)
      Deletes the given file.
      static boolean directoryAndFileContentEquals​(java.nio.file.Path path1, java.nio.file.Path path2)
      Compares the file sets of two Paths to determine if they are equal or not while considering file contents.
      static boolean directoryAndFileContentEquals​(java.nio.file.Path path1, java.nio.file.Path path2, java.nio.file.LinkOption[] linkOptions, java.nio.file.OpenOption[] openOptions, java.nio.file.FileVisitOption[] fileVisitOption)
      Compares the file sets of two Paths to determine if they are equal or not while considering file contents.
      static boolean directoryContentEquals​(java.nio.file.Path path1, java.nio.file.Path path2)
      Compares the file sets of two Paths to determine if they are equal or not without considering file contents.
      static boolean directoryContentEquals​(java.nio.file.Path path1, java.nio.file.Path path2, int maxDepth, java.nio.file.LinkOption[] linkOptions, java.nio.file.FileVisitOption[] fileVisitOptions)
      Compares the file sets of two Paths to determine if they are equal or not without considering file contents.
      static boolean fileContentEquals​(java.nio.file.Path path1, java.nio.file.Path path2)
      Compares the file contents of two Paths to determine if they are equal or not.
      static boolean fileContentEquals​(java.nio.file.Path path1, java.nio.file.Path path2, java.nio.file.LinkOption[] linkOptions, java.nio.file.OpenOption[] openOptions)
      Compares the file contents of two Paths to determine if they are equal or not.
      static java.util.List<java.nio.file.attribute.AclEntry> getAclEntryList​(java.nio.file.Path sourcePath)
      Reads the access control list from a file attribute view.
      static boolean isEmpty​(java.nio.file.Path path)
      Returns whether the given file or directory is empty.
      static boolean isEmptyDirectory​(java.nio.file.Path directory)
      Returns whether the directory is empty.
      static boolean isEmptyFile​(java.nio.file.Path file)
      Returns whether the given file is empty.
      static java.nio.file.Path setReadOnly​(java.nio.file.Path path, boolean readOnly, java.nio.file.LinkOption... options)
      Sets the given Path to the readOnly value.
      static <T extends java.nio.file.FileVisitor<? super java.nio.file.Path>>
      T
      visitFileTree​(T visitor, java.lang.String first, java.lang.String... more)
      Performs Files.walkFileTree(Path,FileVisitor) and returns the given visitor.
      static <T extends java.nio.file.FileVisitor<? super java.nio.file.Path>>
      T
      visitFileTree​(T visitor, java.net.URI uri)
      Performs Files.walkFileTree(Path,FileVisitor) and returns the given visitor.
      static <T extends java.nio.file.FileVisitor<? super java.nio.file.Path>>
      T
      visitFileTree​(T visitor, java.nio.file.Path directory)
      Performs Files.walkFileTree(Path,FileVisitor) and returns the given visitor.
      static <T extends java.nio.file.FileVisitor<? super java.nio.file.Path>>
      T
      visitFileTree​(T visitor, java.nio.file.Path start, java.util.Set<java.nio.file.FileVisitOption> options, int maxDepth)
      Performs Files.walkFileTree(Path,FileVisitor) and returns the given visitor.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • EMPTY_DELETE_OPTION_ARRAY

        public static final DeleteOption[] EMPTY_DELETE_OPTION_ARRAY
        Empty LinkOption array.
        Since:
        2.8.0
      • EMPTY_FILE_VISIT_OPTION_ARRAY

        public static final java.nio.file.FileVisitOption[] EMPTY_FILE_VISIT_OPTION_ARRAY
        Empty FileVisitOption array.
      • EMPTY_LINK_OPTION_ARRAY

        public static final java.nio.file.LinkOption[] EMPTY_LINK_OPTION_ARRAY
        Empty LinkOption array.
      • EMPTY_OPEN_OPTION_ARRAY

        public static final java.nio.file.OpenOption[] EMPTY_OPEN_OPTION_ARRAY
        Empty OpenOption array.
    • Method Detail

      • cleanDirectory

        public static Counters.PathCounters cleanDirectory​(java.nio.file.Path directory)
                                                    throws java.io.IOException
        Cleans a directory including sub-directories without deleting directories.
        Parameters:
        directory - directory to clean.
        Returns:
        The visitation path counters.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method.
      • cleanDirectory

        public static Counters.PathCounters cleanDirectory​(java.nio.file.Path directory,
                                                           DeleteOption... options)
                                                    throws java.io.IOException
        Cleans a directory including sub-directories without deleting directories.
        Parameters:
        directory - directory to clean.
        options - options indicating how deletion is handled.
        Returns:
        The visitation path counters.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method.
        Since:
        2.8.0
      • copyDirectory

        public static Counters.PathCounters copyDirectory​(java.nio.file.Path sourceDirectory,
                                                          java.nio.file.Path targetDirectory,
                                                          java.nio.file.CopyOption... copyOptions)
                                                   throws java.io.IOException
        Copies a directory to another directory.
        Parameters:
        sourceDirectory - The source directory.
        targetDirectory - The target directory.
        copyOptions - Specifies how the copying should be done.
        Returns:
        The visitation path counters.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method.
      • copyFile

        public static java.nio.file.Path copyFile​(java.net.URL sourceFile,
                                                  java.nio.file.Path targetFile,
                                                  java.nio.file.CopyOption... copyOptions)
                                           throws java.io.IOException
        Copies a URL to a directory.
        Parameters:
        sourceFile - The source URL.
        targetFile - The target file.
        copyOptions - Specifies how the copying should be done.
        Returns:
        The target file
        Throws:
        java.io.IOException - if an I/O error occurs
        See Also:
        Files.copy(InputStream, Path, CopyOption...)
      • copyFileToDirectory

        public static java.nio.file.Path copyFileToDirectory​(java.nio.file.Path sourceFile,
                                                             java.nio.file.Path targetDirectory,
                                                             java.nio.file.CopyOption... copyOptions)
                                                      throws java.io.IOException
        Copies a file to a directory.
        Parameters:
        sourceFile - The source file.
        targetDirectory - The target directory.
        copyOptions - Specifies how the copying should be done.
        Returns:
        The target file
        Throws:
        java.io.IOException - if an I/O error occurs
        See Also:
        Files.copy(Path, Path, CopyOption...)
      • copyFileToDirectory

        public static java.nio.file.Path copyFileToDirectory​(java.net.URL sourceFile,
                                                             java.nio.file.Path targetDirectory,
                                                             java.nio.file.CopyOption... copyOptions)
                                                      throws java.io.IOException
        Copies a URL to a directory.
        Parameters:
        sourceFile - The source URL.
        targetDirectory - The target directory.
        copyOptions - Specifies how the copying should be done.
        Returns:
        The target file
        Throws:
        java.io.IOException - if an I/O error occurs
        See Also:
        Files.copy(InputStream, Path, CopyOption...)
      • countDirectory

        public static Counters.PathCounters countDirectory​(java.nio.file.Path directory)
                                                    throws java.io.IOException
        Counts aspects of a directory including sub-directories.
        Parameters:
        directory - directory to delete.
        Returns:
        The visitor used to count the given directory.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method.
      • delete

        public static Counters.PathCounters delete​(java.nio.file.Path path)
                                            throws java.io.IOException
        Deletes a file or directory. If the path is a directory, delete it and all sub-directories.

        The difference between File.delete() and this method are:

        • A directory to delete does not have to be empty.
        • You get exceptions when a file or directory cannot be deleted; File.delete() returns a boolean.
        Parameters:
        path - file or directory to delete, must not be null
        Returns:
        The visitor used to delete the given directory.
        Throws:
        java.lang.NullPointerException - if the directory is null
        java.io.IOException - if an I/O error is thrown by a visitor method or if an I/O error occurs.
      • delete

        public static Counters.PathCounters delete​(java.nio.file.Path path,
                                                   DeleteOption... options)
                                            throws java.io.IOException
        Deletes a file or directory. If the path is a directory, delete it and all sub-directories.

        The difference between File.delete() and this method are:

        • A directory to delete does not have to be empty.
        • You get exceptions when a file or directory cannot be deleted; File.delete() returns a boolean.
        Parameters:
        path - file or directory to delete, must not be null
        options - options indicating how deletion is handled.
        Returns:
        The visitor used to delete the given directory.
        Throws:
        java.lang.NullPointerException - if the directory is null
        java.io.IOException - if an I/O error is thrown by a visitor method or if an I/O error occurs.
        Since:
        2.8.0
      • deleteDirectory

        public static Counters.PathCounters deleteDirectory​(java.nio.file.Path directory)
                                                     throws java.io.IOException
        Deletes a directory including sub-directories.
        Parameters:
        directory - directory to delete.
        Returns:
        The visitor used to delete the given directory.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method.
      • deleteDirectory

        public static Counters.PathCounters deleteDirectory​(java.nio.file.Path directory,
                                                            DeleteOption... options)
                                                     throws java.io.IOException
        Deletes a directory including sub-directories.
        Parameters:
        directory - directory to delete.
        options - options indicating how deletion is handled.
        Returns:
        The visitor used to delete the given directory.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method.
        Since:
        2.8.0
      • deleteFile

        public static Counters.PathCounters deleteFile​(java.nio.file.Path file)
                                                throws java.io.IOException
        Deletes the given file.
        Parameters:
        file - The file to delete.
        Returns:
        A visitor with path counts set to 1 file, 0 directories, and the size of the deleted file.
        Throws:
        java.io.IOException - if an I/O error occurs.
        java.nio.file.NoSuchFileException - if the file is a directory.
      • deleteFile

        public static Counters.PathCounters deleteFile​(java.nio.file.Path file,
                                                       DeleteOption... options)
                                                throws java.io.IOException
        Deletes the given file.
        Parameters:
        file - The file to delete.
        options - options indicating how deletion is handled.
        Returns:
        A visitor with path counts set to 1 file, 0 directories, and the size of the deleted file.
        Throws:
        java.io.IOException - if an I/O error occurs.
        java.nio.file.NoSuchFileException - if the file is a directory.
        Since:
        2.8.0
      • directoryAndFileContentEquals

        public static boolean directoryAndFileContentEquals​(java.nio.file.Path path1,
                                                            java.nio.file.Path path2)
                                                     throws java.io.IOException
        Compares the file sets of two Paths to determine if they are equal or not while considering file contents. The comparison includes all files in all sub-directories.
        Parameters:
        path1 - The first directory.
        path2 - The second directory.
        Returns:
        Whether the two directories contain the same files while considering file contents.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method
      • directoryAndFileContentEquals

        public static boolean directoryAndFileContentEquals​(java.nio.file.Path path1,
                                                            java.nio.file.Path path2,
                                                            java.nio.file.LinkOption[] linkOptions,
                                                            java.nio.file.OpenOption[] openOptions,
                                                            java.nio.file.FileVisitOption[] fileVisitOption)
                                                     throws java.io.IOException
        Compares the file sets of two Paths to determine if they are equal or not while considering file contents. The comparison includes all files in all sub-directories.
        Parameters:
        path1 - The first directory.
        path2 - The second directory.
        linkOptions - options to follow links.
        openOptions - options to open files.
        fileVisitOption - options to configure traversal.
        Returns:
        Whether the two directories contain the same files while considering file contents.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method
      • directoryContentEquals

        public static boolean directoryContentEquals​(java.nio.file.Path path1,
                                                     java.nio.file.Path path2)
                                              throws java.io.IOException
        Compares the file sets of two Paths to determine if they are equal or not without considering file contents. The comparison includes all files in all sub-directories.
        Parameters:
        path1 - The first directory.
        path2 - The second directory.
        Returns:
        Whether the two directories contain the same files without considering file contents.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method
      • directoryContentEquals

        public static boolean directoryContentEquals​(java.nio.file.Path path1,
                                                     java.nio.file.Path path2,
                                                     int maxDepth,
                                                     java.nio.file.LinkOption[] linkOptions,
                                                     java.nio.file.FileVisitOption[] fileVisitOptions)
                                              throws java.io.IOException
        Compares the file sets of two Paths to determine if they are equal or not without considering file contents. The comparison includes all files in all sub-directories.
        Parameters:
        path1 - The first directory.
        path2 - The second directory.
        maxDepth - See Files.walkFileTree(Path,Set,int,FileVisitor).
        linkOptions - options to follow links.
        fileVisitOptions - options to configure the traversal
        Returns:
        Whether the two directories contain the same files without considering file contents.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method
      • fileContentEquals

        public static boolean fileContentEquals​(java.nio.file.Path path1,
                                                java.nio.file.Path path2)
                                         throws java.io.IOException
        Compares the file contents of two Paths to determine if they are equal or not.

        File content is accessed through Files.newInputStream(Path,OpenOption...).

        Parameters:
        path1 - the first stream.
        path2 - the second stream.
        Returns:
        true if the content of the streams are equal or they both don't exist, false otherwise.
        Throws:
        java.lang.NullPointerException - if either input is null.
        java.io.IOException - if an I/O error occurs.
        See Also:
        FileUtils.contentEquals(java.io.File, java.io.File)
      • fileContentEquals

        public static boolean fileContentEquals​(java.nio.file.Path path1,
                                                java.nio.file.Path path2,
                                                java.nio.file.LinkOption[] linkOptions,
                                                java.nio.file.OpenOption[] openOptions)
                                         throws java.io.IOException
        Compares the file contents of two Paths to determine if they are equal or not.

        File content is accessed through Files.newInputStream(Path,OpenOption...).

        Parameters:
        path1 - the first stream.
        path2 - the second stream.
        linkOptions - options specifying how files are followed.
        openOptions - options specifying how files are opened.
        Returns:
        true if the content of the streams are equal or they both don't exist, false otherwise.
        Throws:
        java.lang.NullPointerException - if either input is null.
        java.io.IOException - if an I/O error occurs.
        See Also:
        FileUtils.contentEquals(java.io.File, java.io.File)
      • getAclEntryList

        public static java.util.List<java.nio.file.attribute.AclEntry> getAclEntryList​(java.nio.file.Path sourcePath)
                                                                                throws java.io.IOException
        Reads the access control list from a file attribute view.
        Parameters:
        sourcePath - the path to the file.
        Returns:
        a file attribute view of the specified type, or null ifthe attribute view type is not available.
        Throws:
        java.io.IOException - if an I/O error occurs.
        Since:
        2.8.0
      • isEmpty

        public static boolean isEmpty​(java.nio.file.Path path)
                               throws java.io.IOException
        Returns whether the given file or directory is empty.
        Parameters:
        path - the the given file or directory to query.
        Returns:
        whether the given file or directory is empty.
        Throws:
        java.io.IOException - if an I/O error occurs
      • isEmptyDirectory

        public static boolean isEmptyDirectory​(java.nio.file.Path directory)
                                        throws java.io.IOException
        Returns whether the directory is empty.
        Parameters:
        directory - the the given directory to query.
        Returns:
        whether the given directory is empty.
        Throws:
        java.io.IOException - if an I/O error occurs
      • isEmptyFile

        public static boolean isEmptyFile​(java.nio.file.Path file)
                                   throws java.io.IOException
        Returns whether the given file is empty.
        Parameters:
        file - the the given file to query.
        Returns:
        whether the given file is empty.
        Throws:
        java.io.IOException - if an I/O error occurs
      • setReadOnly

        public static java.nio.file.Path setReadOnly​(java.nio.file.Path path,
                                                     boolean readOnly,
                                                     java.nio.file.LinkOption... options)
                                              throws java.io.IOException
        Sets the given Path to the readOnly value.

        This behavior is OS dependent.

        Parameters:
        path - The path to set.
        readOnly - true for read-only, false for not read-only.
        options - options indicating how symbolic links are handled.
        Returns:
        The given path.
        Throws:
        java.io.IOException - if an I/O error occurs.
        Since:
        2.8.0
      • visitFileTree

        public static <T extends java.nio.file.FileVisitor<? super java.nio.file.Path>> T visitFileTree​(T visitor,
                                                                                                        java.nio.file.Path directory)
                                                                                                 throws java.io.IOException
        Performs Files.walkFileTree(Path,FileVisitor) and returns the given visitor. Note that Files.walkFileTree(Path,FileVisitor) returns the given path.
        Type Parameters:
        T - See Files.walkFileTree(Path,FileVisitor).
        Parameters:
        visitor - See Files.walkFileTree(Path,FileVisitor).
        directory - See Files.walkFileTree(Path,FileVisitor).
        Returns:
        the given visitor.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method
      • visitFileTree

        public static <T extends java.nio.file.FileVisitor<? super java.nio.file.Path>> T visitFileTree​(T visitor,
                                                                                                        java.nio.file.Path start,
                                                                                                        java.util.Set<java.nio.file.FileVisitOption> options,
                                                                                                        int maxDepth)
                                                                                                 throws java.io.IOException
        Performs Files.walkFileTree(Path,FileVisitor) and returns the given visitor. Note that Files.walkFileTree(Path,FileVisitor) returns the given path.
        Type Parameters:
        T - See Files.walkFileTree(Path,Set,int,FileVisitor).
        Parameters:
        start - See Files.walkFileTree(Path,Set,int,FileVisitor).
        options - See Files.walkFileTree(Path,Set,int,FileVisitor).
        maxDepth - See Files.walkFileTree(Path,Set,int,FileVisitor).
        visitor - See Files.walkFileTree(Path,Set,int,FileVisitor).
        Returns:
        the given visitor.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method
      • visitFileTree

        public static <T extends java.nio.file.FileVisitor<? super java.nio.file.Path>> T visitFileTree​(T visitor,
                                                                                                        java.lang.String first,
                                                                                                        java.lang.String... more)
                                                                                                 throws java.io.IOException
        Performs Files.walkFileTree(Path,FileVisitor) and returns the given visitor. Note that Files.walkFileTree(Path,FileVisitor) returns the given path.
        Type Parameters:
        T - See Files.walkFileTree(Path,FileVisitor).
        Parameters:
        visitor - See Files.walkFileTree(Path,FileVisitor).
        first - See Paths.get(String,String[]).
        more - See Paths.get(String,String[]).
        Returns:
        the given visitor.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method
      • visitFileTree

        public static <T extends java.nio.file.FileVisitor<? super java.nio.file.Path>> T visitFileTree​(T visitor,
                                                                                                        java.net.URI uri)
                                                                                                 throws java.io.IOException
        Performs Files.walkFileTree(Path,FileVisitor) and returns the given visitor. Note that Files.walkFileTree(Path,FileVisitor) returns the given path.
        Type Parameters:
        T - See Files.walkFileTree(Path,FileVisitor).
        Parameters:
        visitor - See Files.walkFileTree(Path,FileVisitor).
        uri - See Paths.get(URI).
        Returns:
        the given visitor.
        Throws:
        java.io.IOException - if an I/O error is thrown by a visitor method