Class Directory

    • Field Detail

      • entryInParent

        private DirectoryEntry entryInParent
        The entry linking to this directory in its parent directory.
      • INITIAL_RESIZE_THRESHOLD

        private static final int INITIAL_RESIZE_THRESHOLD
        See Also:
        Constant Field Values
      • resizeThreshold

        private int resizeThreshold
      • entryCount

        private int entryCount
    • Constructor Detail

      • Directory

        private Directory​(int id,
                          java.nio.file.attribute.FileTime creationTime)
      • Directory

        private Directory​(int id,
                          java.nio.file.attribute.FileTime creationTime,
                          Name rootName)
    • Method Detail

      • create

        public static Directory create​(int id,
                                       java.nio.file.attribute.FileTime creationTime)
        Creates a new normal directory with the given ID and creation time.
      • createRoot

        public static Directory createRoot​(int id,
                                           java.nio.file.attribute.FileTime creationTime,
                                           Name name)
        Creates a new root directory with the given ID, creation time, and name.
      • copyWithoutContent

        Directory copyWithoutContent​(int id,
                                     java.nio.file.attribute.FileTime creationTime)
        Creates a copy of this directory. The copy does not contain a copy of the entries in this directory.
        Specified by:
        copyWithoutContent in class File
      • entryInParent

        public DirectoryEntry entryInParent()
        Returns the entry linking to this directory in its parent. If this directory has been deleted, this returns the entry for it in the directory it was in when it was deleted.
      • parent

        public Directory parent()
        Returns the parent of this directory. If this directory has been deleted, this returns the directory it was in when it was deleted.
      • linked

        void linked​(DirectoryEntry entry)
        Description copied from class: File
        Called when this file has been linked in a directory. The given entry is the new directory entry that links to this file.
        Overrides:
        linked in class File
      • unlinked

        void unlinked()
        Description copied from class: File
        Called when this file has been unlinked from a directory, either for a move or delete.
        Overrides:
        unlinked in class File
      • entryCount

        int entryCount()
        Returns the number of entries in this directory.
      • isEmpty

        public boolean isEmpty()
        Returns true if this directory has no entries other than those to itself and its parent.
      • get

        public @Nullable DirectoryEntry get​(Name name)
        Returns the entry for the given name in this table or null if no such entry exists.
      • link

        public void link​(Name name,
                         File file)
        Links the given name to the given file in this directory.
        Throws:
        java.lang.IllegalArgumentException - if name is a reserved name such as "." or if an entry already exists for the name
      • unlink

        public void unlink​(Name name)
        Unlinks the given name from the file it is linked to.
        Throws:
        java.lang.IllegalArgumentException - if name is a reserved name such as "." or no entry exists for the name
      • snapshot

        public com.google.common.collect.ImmutableSortedSet<Name> snapshot()
        Creates an immutable sorted snapshot of the names this directory contains, excluding "." and "..".
      • checkNotReserved

        private static Name checkNotReserved​(Name name,
                                             java.lang.String action)
        Checks that the given name is not "." or "..". Those names cannot be set/removed by users.
      • isReserved

        private static boolean isReserved​(Name name)
        Returns true if the given name is "." or "..".
      • bucketIndex

        private static int bucketIndex​(Name name,
                                       int tableLength)
        Returns the index of the bucket in the array where an entry for the given name should go.
      • put

        void put​(DirectoryEntry entry)
        Adds the given entry to the directory.
        Throws:
        java.lang.IllegalArgumentException - if an entry with the given entry's name already exists in the directory
      • put

        private void put​(DirectoryEntry entry,
                         boolean overwriteExisting)
        Adds the given entry to the directory. overwriteExisting determines whether an existing entry with the same name should be overwritten or an exception should be thrown.
      • forcePut

        private void forcePut​(DirectoryEntry entry)
        Adds the given entry to the directory, overwriting an existing entry with the same name if such an entry exists.
      • expandIfNeeded

        private boolean expandIfNeeded()
      • remove

        @CanIgnoreReturnValue
        DirectoryEntry remove​(Name name)
        Removes and returns the entry for the given name from the directory.
        Throws:
        java.lang.IllegalArgumentException - if there is no entry with the given name in the directory