Package org.magicwerk.brownies.collections.primitive

Class ShortBigList.ShortBlockNode

java.lang.Object
org.magicwerk.brownies.collections.primitive.ShortBigList.ShortBlockNode
Enclosing class:
ShortBigList
static class ShortBigList.ShortBlockNode extends Object
Implements an AVLNode storing a ShortBlock. The nodes don't know the index of the object they are holding. They do know however their position relative to their parent node. This allows to calculate the index of a node while traversing the tree. There is a faedelung flag for both the left and right child to indicate if they are a child (false) or a link as in linked list (true).

  • Field Details

    • parent

      ShortBigList.ShortBlockNode parent
      Pointer to parent node (null for root)

    • left

      ShortBigList.ShortBlockNode left
      The left child node or the predecessor if leftIsPrevious.

    • leftIsPrevious

      boolean leftIsPrevious
      Flag indicating that left reference is not a subtree but the predecessor.

    • rightIsNext

      boolean rightIsNext
      Flag indicating that right reference is not a subtree but the successor.

    • height

      int height
      How many levels of left/right are below this one.

    • relPos

      int relPos
      Relative position of node relative to its parent, root holds absolute position.

    • block

      ShortBigList.ShortBlock block
      The stored block

  • Constructor Details

  • Method Details

    • getShortBlock

      private ShortBigList.ShortBlock getShortBlock()
      Gets the block stored by this node.
      Returns:
      block stored by this node

    • setShortBlock

      private void setShortBlock(ShortBigList.ShortBlock block)
      Sets block to store by this node.
      Parameters:
      block - the block to store

    • next

      private ShortBigList.ShortBlockNode next()
      Gets the next node in the list after this one.
      Returns:
      the next node

    • previous

      private ShortBigList.ShortBlockNode previous()
      Gets the node in the list before this one.
      Returns:
      the previous node

    • insert

      private ShortBigList.ShortBlockNode insert(int index, ShortBigList.ShortBlock obj)
      Inserts new node holding specified block at the position index.
      Parameters:
      index - index of the position relative to the position of the parent node
      obj - object to store in the position
      Returns:
      this node or node replacing this node in the tree (if tree must be rebalanced)

    • insertOnLeft

      private ShortBigList.ShortBlockNode insertOnLeft(int relIndex, ShortBigList.ShortBlock obj)
      Inserts new node holding specified block on the node's left side.
      Parameters:
      obj - object to store in the position
      index - index of the position relative to the position of the parent node
      Returns:
      this node or node replacing this node in the tree (if tree must be rebalanced)

    • insertOnRight

      private ShortBigList.ShortBlockNode insertOnRight(int relIndex, ShortBigList.ShortBlock obj)
      Inserts new node holding specified block on the node's right side.
      Parameters:
      obj - object to store in the position
      index - index of the position relative to the position of the parent node
      Returns:
      this node or node replacing this node in the tree (if tree must be rebalanced)

    • getLeftSubTree

      private ShortBigList.ShortBlockNode getLeftSubTree()
      Gets the left node, returning null if its a faedelung.

    • getRightSubTree

      private ShortBigList.ShortBlockNode getRightSubTree()
      Gets the right node, returning null if its a faedelung.

    • max

      private ShortBigList.ShortBlockNode max()
      Gets the rightmost child of this node.
      Returns:
      the rightmost child (greatest index)

    • min

      private ShortBigList.ShortBlockNode min()
      Gets the leftmost child of this node.
      Returns:
      the leftmost child (smallest index)

    • removeMax

      private ShortBigList.ShortBlockNode removeMax()

    • removeMin

      private ShortBigList.ShortBlockNode removeMin(int size)

    • removeSelf

      private ShortBigList.ShortBlockNode removeSelf()
      Removes this node from the tree.
      Returns:
      the node that replaces this one in the parent (can be null)

    • doRemoveSelf

      private ShortBigList.ShortBlockNode doRemoveSelf()

    • balance

      private ShortBigList.ShortBlockNode balance()
      Balances according to the AVL algorithm.

    • getOffset

      private int getOffset(ShortBigList.ShortBlockNode node)
      Gets the relative position.

    • setOffset

      private int setOffset(ShortBigList.ShortBlockNode node, int newOffest)
      Sets the relative position.

    • recalcHeight

      private void recalcHeight()
      Sets the height by calculation.

    • getHeight

      private int getHeight(ShortBigList.ShortBlockNode node)
      Returns the height of the node or -1 if the node is null.

    • heightRightMinusLeft

      private int heightRightMinusLeft()
      Returns the height difference right - left

    • rotateLeft

      private ShortBigList.ShortBlockNode rotateLeft()
      Rotate tree to the left using this node as center.
      Returns:
      node which will take the place of this node

    • rotateRight

      private ShortBigList.ShortBlockNode rotateRight()
      Rotate tree to the right using this node as center.
      Returns:
      node which will take the place of this node

    • setLeft

      private void setLeft(ShortBigList.ShortBlockNode node, ShortBigList.ShortBlockNode previous)
      Sets the left field to the node, or the previous node if that is null
      Parameters:
      node - the new left subtree node
      previous - the previous node in the linked list

    • setRight

      private void setRight(ShortBigList.ShortBlockNode node, ShortBigList.ShortBlockNode next)
      Sets the right field to the node, or the next node if that is null
      Parameters:
      node - the new right subtree node
      next - the next node in the linked list

    • toString

      public String toString()
      Used for debugging.
      Overrides:
      toString in class Object