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SirixDB is a hybrid on-disk and in-memory document oriented, versioned database system. It has a lightweight buffer manager, stores everything in a huge persistent and durable tree and allows efficient reconstruction of every revision. Furthermore, SirixDB implements change tracking, diffing and supports time travel queries.

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package io.sirix.index.redblacktree.interfaces;

import io.sirix.node.interfaces.Node;

/**
 * Immutable RBNode.
 */
public interface ImmutableRBNodeValue extends Node {

  /**
   * Node value.
   * 
   * @return the node value
   */
  V getValue();

  /**
   * Determines node has a left child.
   * 
   * @return {@code true}, if it has a left child, {@code false} otherwise
   */
  boolean hasLeftChild();

  /**
   * Determines node has a right child.
   * 
   * @return {@code true}, if it has a left child, {@code false} otherwise
   */
  boolean hasRightChild();

  /**
   * Get left child.
   * 
   * @return left child pointer
   */
  long getLeftChildKey();

  /**
   * Get right child.
   * 
   * @return right child pointer
   */
  long getRightChildKey();
}