org.apache.hadoop.hive.serde2.dynamic_type.JJTthrift_grammarState Maven / Gradle / Ivy

/* Generated By:JavaCC: Do not edit this line. JJTthrift_grammarState.java Version 4.1 */
package org.apache.hadoop.hive.serde2.dynamic_type;

public class JJTthrift_grammarState {
  private final java.util.List nodes;
  private final java.util.List marks;

  private int sp; // number of nodes on stack
  private int mk; // current mark
  private boolean node_created;

  public JJTthrift_grammarState() {
    nodes = new java.util.ArrayList();
    marks = new java.util.ArrayList();
    sp = 0;
    mk = 0;
  }

  /*
   * Determines whether the current node was actually closed and pushed. This
   * should only be called in the final user action of a node scope.
   */
  public boolean nodeCreated() {
    return node_created;
  }

  /*
   * Call this to reinitialize the node stack. It is called automatically by the
   * parser's ReInit() method.
   */
  public void reset() {
    nodes.clear();
    marks.clear();
    sp = 0;
    mk = 0;
  }

  /*
   * Returns the root node of the AST. It only makes sense to call this after a
   * successful parse.
   */
  public Node rootNode() {
    return (Node) nodes.get(0);
  }

  /* Pushes a node on to the stack. */
  public void pushNode(Node n) {
    nodes.add(n);
    ++sp;
  }

  /*
   * Returns the node on the top of the stack, and remove it from the stack.
   */
  public Node popNode() {
    if (--sp < mk) {
      mk = ((Integer) marks.remove(marks.size() - 1)).intValue();
    }
    return (Node) nodes.remove(nodes.size() - 1);
  }

  /* Returns the node currently on the top of the stack. */
  public Node peekNode() {
    return (Node) nodes.get(nodes.size() - 1);
  }

  /*
   * Returns the number of children on the stack in the current node scope.
   */
  public int nodeArity() {
    return sp - mk;
  }

  public void clearNodeScope(Node n) {
    while (sp > mk) {
      popNode();
    }
    mk = ((Integer) marks.remove(marks.size() - 1)).intValue();
  }

  public void openNodeScope(Node n) {
    marks.add(new Integer(mk));
    mk = sp;
    n.jjtOpen();
  }

  /*
   * A definite node is constructed from a specified number of children. That
   * number of nodes are popped from the stack and made the children of the
   * definite node. Then the definite node is pushed on to the stack.
   */
  public void closeNodeScope(Node n, int num) {
    mk = ((Integer) marks.remove(marks.size() - 1)).intValue();
    while (num-- > 0) {
      Node c = popNode();
      c.jjtSetParent(n);
      n.jjtAddChild(c, num);
    }
    n.jjtClose();
    pushNode(n);
    node_created = true;
  }

  /*
   * A conditional node is constructed if its condition is true. All the nodes
   * that have been pushed since the node was opened are made children of the
   * conditional node, which is then pushed on to the stack. If the condition is
   * false the node is not constructed and they are left on the stack.
   */
  public void closeNodeScope(Node n, boolean condition) {
    if (condition) {
      int a = nodeArity();
      mk = ((Integer) marks.remove(marks.size() - 1)).intValue();
      while (a-- > 0) {
        Node c = popNode();
        c.jjtSetParent(n);
        n.jjtAddChild(c, a);
      }
      n.jjtClose();
      pushNode(n);
      node_created = true;
    } else {
      mk = ((Integer) marks.remove(marks.size() - 1)).intValue();
      node_created = false;
    }
  }
}
/*
 * JavaCC - OriginalChecksum=67039445e12d18e18e63124a33879cd3 (do not edit this
 * line)
 */