org.apache.ibatis.ognl.JJTOgnlParserState Maven / Gradle / Ivy

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/* Generated By:JavaCC: Do not edit this line. JJTOgnlParserState.java Version 4.1d1 */
package org.apache.ibatis.ognl;

public class JJTOgnlParserState {
    private java.util.List nodes;
    private java.util.List marks;

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

    public JJTOgnlParserState() {
        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=61071c68a05e7c9104307c34a2e37165 (do not edit this line) */