com.feilong.lib.ognl.JJTOgnlParserState Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of feilong Show documentation
feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.
There is a newer version: 4.0.8
Show newest version
/* Generated By:JavaCC: Do not edit this line. JJTOgnlParserState.java Version 4.1d1 */
package com.feilong.lib.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) */