com.ximpleware.UnionExpr Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of vtd-xml Show documentation
XimpleWare's VTD-XML is, far and away, the industry's most advanced and powerful XML processing model for SOA and Cloud Computing
The newest version!
/* 
 * Copyright (C) 2002-2017 XimpleWare, [email protected]
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
/*VTD-XML is protected by US patent 7133857, 7260652, an 7761459*/
/*All licenses to any parties in litigation with XimpleWare have been expressly terminated. No new license, and no renewal of any revoked license, 
 * is granted to those parties as a result of re-downloading software from this or any other website*/
package com.ximpleware;

import com.ximpleware.xpath.*;

public class UnionExpr extends Expr {
    public intHash ih;

    public Expr e;

    public UnionExpr next;

    UnionExpr current;

    int state;

    public UnionExpr(Expr e1) {
        e = e1;
        next = null;
        current = this;
        ih = null;
        state = 0;
        //cacheable =false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.ximpleware.xpath.Expr#evalBoolean(com.ximpleware.VTDNav)
     */
    final public boolean evalBoolean(VTDNav vn) {
        /*if (e.isNodeSet()==false)
            return e.evalBoolean(vn);
        else{*/
            boolean a = false;
            vn.push2();
            // record teh stack size
            int size = vn.contextStack2.size;
            try {
                a = (evalNodeSet(vn) != -1);
            } catch (Exception e) {
            }
            //rewind stack
            vn.contextStack2.size = size;
            reset(vn);
            vn.pop2();
            return a;
        //}
        /*else if (e.isNumerical()){
            double dval = e.evalNumber(vn);
            if (dval == 0.0 || Double.isNaN(dval) )
    			return false;
    		return true;
            
        }else {
            String s = e.evalString(vn);
            if (s==null || s.length()==0)
                return false;
            return true;
            
        }*/
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.ximpleware.xpath.Expr#evalNumber(com.ximpleware.VTDNav)
     */
    final public double evalNumber(VTDNav vn) {
        if (e.isNodeSet()== false)
            return e.evalNumber(vn);   
        //double d;
        double d = Double.NaN;
		int a = 0x7fffffff,k = -1;
        vn.push2();
        int size = vn.contextStack2.size;
        try {
        	while((k=evalNodeSet(vn))!=-1){
        		//a = evalNodeSet(vn);
        		if (k