com.ximpleware.xpath.Predicate 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) 2002-2016 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.xpath;
import com.ximpleware.*;
/**
 * LocationPathExpr uses this class to represent a predicate
 *
 */
public class Predicate /*implements LocationPathNode*/{
	double d; // only supports a[1] style of location path for now
	public Predicate nextP;
	public int count;
	public Expr expr;
	public int type;
	public Step s;
	public FilterExpr fe;
	public boolean requireContext;
	public final static int simple=0;
	public final static int complex=1;
	
	
	public Predicate(){
		nextP = (Predicate) null;
		count = 0;
		d = 0;
		requireContext = false;
		type = complex;
	}
	final public boolean eval2(VTDNav vn) {
		boolean b;		
		count++; // increment the position
		expr.setPosition(count);
		if (expr.isNumerical()){		    
			b = (expr.evalNumber(vn)== count);
		}
		else{ 
			b = expr.evalBoolean(vn);
		}
		return b;
	}
	
	final public boolean eval(VTDNav vn){
		count++;
		switch (type){
		case simple:
			if (d