com.ximpleware.xpath.Predicate Maven / Gradle / Ivy
/*
* Copyright (C) 2002-2012 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.
*/
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