com.ximpleware.extended.xpath.Expr 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.extended.xpath;
import com.ximpleware.extended.*;
/**
*
* This is the abstract class on which all XPath expressions
* are based
*/
abstract public class Expr {
abstract public boolean evalBoolean(VTDNavHuge vn);
abstract public double evalNumber(VTDNavHuge vn);
abstract public int evalNodeSet(VTDNavHuge vn) throws XPathEvalExceptionHuge, NavExceptionHuge;
abstract public String evalString(VTDNavHuge vn);
abstract public void reset(VTDNavHuge vn);
abstract public String toString();
abstract public boolean isNumerical();
abstract public boolean isNodeSet();
abstract public boolean isString();
abstract public boolean isBoolean();
abstract public boolean requireContextSize();
abstract public void setContextSize(int size);
abstract public void setPosition(int pos);
abstract public int adjust(int n);
// to support computer context size
// needs to add
//abstract public boolean needContextSize();
//abstract public boolean SetContextSize(int contextSize);
}