com.ximpleware.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;
import com.ximpleware.*;
/**
*
* This is the abstract class on which all XPath expressions
* are based
*/
abstract public class Expr {
abstract public boolean evalBoolean(VTDNav vn);
abstract public double evalNumber(VTDNav vn);
abstract public int evalNodeSet(VTDNav vn) throws XPathEvalException, NavException;
abstract public String evalString(VTDNav vn);
abstract public void reset(VTDNav 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);
//protected boolean cacheable;
abstract public boolean isFinal();
public void markCacheable(){}
public void markCacheable2(){}
//public boolean isConstant(){return false;}
public void clearCache(){}
// to support computer context size
// needs to add
//abstract public boolean needContextSize();
//abstract public boolean SetContextSize(int contextSize);
/*final protected int getStringIndex(VTDNav vn){
int a = -1;
vn.push2();
int size = vn.contextStack2.size;
try {
a = evalNodeSet(vn);
if (a != -1) {
int t = vn.getTokenType(a);
if (t == VTDNav.TOKEN_ATTR_NAME) {
a++;
} else if (vn.getTokenType(a) == VTDNav.TOKEN_STARTING_TAG) {
a = -2;
}else if (t == VTDNav.TOKEN_PI_NAME) {
a++;
}
}
} catch (Exception e) {
}
vn.contextStack2.size = size;
reset(vn);
vn.pop2();
return a;
}*/
protected int computeDataSize(VTDNav vn){
int i = vn.context[0];
if (vn.shallowDepth)
switch (i) {
case -1:
case 0:
return vn.vtdSize;
case 1:
return vn.vtdSize / vn.l1Buffer.size;
case 2:
return vn.vtdSize / vn.l2Buffer.size;
default:
return vn.vtdSize / vn.l3Buffer.size;
}
else {
VTDNav_L5 vnl = (VTDNav_L5) vn;
switch (i) {
case 0:
return vn.vtdSize;
case 1:
return vn.vtdSize / vn.l1Buffer.size;
case 2:
return vn.vtdSize / vn.l2Buffer.size;
case 3:
return vn.vtdSize / vnl.l3Buffer.size;
case 4:
return vnl.vtdSize / vnl.l4Buffer.size;
default:
return vnl.vtdSize / vnl.l5Buffer.size;
}
}
}
}