com.ximpleware.extended.UnionExpr 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;
import com.ximpleware.extended.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;
}
/*
* (non-Javadoc)
*
* @see com.ximpleware.xpath.Expr#evalBoolean(com.ximpleware.VTDNav)
*/
public boolean evalBoolean(VTDNavHuge 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;
}
}
/*
* (non-Javadoc)
*
* @see com.ximpleware.xpath.Expr#evalNumber(com.ximpleware.VTDNav)
*/
public double evalNumber(VTDNavHuge vn) {
if (e.isNodeSet()==false)
return e.evalNumber(vn);
int a = -1;
vn.push2();
int size = vn.contextStack2.size;
try {
a = evalNodeSet(vn);
if (a != -1) {
if (vn.getTokenType(a) == VTDNavHuge.TOKEN_ATTR_NAME) {
a++;
} else if (vn.getTokenType(a) == VTDNavHuge.TOKEN_STARTING_TAG) {
a = vn.getText();
}
}
} catch (Exception e) {
}
vn.contextStack2.size = size;
reset(vn);
vn.pop2();
try {
if (a != -1)
return vn.parseDouble(a);
} catch (NavExceptionHuge e) {
}
return Double.NaN;
}
/*
* (non-Javadoc)
*
* @see com.ximpleware.xpath.Expr#evalNodeSet(com.ximpleware.VTDNav)
*/
public int evalNodeSet(VTDNavHuge vn) throws XPathEvalExceptionHuge, NavExceptionHuge {
int a;
if (this.next == null) {
return e.evalNodeSet(vn);
} else {
while (true) {
switch (state) {
case 0:
if (ih==null)
ih = new intHash();
if (current != null) {
vn.push2();
while ((a = current.e.evalNodeSet(vn)) != -1) {
if (isUnique(a)) {
state = 1;
return a;
}
}
state = 2;
vn.pop2();
break;
} else
state = 3;
break;
case 1:
while ((a = current.e.evalNodeSet(vn)) != -1) {
if (isUnique(a)) {
state = 1;
return a;
}
}
state = 2;
vn.pop2();
break;
case 2:
current = current.next;
if (current != null) {
vn.push2();
while ((a = current.e.evalNodeSet(vn)) != -1) {
if (isUnique(a)) {
state = 1;
return a;
}
}
vn.pop2();
break;
} else
state = 3;
break;
case 3:
return -1;
default:
throw new XPathEvalExceptionHuge(
"Invalid state evaluating UnionExpr");
}
}
}
/*
* default: throw new XPathEvalException( "Invalid state evaluating
* PathExpr");
*/
}
/*
* (non-Javadoc)
*
* @see com.ximpleware.xpath.Expr#evalString(com.ximpleware.VTDNav)
*/
public String evalString(VTDNavHuge vn) {
if (e.isNodeSet()==false){
return e.evalString(vn);
}
vn.push2();
int size = vn.contextStack2.size;
int a = -1;
try {
a = evalNodeSet(vn);
if (a != -1) {
if (vn.getTokenType(a) == VTDNavHuge.TOKEN_ATTR_NAME) {
a++;
}
if (vn.getTokenType(a) == VTDNavHuge.TOKEN_STARTING_TAG) {
a = vn.getText();
}
}
} catch (Exception e) {
}
vn.contextStack2.size = size;
reset(vn);
vn.pop2();
try {
if (a != -1)
return vn.toString(a);
} catch (NavExceptionHuge e) {
}
return "";
}
/*
* (non-Javadoc)
*
* @see com.ximpleware.xpath.Expr#reset(com.ximpleware.VTDNav)
*/
public void reset(VTDNavHuge vn) {
// travese el list and reset every expression
e.reset(vn);
current = this;
UnionExpr tmp = this.next;
while (tmp != null) {
tmp.e.reset(vn);
tmp = tmp.next;
}
if (ih != null)
ih.reset();
state = 0;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
public String toString() {
// TODO Auto-generated method stub
if (this.next == null)
return this.e.toString();
else
return this.e.toString() + " | " + this.next.toString();
}
/*
* (non-Javadoc)
*
* @see com.ximpleware.xpath.Expr#isNumerical()
*/
public boolean isNumerical() {
// TODO Auto-generated method stub
return e.isNumerical();
}
/*
* (non-Javadoc)
*
* @see com.ximpleware.xpath.Expr#isNodeSet()
*/
public boolean isNodeSet() {
// TODO Auto-generated method stub
return e.isNodeSet();
}
/*
* (non-Javadoc)
*
* @see com.ximpleware.xpath.Expr#isString()
*/
public boolean isString() {
// TODO Auto-generated method stub
return e.isString();
}
/*
* (non-Javadoc)
*
* @see com.ximpleware.xpath.Expr#isBoolean()
*/
public boolean isBoolean() {
// TODO Auto-generated method stub
return e.isBoolean();
}
/*
* (non-Javadoc)
*
* @see com.ximpleware.xpath.Expr#requireContextSize()
*/
public boolean requireContextSize() {
// boolean b = false;
UnionExpr tmp = this;
while (tmp != null) {
if (tmp.e.requireContextSize()== true){
return true;
}
tmp = tmp.next;
}
return false;
}
/*
* (non-Javadoc)
*
* @see com.ximpleware.xpath.Expr#setContextSize(int)
*/
public void setContextSize(int size) {
current = this;
current.e.setContextSize(size);
UnionExpr tmp = this.next;
while (tmp != null) {
tmp.e.setContextSize(size);
tmp = tmp.next;
}
}
/*
* (non-Javadoc)
*
* @see com.ximpleware.xpath.Expr#setPosition(int)
*/
public void setPosition(int pos) {
current = this;
current.e.setPosition(pos);
UnionExpr tmp = this.next;
while (tmp != null) {
tmp.e.setPosition(pos);
tmp = tmp.next;
}
}
public boolean isUnique(int i) {
return ih.isUnique(i);
}
public int adjust(int n){
int i = e.adjust(n);
if (ih!=null && i==ih.e)
{}
else
ih = new intHash(i);
UnionExpr tmp = this.next;
while (tmp != null) {
tmp.e.adjust(n);
tmp = tmp.next;
}
return i;
}
}