| /******************************************************************************* |
| * Copyright (c) 2011 Mukul Gandhi, and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Mukul Gandhi - initial API and implementation |
| * Bug 338494 - prohibiting xpath expressions starting with / or // to be parsed. |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal; |
| |
| public class XPathCupRestricted extends XPathCup { |
| |
| /** Default constructor. */ |
| public XPathCupRestricted() {super();} |
| |
| /** Constructor which sets the default scanner. */ |
| public XPathCupRestricted(java_cup.runtime.Scanner s) {super(s);} |
| |
| /** Invoke a user supplied parse action. */ |
| public java_cup.runtime.Symbol do_action( |
| int act_num, |
| java_cup.runtime.lr_parser parser, |
| java.util.Stack stack, |
| int top) |
| throws java.lang.Exception |
| { |
| if (act_num == 67 || act_num == 68 || act_num == 69) { |
| // these action numbers correspond to following grammar productions, |
| // a) FORWARD_SLASH |
| // b) FORWARD_SLASH RelativePathExpr |
| // c) FORWARD_SLASHSLASH RelativePathExpr |
| throw new Exception("Expression starts with / or //"); |
| } |
| else { |
| return action_obj.CUP$XPathCup$do_action(act_num, parser, stack, top); |
| } |
| } |
| |
| } |
| |
