| /******************************************************************************* |
| * Copyright (c) 2005, 2010 Andrea Bittau, University College London, 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: |
| * Andrea Bittau - initial API and implementation from the PsychoPath XPath 2.0 |
| * Mukul Gandhi - bug 280798 - PsychoPath support for JDK 1.4 |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal.ast; |
| |
| /** |
| * Path expression walks tries to walk the path specified in its argument |
| */ |
| public class XPathExpr extends Expr { |
| private int _slashes; |
| private StepExpr _expr; |
| |
| // single linked list |
| private XPathExpr _next; |
| |
| /** |
| * @param slashes |
| * is copied to _slashes |
| * @param expr |
| * is copied to _expr _next is made null as a result. |
| */ |
| public XPathExpr(int slashes, StepExpr expr) { |
| _slashes = slashes; |
| _expr = expr; |
| _next = null; |
| } |
| |
| /** |
| * Support for Visitor interface. |
| * |
| * @return Result of Visitor operation. |
| */ |
| public Object accept(XPathVisitor v) { |
| return v.visit(this); |
| } |
| |
| /** |
| * Add to tail of path |
| */ |
| // XXX: keep ref to last |
| public void add_tail(int slashes, StepExpr expr) { |
| XPathExpr last = this; |
| XPathExpr next = _next; |
| |
| while (next != null) { |
| last = next; |
| next = last.next(); |
| } |
| |
| XPathExpr item = new XPathExpr(slashes, expr); |
| last.set_next(item); |
| |
| } |
| |
| /** |
| * @param count |
| * is copied to _slashes |
| */ |
| public void set_slashes(int count) { |
| _slashes = count; |
| } |
| |
| /** |
| * @return XPath expression _next |
| */ |
| public XPathExpr next() { |
| return _next; |
| } |
| |
| /** |
| * an XPath expression, n is copied to _next |
| */ |
| public void set_next(XPathExpr n) { |
| _next = n; |
| } |
| |
| /** |
| * @return Step expression _expr |
| */ |
| public StepExpr expr() { |
| return _expr; |
| } |
| |
| /** |
| * @return int _slashes |
| */ |
| public int slashes() { |
| return _slashes; |
| } |
| |
| } |