| /******************************************************************************* |
| * Copyright (c) 2005, 2009 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 |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal.ast; |
| |
| import java.util.*; |
| |
| /** |
| * Class for AxisStep, this generates a sequence of zero or more nodes. These |
| * nodes are always returned in Document Order. This can be Forward Step or |
| * Reverse Step. |
| */ |
| public class AxisStep extends StepExpr { |
| private Step _step; |
| private Collection _exprs; |
| |
| /** |
| * Constructor for AxisStep. |
| * |
| * @param step |
| * Defines forward/reverse step. |
| * @param exprs |
| * Collection of xpath expressions. |
| */ |
| public AxisStep(Step step, Collection exprs) { |
| _step = step; |
| _exprs = exprs; |
| } |
| |
| /** |
| * Support for Visitor interface. |
| * |
| * @return Result of Visitor operation. |
| */ |
| @Override |
| public Object accept(XPathVisitor v) { |
| return v.visit(this); |
| } |
| |
| /** |
| * Advances to next step. |
| * |
| * @return Previous step. |
| */ |
| public Step step() { |
| return _step; |
| } |
| |
| /** |
| * Set the step direction. |
| */ |
| public void set_step(Step s) { |
| _step = s; |
| } |
| |
| /** |
| * Interator. |
| * |
| * @return Iterated expressions. |
| */ |
| public Iterator iterator() { |
| return _exprs.iterator(); |
| } |
| |
| /** |
| * Determines size of expressions. |
| * |
| * @return Size of expressions. |
| */ |
| public int predicate_count() { |
| return _exprs.size(); |
| } |
| } |