| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * $Id$ |
| */ |
| |
| package org.apache.xalan.xsltc.dom; |
| |
| import org.apache.xml.dtm.DTMAxisIterator; |
| import org.apache.xml.dtm.ref.DTMAxisIteratorBase; |
| |
| /** |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| */ |
| public class SingletonIterator extends DTMAxisIteratorBase { |
| private int _node; |
| private final boolean _isConstant; |
| |
| public SingletonIterator() { |
| this(Integer.MIN_VALUE, false); |
| } |
| |
| public SingletonIterator(int node) { |
| this(node, false); |
| } |
| |
| public SingletonIterator(int node, boolean constant) { |
| _node = _startNode = node; |
| _isConstant = constant; |
| } |
| |
| /** |
| * Override the value of <tt>_node</tt> only when this |
| * object was constructed using the empty constructor. |
| */ |
| public DTMAxisIterator setStartNode(int node) { |
| if (_isConstant) { |
| _node = _startNode; |
| return resetPosition(); |
| } |
| else if (_isRestartable) { |
| if (_node <= 0) |
| _node = _startNode = node; |
| return resetPosition(); |
| } |
| return this; |
| } |
| |
| public DTMAxisIterator reset() { |
| if (_isConstant) { |
| _node = _startNode; |
| return resetPosition(); |
| } |
| else { |
| final boolean temp = _isRestartable; |
| _isRestartable = true; |
| setStartNode(_startNode); |
| _isRestartable = temp; |
| } |
| return this; |
| } |
| |
| public int next() { |
| final int result = _node; |
| _node = DTMAxisIterator.END; |
| return returnNode(result); |
| } |
| |
| public void setMark() { |
| _markedNode = _node; |
| } |
| |
| public void gotoMark() { |
| _node = _markedNode; |
| } |
| } |