| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 2001-2004 The Apache Software Foundation. |
| * |
| * Licensed 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: NthIterator.java,v 1.2.4.1 2005/09/06 09:57:04 pvedula Exp $ |
| */ |
| |
| package com.sun.org.apache.xalan.internal.xsltc.dom; |
| |
| import com.sun.org.apache.xalan.internal.xsltc.runtime.BasisLibrary; |
| import com.sun.org.apache.xml.internal.dtm.DTMAxisIterator; |
| import com.sun.org.apache.xml.internal.dtm.ref.DTMAxisIteratorBase; |
| |
| /** |
| * @author Jacek Ambroziak |
| * @author Morten Jorgensen |
| */ |
| public final class NthIterator extends DTMAxisIteratorBase { |
| // ...[N] |
| private DTMAxisIterator _source; |
| private final int _position; |
| private boolean _ready; |
| |
| public NthIterator(DTMAxisIterator source, int n) { |
| _source = source; |
| _position = n; |
| } |
| |
| public void setRestartable(boolean isRestartable) { |
| _isRestartable = isRestartable; |
| _source.setRestartable(isRestartable); |
| } |
| |
| public DTMAxisIterator cloneIterator() { |
| try { |
| final NthIterator clone = (NthIterator) super.clone(); |
| clone._source = _source.cloneIterator(); // resets source |
| clone._isRestartable = false; |
| return clone; |
| } |
| catch (CloneNotSupportedException e) { |
| BasisLibrary.runTimeError(BasisLibrary.ITERATOR_CLONE_ERR, |
| e.toString()); |
| return null; |
| } |
| } |
| |
| public int next() { |
| if (_ready) { |
| _ready = false; |
| return _source.getNodeByPosition(_position); |
| } |
| return DTMAxisIterator.END; |
| /* |
| if (_ready && _position > 0) { |
| final int pos = _source.isReverse() |
| ? _source.getLast() - _position + 1 |
| : _position; |
| |
| _ready = false; |
| int node; |
| while ((node = _source.next()) != DTMAxisIterator.END) { |
| if (pos == _source.getPosition()) { |
| return node; |
| } |
| } |
| } |
| return DTMAxisIterator.END; |
| */ |
| } |
| |
| public DTMAxisIterator setStartNode(final int node) { |
| if (_isRestartable) { |
| _source.setStartNode(node); |
| _ready = true; |
| } |
| return this; |
| } |
| |
| public DTMAxisIterator reset() { |
| _source.reset(); |
| _ready = true; |
| return this; |
| } |
| |
| public int getLast() { |
| return 1; |
| } |
| |
| public int getPosition() { |
| return 1; |
| } |
| |
| public void setMark() { |
| _source.setMark(); |
| } |
| |
| public void gotoMark() { |
| _source.gotoMark(); |
| } |
| } |