- /*
- * 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 1.14 2004/02/16 22:54:59 minchau 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();
- }
- }