- /*
- * 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: SingletonIterator.java,v 1.4 2004/02/16 22:54:59 minchau Exp $
- */
-
- package com.sun.org.apache.xalan.internal.xsltc.dom;
-
- import com.sun.org.apache.xml.internal.dtm.DTMAxisIterator;
- import com.sun.org.apache.xml.internal.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;
- }
- }