1/* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5/* 6 * Licensed to the Apache Software Foundation (ASF) under one or more 7 * contributor license agreements. See the NOTICE file distributed with 8 * this work for additional information regarding copyright ownership. 9 * The ASF licenses this file to You under the Apache License, Version 2.0 10 * (the "License"); you may not use this file except in compliance with 11 * the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 */ 21 22package com.sun.org.apache.xalan.internal.xsltc.dom; 23 24import com.sun.org.apache.xalan.internal.xsltc.runtime.BasisLibrary; 25import com.sun.org.apache.xml.internal.dtm.DTMAxisIterator; 26import com.sun.org.apache.xml.internal.dtm.ref.DTMAxisIteratorBase; 27import com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBase; 28 29/** 30 * Absolute iterators ignore the node that is passed to setStartNode(). 31 * Instead, they always start from the root node. The node passed to 32 * setStartNode() is not totally useless, though. It is needed to obtain the 33 * DOM mask, i.e. the index into the MultiDOM table that corresponds to the 34 * DOM "owning" the node. 35 * 36 * The DOM mask is cached, so successive calls to setStartNode() passing 37 * nodes from other DOMs will have no effect (i.e. this iterator cannot 38 * migrate between DOMs). 39 * @author Jacek Ambroziak 40 * @author Santiago Pericas-Geertsen 41 */ 42public final class AbsoluteIterator extends DTMAxisIteratorBase { 43 44 /** 45 * Source for this iterator. 46 */ 47 private DTMAxisIterator _source; 48 49 public AbsoluteIterator(DTMAxisIterator source) { 50 _source = source; 51// System.out.println("AI source = " + source + " this = " + this); 52 } 53 54 public void setRestartable(boolean isRestartable) { 55 _isRestartable = isRestartable; 56 _source.setRestartable(isRestartable); 57 } 58 59 public DTMAxisIterator setStartNode(int node) { 60 _startNode = DTMDefaultBase.ROOTNODE; 61 if (_isRestartable) { 62 _source.setStartNode(_startNode); 63 resetPosition(); 64 } 65 return this; 66 } 67 68 public int next() { 69 return returnNode(_source.next()); 70 } 71 72 public DTMAxisIterator cloneIterator() { 73 try { 74 final AbsoluteIterator clone = (AbsoluteIterator) super.clone(); 75 clone._source = _source.cloneIterator(); // resets source 76 clone.resetPosition(); 77 clone._isRestartable = false; 78 return clone; 79 } 80 catch (CloneNotSupportedException e) { 81 BasisLibrary.runTimeError(BasisLibrary.ITERATOR_CLONE_ERR, 82 e.toString()); 83 return null; 84 } 85 } 86 87 public DTMAxisIterator reset() { 88 _source.reset(); 89 return resetPosition(); 90 } 91 92 public void setMark() { 93 _source.setMark(); 94 } 95 96 public void gotoMark() { 97 _source.gotoMark(); 98 } 99} 100