| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * 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. |
| */ |
| |
| 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.DTMFilter; |
| import com.sun.org.apache.xml.internal.dtm.DTMIterator; |
| import com.sun.org.apache.xml.internal.dtm.ref.DTMAxisIteratorBase; |
| |
| /** |
| * Similar to a CurrentNodeListIterator except that the filter has a |
| * simpler interface (only needs the node, no position, last, etc.) |
| * It takes a source iterator and a Filter object and returns nodes |
| * from the source after filtering them by calling filter.test(node). |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| */ |
| public final class FilterIterator extends DTMAxisIteratorBase { |
| |
| /** |
| * Reference to source iterator. |
| */ |
| private DTMAxisIterator _source; |
| |
| /** |
| * Reference to a filter object that to be applied to each node. |
| */ |
| private final DTMFilter _filter; |
| |
| /** |
| * A flag indicating if position is reversed. |
| */ |
| private final boolean _isReverse; |
| |
| public FilterIterator(DTMAxisIterator source, DTMFilter filter) { |
| _source = source; |
| // System.out.println("FI souce = " + source + " this = " + this); |
| _filter = filter; |
| _isReverse = source.isReverse(); |
| } |
| |
| public boolean isReverse() { |
| return _isReverse; |
| } |
| |
| |
| public void setRestartable(boolean isRestartable) { |
| _isRestartable = isRestartable; |
| _source.setRestartable(isRestartable); |
| } |
| |
| public DTMAxisIterator cloneIterator() { |
| |
| try { |
| final FilterIterator clone = (FilterIterator) super.clone(); |
| clone._source = _source.cloneIterator(); |
| clone._isRestartable = false; |
| return clone.reset(); |
| } |
| catch (CloneNotSupportedException e) { |
| BasisLibrary.runTimeError(BasisLibrary.ITERATOR_CLONE_ERR, |
| e.toString()); |
| return null; |
| } |
| } |
| |
| public DTMAxisIterator reset() { |
| _source.reset(); |
| return resetPosition(); |
| } |
| |
| public int next() { |
| int node; |
| while ((node = _source.next()) != END) { |
| if (_filter.acceptNode(node, DTMFilter.SHOW_ALL) == DTMIterator.FILTER_ACCEPT) { |
| return returnNode(node); |
| } |
| } |
| return END; |
| } |
| |
| public DTMAxisIterator setStartNode(int node) { |
| if (_isRestartable) { |
| _source.setStartNode(_startNode = node); |
| return resetPosition(); |
| } |
| return this; |
| } |
| |
| public void setMark() { |
| _source.setMark(); |
| } |
| |
| public void gotoMark() { |
| _source.gotoMark(); |
| } |
| |
| } |