| /* |
| * @(#)$Id$ |
| * |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2001-2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 2001, Sun |
| * Microsystems., http://www.sun.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * |
| */ |
| |
| package org.apache.xalan.xsltc.dom; |
| |
| import org.apache.xalan.xsltc.runtime.BasisLibrary; |
| import org.apache.xml.dtm.DTMAxisIterator; |
| import org.apache.xml.dtm.DTMFilter; |
| import org.apache.xml.dtm.DTMIterator; |
| import org.apache.xml.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). |
| */ |
| 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(); |
| } |
| |
| } |