| /* |
| * Copyright (c) 2005, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.xml.internal.stream; |
| |
| import java.util.NoSuchElementException; |
| import javax.xml.stream.EventFilter; |
| import javax.xml.stream.XMLEventReader; |
| import javax.xml.stream.XMLStreamException; |
| import javax.xml.stream.events.XMLEvent; |
| import javax.xml.stream.util.EventReaderDelegate; |
| |
| /** |
| * |
| * @author Neeraj Bajaj, Sun Microsystems |
| * |
| */ |
| public class EventFilterSupport extends EventReaderDelegate { |
| |
| //maintain a reference to EventFilter |
| EventFilter fEventFilter ; |
| /** Creates a new instance of EventFilterSupport */ |
| public EventFilterSupport(XMLEventReader eventReader, EventFilter eventFilter) { |
| setParent(eventReader); |
| fEventFilter = eventFilter; |
| } |
| |
| public Object next(){ |
| try{ |
| return nextEvent(); |
| }catch(XMLStreamException ex){ |
| throw new NoSuchElementException(); |
| } |
| } |
| |
| public boolean hasNext(){ |
| try{ |
| return peek() != null ? true : false ; |
| }catch(XMLStreamException ex){ |
| return false; |
| } |
| } |
| |
| public XMLEvent nextEvent()throws XMLStreamException{ |
| while (super.hasNext()) { |
| //get the next event by calling XMLEventReader |
| XMLEvent event = super.nextEvent(); |
| |
| //if this filter accepts this event then return this event |
| if(fEventFilter.accept(event)){ |
| return event; |
| } |
| } |
| throw new NoSuchElementException(); |
| }//nextEvent() |
| |
| public XMLEvent nextTag() throws XMLStreamException{ |
| while (super.hasNext()) { |
| XMLEvent event = super.nextTag(); |
| //if the filter accepts this event return this event. |
| if(fEventFilter.accept(event)){ |
| return event; |
| } |
| } |
| throw new NoSuchElementException(); |
| } |
| |
| public XMLEvent peek() throws XMLStreamException{ |
| while (true) { |
| XMLEvent event = super.peek(); |
| if(event == null)return null; |
| //if the filter accepts this event return this event. |
| if(fEventFilter.accept(event)){ |
| return event; |
| } |
| //call super.next(), and then peek again. |
| super.next(); |
| } |
| } |
| |
| }//EventFilterSupport |