content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE 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 for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * Copyright (c) 2005, 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 jaxp.sun.xml.internal.stream;
  
  import java.util.NoSuchElementException;
  import jaxp.xml.stream.EventFilter;
  import jaxp.xml.stream.XMLEventReader;
  import jaxp.xml.stream.XMLStreamException;
  import jaxp.xml.stream.events.XMLEvent;
  import jaxp.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{
          if(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;
              }
              else{
                  return nextEvent();
              }
          }else{
              throw new NoSuchElementException();
          }
      }//nextEvent()
  
       public XMLEvent nextTag() throws XMLStreamException{
           if(super.hasNext()){
               XMLEvent event = super.nextTag();
               //if the filter accepts this event return this event.
               if(fEventFilter.accept(event)){
                  return event;
               }
               else{
                  return nextTag();
               }
           }else{
               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
  