| /** |
| * 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 org.apache.xml.security.stax.impl; |
| |
| import org.apache.xml.security.stax.ext.stax.XMLSecEvent; |
| |
| import javax.xml.stream.XMLEventReader; |
| import javax.xml.stream.XMLStreamException; |
| import javax.xml.stream.events.XMLEvent; |
| import java.util.Deque; |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| |
| /** |
| */ |
| public class XMLSecurityEventReader implements XMLEventReader { |
| |
| private final Iterator<XMLSecEvent> xmlSecEventIterator; |
| private XMLEvent xmlSecEvent; |
| |
| public XMLSecurityEventReader(Deque<XMLSecEvent> xmlSecEvents, int fromIndex) { |
| this.xmlSecEventIterator = xmlSecEvents.descendingIterator(); |
| int curIdx = 0; |
| while (curIdx++ < fromIndex) { |
| this.xmlSecEventIterator.next(); |
| } |
| } |
| |
| @Override |
| public XMLEvent nextEvent() throws XMLStreamException { |
| if (this.xmlSecEvent != null) { |
| final XMLEvent currentXMLEvent = this.xmlSecEvent; |
| this.xmlSecEvent = null; |
| return currentXMLEvent; |
| } |
| final XMLEvent currentXMLEvent; |
| try { |
| currentXMLEvent = xmlSecEventIterator.next(); |
| } catch (NoSuchElementException e) { |
| throw new XMLStreamException(e); |
| } |
| return currentXMLEvent; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| if (this.xmlSecEvent != null) { |
| return true; |
| } |
| return xmlSecEventIterator.hasNext(); |
| } |
| |
| @Override |
| public XMLEvent peek() throws XMLStreamException { |
| if (this.xmlSecEvent != null) { |
| return this.xmlSecEvent; |
| } |
| try { |
| this.xmlSecEvent = xmlSecEventIterator.next(); |
| return this.xmlSecEvent; |
| } catch (NoSuchElementException e) { |
| return null; |
| } |
| } |
| |
| @Override |
| public String getElementText() throws XMLStreamException { |
| //ATM not needed and therefore not implemented |
| throw new XMLStreamException(new UnsupportedOperationException()); |
| } |
| |
| @Override |
| public XMLEvent nextTag() throws XMLStreamException { |
| //ATM not needed and therefore not implemented |
| throw new XMLStreamException(new UnsupportedOperationException()); |
| } |
| |
| @Override |
| public Object getProperty(String name) throws IllegalArgumentException { |
| //ATM not needed and therefore not implemented |
| throw new IllegalArgumentException(new UnsupportedOperationException()); |
| } |
| |
| @Override |
| public void close() throws XMLStreamException { |
| //nop |
| } |
| |
| @Override |
| public Object next() { |
| try { |
| return nextEvent(); |
| } catch (XMLStreamException e) { |
| throw new NoSuchElementException(e.getMessage()); |
| } |
| } |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| } |