| /* |
| * Copyright (c) 2004, 2011, 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. |
| * |
| * THIS FILE WAS MODIFIED BY SUN MICROSYSTEMS, INC. |
| */ |
| |
| package com.sun.xml.internal.fastinfoset.stax.events; |
| |
| import com.sun.xml.internal.fastinfoset.stax.*; |
| import java.util.NoSuchElementException; |
| import javax.xml.stream.XMLInputFactory; |
| import javax.xml.stream.XMLStreamException; |
| import javax.xml.stream.XMLStreamReader; |
| import javax.xml.stream.events.XMLEvent; |
| import javax.xml.stream.util.XMLEventAllocator; |
| import com.sun.xml.internal.fastinfoset.CommonResourceBundle; |
| |
| |
| |
| public class StAXEventReader implements javax.xml.stream.XMLEventReader{ |
| protected XMLStreamReader _streamReader ; |
| protected XMLEventAllocator _eventAllocator; |
| private XMLEvent _currentEvent; //the current event |
| private XMLEvent[] events = new XMLEvent[3]; |
| private int size = 3; |
| private int currentIndex = 0; |
| private boolean hasEvent = false; //true when current event exists, false initially & at end |
| |
| //only constructor will do because we delegate everything to underlying XMLStreamReader |
| public StAXEventReader(XMLStreamReader reader) throws XMLStreamException { |
| _streamReader = reader ; |
| _eventAllocator = (XMLEventAllocator)reader.getProperty(XMLInputFactory.ALLOCATOR); |
| if(_eventAllocator == null){ |
| _eventAllocator = new StAXEventAllocatorBase(); |
| } |
| //initialize |
| if (_streamReader.hasNext()) |
| { |
| _streamReader.next(); |
| _currentEvent =_eventAllocator.allocate(_streamReader); |
| events[0] = _currentEvent; |
| hasEvent = true; |
| } else { |
| throw new XMLStreamException(CommonResourceBundle.getInstance().getString("message.noElement")); |
| } |
| } |
| |
| public boolean hasNext() { |
| return hasEvent; |
| } |
| |
| public XMLEvent nextEvent() throws XMLStreamException { |
| XMLEvent event = null; |
| XMLEvent nextEvent = null; |
| if (hasEvent) |
| { |
| event = events[currentIndex]; |
| events[currentIndex] = null; |
| if (_streamReader.hasNext()) |
| { |
| //advance and read the next |
| _streamReader.next(); |
| nextEvent = _eventAllocator.allocate(_streamReader); |
| if (++currentIndex==size) |
| currentIndex = 0; |
| events[currentIndex] = nextEvent; |
| hasEvent = true; |
| } else { |
| _currentEvent = null; |
| hasEvent = false; |
| } |
| return event; |
| } |
| else{ |
| throw new NoSuchElementException(); |
| } |
| } |
| |
| public void remove(){ |
| //stream reader is read-only. |
| throw new java.lang.UnsupportedOperationException(); |
| } |
| |
| |
| public void close() throws XMLStreamException { |
| _streamReader.close(); |
| } |
| |
| /** Reads the content of a text-only element. Precondition: |
| * the current event is START_ELEMENT. Postcondition: |
| * The current event is the corresponding END_ELEMENT. |
| * @throws XMLStreamException if the current event is not a START_ELEMENT |
| * or if a non text element is encountered |
| */ |
| public String getElementText() throws XMLStreamException { |
| if(!hasEvent) { |
| throw new NoSuchElementException(); |
| } |
| |
| if(!_currentEvent.isStartElement()) { |
| StAXDocumentParser parser = (StAXDocumentParser)_streamReader; |
| return parser.getElementText(true); |
| } else { |
| return _streamReader.getElementText(); |
| } |
| } |
| |
| /** Get the value of a feature/property from the underlying implementation |
| * @param name The name of the property |
| * @return The value of the property |
| * @throws IllegalArgumentException if the property is not supported |
| */ |
| public Object getProperty(java.lang.String name) throws java.lang.IllegalArgumentException { |
| return _streamReader.getProperty(name) ; |
| } |
| |
| /** Skips any insignificant space events until a START_ELEMENT or |
| * END_ELEMENT is reached. If anything other than space characters are |
| * encountered, an exception is thrown. This method should |
| * be used when processing element-only content because |
| * the parser is not able to recognize ignorable whitespace if |
| * the DTD is missing or not interpreted. |
| * @throws XMLStreamException if anything other than space characters are encountered |
| */ |
| public XMLEvent nextTag() throws XMLStreamException { |
| if(!hasEvent) { |
| throw new NoSuchElementException(); |
| } |
| StAXDocumentParser parser = (StAXDocumentParser)_streamReader; |
| parser.nextTag(true); |
| return _eventAllocator.allocate(_streamReader); |
| } |
| |
| //XMLEventReader extends Iterator; |
| public Object next() { |
| try{ |
| return nextEvent(); |
| }catch(XMLStreamException streamException){ |
| return null; |
| } |
| } |
| |
| public XMLEvent peek() throws XMLStreamException{ |
| if (!hasEvent) |
| throw new XMLStreamException(CommonResourceBundle.getInstance().getString("message.noElement")); |
| _currentEvent = events[currentIndex]; |
| return _currentEvent; |
| } |
| |
| public void setAllocator(XMLEventAllocator allocator) { |
| if (allocator == null) |
| throw new IllegalArgumentException(CommonResourceBundle.getInstance().getString("message.nullXMLEventAllocator")); |
| |
| _eventAllocator = allocator; |
| } |
| |
| |
| } |