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src/share/jaxws_classes/com/sun/xml/internal/fastinfoset/stax/events/StAXEventReader.java@e530533619ec (annotated)

src/share/jaxws_classes/com/sun/xml/internal/fastinfoset/stax/events/StAXEventReader.java

Thu, 12 Oct 2017 19:44:07 +0800

author

aoqi

date

Thu, 12 Oct 2017 19:44:07 +0800

changeset 760

e530533619ec

parent 0

373ffda63c9a

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2004, 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*
aoqi@0	25	* THIS FILE WAS MODIFIED BY SUN MICROSYSTEMS, INC.
aoqi@0	26	*/
aoqi@0	27
aoqi@0	28	package com.sun.xml.internal.fastinfoset.stax.events;
aoqi@0	29
aoqi@0	30	import com.sun.xml.internal.fastinfoset.stax.*;
aoqi@0	31	import java.util.NoSuchElementException;
aoqi@0	32	import javax.xml.stream.XMLInputFactory;
aoqi@0	33	import javax.xml.stream.XMLStreamException;
aoqi@0	34	import javax.xml.stream.XMLStreamReader;
aoqi@0	35	import javax.xml.stream.events.XMLEvent;
aoqi@0	36	import javax.xml.stream.util.XMLEventAllocator;
aoqi@0	37	import com.sun.xml.internal.fastinfoset.CommonResourceBundle;
aoqi@0	38
aoqi@0	39
aoqi@0	40
aoqi@0	41	public class StAXEventReader implements javax.xml.stream.XMLEventReader{
aoqi@0	42	protected XMLStreamReader _streamReader ;
aoqi@0	43	protected XMLEventAllocator _eventAllocator;
aoqi@0	44	private XMLEvent _currentEvent; //the current event
aoqi@0	45	private XMLEvent[] events = new XMLEvent[3];
aoqi@0	46	private int size = 3;
aoqi@0	47	private int currentIndex = 0;
aoqi@0	48	private boolean hasEvent = false; //true when current event exists, false initially & at end
aoqi@0	49
aoqi@0	50	//only constructor will do because we delegate everything to underlying XMLStreamReader
aoqi@0	51	public StAXEventReader(XMLStreamReader reader) throws XMLStreamException {
aoqi@0	52	_streamReader = reader ;
aoqi@0	53	_eventAllocator = (XMLEventAllocator)reader.getProperty(XMLInputFactory.ALLOCATOR);
aoqi@0	54	if(_eventAllocator == null){
aoqi@0	55	_eventAllocator = new StAXEventAllocatorBase();
aoqi@0	56	}
aoqi@0	57	//initialize
aoqi@0	58	if (_streamReader.hasNext())
aoqi@0	59	{
aoqi@0	60	_streamReader.next();
aoqi@0	61	_currentEvent =_eventAllocator.allocate(_streamReader);
aoqi@0	62	events[0] = _currentEvent;
aoqi@0	63	hasEvent = true;
aoqi@0	64	} else {
aoqi@0	65	throw new XMLStreamException(CommonResourceBundle.getInstance().getString("message.noElement"));
aoqi@0	66	}
aoqi@0	67	}
aoqi@0	68
aoqi@0	69	public boolean hasNext() {
aoqi@0	70	return hasEvent;
aoqi@0	71	}
aoqi@0	72
aoqi@0	73	public XMLEvent nextEvent() throws XMLStreamException {
aoqi@0	74	XMLEvent event = null;
aoqi@0	75	XMLEvent nextEvent = null;
aoqi@0	76	if (hasEvent)
aoqi@0	77	{
aoqi@0	78	event = events[currentIndex];
aoqi@0	79	events[currentIndex] = null;
aoqi@0	80	if (_streamReader.hasNext())
aoqi@0	81	{
aoqi@0	82	//advance and read the next
aoqi@0	83	_streamReader.next();
aoqi@0	84	nextEvent = _eventAllocator.allocate(_streamReader);
aoqi@0	85	if (++currentIndex==size)
aoqi@0	86	currentIndex = 0;
aoqi@0	87	events[currentIndex] = nextEvent;
aoqi@0	88	hasEvent = true;
aoqi@0	89	} else {
aoqi@0	90	_currentEvent = null;
aoqi@0	91	hasEvent = false;
aoqi@0	92	}
aoqi@0	93	return event;
aoqi@0	94	}
aoqi@0	95	else{
aoqi@0	96	throw new NoSuchElementException();
aoqi@0	97	}
aoqi@0	98	}
aoqi@0	99
aoqi@0	100	public void remove(){
aoqi@0	101	//stream reader is read-only.
aoqi@0	102	throw new java.lang.UnsupportedOperationException();
aoqi@0	103	}
aoqi@0	104
aoqi@0	105
aoqi@0	106	public void close() throws XMLStreamException {
aoqi@0	107	_streamReader.close();
aoqi@0	108	}
aoqi@0	109
aoqi@0	110	/** Reads the content of a text-only element. Precondition:
aoqi@0	111	* the current event is START_ELEMENT. Postcondition:
aoqi@0	112	* The current event is the corresponding END_ELEMENT.
aoqi@0	113	* @throws XMLStreamException if the current event is not a START_ELEMENT
aoqi@0	114	* or if a non text element is encountered
aoqi@0	115	*/
aoqi@0	116	public String getElementText() throws XMLStreamException {
aoqi@0	117	if(!hasEvent) {
aoqi@0	118	throw new NoSuchElementException();
aoqi@0	119	}
aoqi@0	120
aoqi@0	121	if(!_currentEvent.isStartElement()) {
aoqi@0	122	StAXDocumentParser parser = (StAXDocumentParser)_streamReader;
aoqi@0	123	return parser.getElementText(true);
aoqi@0	124	} else {
aoqi@0	125	return _streamReader.getElementText();
aoqi@0	126	}
aoqi@0	127	}
aoqi@0	128
aoqi@0	129	/** Get the value of a feature/property from the underlying implementation
aoqi@0	130	* @param name The name of the property
aoqi@0	131	* @return The value of the property
aoqi@0	132	* @throws IllegalArgumentException if the property is not supported
aoqi@0	133	*/
aoqi@0	134	public Object getProperty(java.lang.String name) throws java.lang.IllegalArgumentException {
aoqi@0	135	return _streamReader.getProperty(name) ;
aoqi@0	136	}
aoqi@0	137
aoqi@0	138	/** Skips any insignificant space events until a START_ELEMENT or
aoqi@0	139	* END_ELEMENT is reached. If anything other than space characters are
aoqi@0	140	* encountered, an exception is thrown. This method should
aoqi@0	141	* be used when processing element-only content because
aoqi@0	142	* the parser is not able to recognize ignorable whitespace if
aoqi@0	143	* the DTD is missing or not interpreted.
aoqi@0	144	* @throws XMLStreamException if anything other than space characters are encountered
aoqi@0	145	*/
aoqi@0	146	public XMLEvent nextTag() throws XMLStreamException {
aoqi@0	147	if(!hasEvent) {
aoqi@0	148	throw new NoSuchElementException();
aoqi@0	149	}
aoqi@0	150	StAXDocumentParser parser = (StAXDocumentParser)_streamReader;
aoqi@0	151	parser.nextTag(true);
aoqi@0	152	return _eventAllocator.allocate(_streamReader);
aoqi@0	153	}
aoqi@0	154
aoqi@0	155	//XMLEventReader extends Iterator;
aoqi@0	156	public Object next() {
aoqi@0	157	try{
aoqi@0	158	return nextEvent();
aoqi@0	159	}catch(XMLStreamException streamException){
aoqi@0	160	return null;
aoqi@0	161	}
aoqi@0	162	}
aoqi@0	163
aoqi@0	164	public XMLEvent peek() throws XMLStreamException{
aoqi@0	165	if (!hasEvent)
aoqi@0	166	throw new XMLStreamException(CommonResourceBundle.getInstance().getString("message.noElement"));
aoqi@0	167	_currentEvent = events[currentIndex];
aoqi@0	168	return _currentEvent;
aoqi@0	169	}
aoqi@0	170
aoqi@0	171	public void setAllocator(XMLEventAllocator allocator) {
aoqi@0	172	if (allocator == null)
aoqi@0	173	throw new IllegalArgumentException(CommonResourceBundle.getInstance().getString("message.nullXMLEventAllocator"));
aoqi@0	174
aoqi@0	175	_eventAllocator = allocator;
aoqi@0	176	}
aoqi@0	177
aoqi@0	178
aoqi@0	179	}