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/*
 * The MIT License
 * Copyright (c) 2012 Microsoft Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package microsoft.exchange.webservices.data.core;

import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

/**
 * Represents an xml reader used by the ExchangeService to parse multi-response streams,
 * such as GetStreamingEvents.
 * 

* Necessary because the basic EwsServiceXmlReader does not * use normalization (see E14:60369), and in order to turn normalization off, it is * necessary to use an XmlTextReader, which does not allow the ConformanceLevel.Auto that * a multi-response stream requires. * If ever there comes a time we need to deal with multi-response streams with user-generated * content, we will need to tackle that parsing problem separately. *

*/ public class EwsServiceMultiResponseXmlReader extends EwsServiceXmlReader { /** * Initializes a new instance of the * EwsServiceMultiResponseXmlReader class. * * @param stream The stream. * @param service The service. * @throws Exception */ private EwsServiceMultiResponseXmlReader(InputStream stream, ExchangeService service) throws Exception { super(stream, service); } /** * Creates a new instance of the EwsServiceMultiResponseXmlReader class. * * @param stream the stream * @param service the service * @return an instance of EwsServiceMultiResponseXmlReader wrapped around the input stream * @throws Exception on error */ public static EwsServiceMultiResponseXmlReader create(InputStream stream, ExchangeService service) throws Exception { return new EwsServiceMultiResponseXmlReader(stream, service); } /** * Creates the XML reader. * * @param stream The stream * @return an XML reader to use * @throws XMLStreamException the XML stream exception */ private static XMLEventReader createXmlReader(InputStream stream) throws XMLStreamException { // E14:240522 The ProhibitDtd property is used to indicate whether XmlReader should process DTDs or not. By default, // it will do so. EWS doesn't use DTD references so we want to turn this off. Also, the XmlResolver property is // set to an instance of XmlUrlResolver by default. We don't want XmlTextReader to try to resolve this DTD reference // so we disable the XmlResolver as well. XMLInputFactory inputFactory = XMLInputFactory.newInstance(); InputStreamReader isr = new InputStreamReader(stream); BufferedReader in = new BufferedReader(isr); return inputFactory.createXMLEventReader(in); } /** * Initializes the XML reader. * * @param stream The stream. An XML reader to use. * @throws Exception on error */ @Override protected XMLEventReader initializeXmlReader(InputStream stream) throws Exception { return createXmlReader(stream); } }




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