Mercurial > jdk8-mips64-public > jaxws / file revision

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  * Copyright (c) 1997, 2013, 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

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 package com.sun.xml.internal.xsom.parser;

 import java.io.IOException;

 import java.net.URL;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 import javax.xml.parsers.ParserConfigurationException;

 import javax.xml.parsers.SAXParser;

 import javax.xml.parsers.SAXParserFactory;

 import org.xml.sax.*;

 import org.xml.sax.helpers.XMLFilterImpl;

 import com.sun.xml.internal.xsom.impl.parser.Messages;

 /**

  * Standard XMLParser implemented by using JAXP.

  *

  * @author

  *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)

  */

 public class JAXPParser implements XMLParser {

     // not in older JDK, so must be duplicated here, otherwise javax.xml.XMLConstants should be used

     private static final String ACCESS_EXTERNAL_SCHEMA = "http://javax.xml.XMLConstants/property/accessExternalSchema";

     private static final Logger LOGGER = Logger.getLogger(JAXPParser.class.getName());

     private final SAXParserFactory factory;

     public JAXPParser( SAXParserFactory factory ) {

         factory.setNamespaceAware(true);    // just in case

         this.factory = factory;

     }

     /**

      * @deprecated Unsafe, use JAXPParser(factory) instead with

      * security features initialized by setting

      * XMLConstants.FEATURE_SECURE_PROCESSING feature.

      */

     public JAXPParser() {

         this( SAXParserFactory.newInstance());

     }

     public void parse( InputSource source, ContentHandler handler,

         ErrorHandler errorHandler, EntityResolver entityResolver )

         throws SAXException, IOException {

         try {

             SAXParser saxParser = allowFileAccess(factory.newSAXParser(), false);

             XMLReader reader = new XMLReaderEx(saxParser.getXMLReader());

             reader.setContentHandler(handler);

             if(errorHandler!=null)

                 reader.setErrorHandler(errorHandler);

             if(entityResolver!=null)

                 reader.setEntityResolver(entityResolver);

             reader.parse(source);

         } catch( ParserConfigurationException e ) {

             // in practice this won't happen

             SAXParseException spe = new SAXParseException(e.getMessage(),null,e);

             errorHandler.fatalError(spe);

             throw spe;

         }

     }

     private static SAXParser allowFileAccess(SAXParser saxParser, boolean disableSecureProcessing) throws SAXException {

         // if feature secure processing enabled, nothing to do, file is allowed,

         // or user is able to control access by standard JAXP mechanisms

         if (disableSecureProcessing) {

             return saxParser;

         }

         try {

             saxParser.setProperty(ACCESS_EXTERNAL_SCHEMA, "file");

             LOGGER.log(Level.FINE, Messages.format(Messages.JAXP_SUPPORTED_PROPERTY, ACCESS_EXTERNAL_SCHEMA));

         } catch (SAXException ignored) {

             // nothing to do; support depends on version JDK or SAX implementation

             LOGGER.log(Level.CONFIG, Messages.format(Messages.JAXP_UNSUPPORTED_PROPERTY, ACCESS_EXTERNAL_SCHEMA), ignored);

         }

         return saxParser;

     }

     /**

      * XMLReader with improved error message for entity resolution failure.

      *

      * TODO: this class is completely stand-alone, so it shouldn't be

      * an inner class.

      */

     private static class XMLReaderEx extends XMLFilterImpl {

         private Locator locator;

         XMLReaderEx( XMLReader parent ) {

             this.setParent(parent);

         }

         /**

          * Resolves entities and reports user-friendly error messages.

          *

          * <p>

          * Some XML parser (at least Xerces) does not report much information

          * when it fails to resolve an entity, which is often quite

          * frustrating. For example, if you are behind a firewall and the

          * schema contains a reference to www.w3.org, and there is no

          * entity resolver, the parser will just throw an IOException

          * that doesn't contain any information about where that reference

          * occurs nor what it is accessing.

          *

          * <p>

          * By implementing an EntityResolver and resolving the reference

          * by ourselves, we can report an error message with all the

          * necessary information to fix the problem.

          *

          * <p>

          * Note that we still need to the client-specified entity resolver

          * to let the application handle entity resolution. Here we just catch

          * an IOException and add more information.

          */

         @Override

         public InputSource resolveEntity(String publicId, String systemId) throws SAXException {

             try {

                 InputSource is=null;

                 // ask the client-specified entity resolver first

                 if( this.getEntityResolver()!=null)

                     is = this.getEntityResolver().resolveEntity(publicId,systemId);

                 if( is!=null )  return is;  // if that succeeds, fine.

                 // rather than returning null, resolve it now

                 // so that we can detect errors.

                 is = new InputSource( new URL(systemId).openStream() );

                 is.setSystemId(systemId);

                 is.setPublicId(publicId);

                 return is;

             } catch( IOException e ) {

                 // catch this error and provide a nice error message, rather than

                 // just throwing this IOException.

                 SAXParseException spe = new SAXParseException(

                     Messages.format(Messages.ERR_ENTITY_RESOLUTION_FAILURE,

                         systemId, e.toString()),    // use the toString method to get the class name

                     locator, e );

                 if(this.getErrorHandler()!=null)

                     this.getErrorHandler().fatalError(spe);

                 throw spe;

             }

         }

         @Override

         public void setDocumentLocator(Locator locator) {

             super.setDocumentLocator(locator);

             this.locator = locator;

         }

     }

 }