| /* |
| * Copyright 2006 Sun Microsystems, Inc. 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. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| package com.sun.xml.internal.xsom.parser; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| |
| import javax.xml.parsers.ParserConfigurationException; |
| import javax.xml.parsers.SAXParserFactory; |
| |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.EntityResolver; |
| import org.xml.sax.ErrorHandler; |
| import org.xml.sax.InputSource; |
| import org.xml.sax.Locator; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.SAXParseException; |
| import org.xml.sax.XMLReader; |
| 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 { |
| |
| private final SAXParserFactory factory; |
| |
| public JAXPParser( SAXParserFactory factory ) { |
| factory.setNamespaceAware(true); // just in case |
| this.factory = factory; |
| } |
| |
| public JAXPParser() { |
| this( SAXParserFactory.newInstance()); |
| } |
| |
| |
| |
| |
| |
| |
| |
| public void parse( InputSource source, ContentHandler handler, |
| ErrorHandler errorHandler, EntityResolver entityResolver ) |
| |
| throws SAXException, IOException { |
| |
| try { |
| XMLReader reader = factory.newSAXParser().getXMLReader(); |
| reader = new XMLReaderEx(reader); |
| |
| 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; |
| } |
| } |
| |
| |
| |
| /** |
| * 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. |
| */ |
| 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; |
| } |
| } |
| |
| public void setDocumentLocator(Locator locator) { |
| super.setDocumentLocator(locator); |
| this.locator = locator; |
| } |
| } |
| } |