aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.bind.v2.runtime.unmarshaller;
aoqi@0: 
aoqi@0: import javax.activation.DataHandler;
aoqi@0: import javax.xml.bind.attachment.AttachmentUnmarshaller;
aoqi@0: import javax.xml.namespace.NamespaceContext;
aoqi@0: 
aoqi@0: import com.sun.xml.internal.bind.v2.WellKnownNamespace;
aoqi@0: 
aoqi@0: import org.xml.sax.SAXException;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * Decorator of {@link XmlVisitor} that performs XOP processing.
aoqi@0:  * Used to support MTOM.
aoqi@0:  *
aoqi@0:  * @author Kohsuke Kawaguchi
aoqi@0:  */
aoqi@0: final class MTOMDecorator implements XmlVisitor {
aoqi@0: 
aoqi@0:     private final XmlVisitor next;
aoqi@0: 
aoqi@0:     private final AttachmentUnmarshaller au;
aoqi@0: 
aoqi@0:     private UnmarshallerImpl parent;
aoqi@0: 
aoqi@0:     private final Base64Data base64data = new Base64Data();
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * True if we are between the start and the end of xop:Include
aoqi@0:      */
aoqi@0:     private boolean inXopInclude;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * UGLY HACK: we need to ignore the whitespace that follows
aoqi@0:      * the attached base64 image.
aoqi@0:      *
aoqi@0:      * This happens twice; once before </xop:Include>, another
aoqi@0:      * after </xop:Include>. The spec guarantees that
aoqi@0:      * no valid pcdata can follow </xop:Include>.
aoqi@0:      */
aoqi@0:     private boolean followXop;
aoqi@0: 
aoqi@0:     public MTOMDecorator(UnmarshallerImpl parent,XmlVisitor next, AttachmentUnmarshaller au) {
aoqi@0:         this.parent = parent;
aoqi@0:         this.next = next;
aoqi@0:         this.au = au;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void startDocument(LocatorEx loc, NamespaceContext nsContext) throws SAXException {
aoqi@0:         next.startDocument(loc,nsContext);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void endDocument() throws SAXException {
aoqi@0:         next.endDocument();
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void startElement(TagName tagName) throws SAXException {
aoqi@0:         if(tagName.local.equals("Include") && tagName.uri.equals(WellKnownNamespace.XOP)) {
aoqi@0:             // found xop:Include
aoqi@0:             String href = tagName.atts.getValue("href");
aoqi@0:             DataHandler attachment = au.getAttachmentAsDataHandler(href);
aoqi@0:             if(attachment==null) {
aoqi@0:                 // report an error and ignore
aoqi@0:                 parent.getEventHandler().handleEvent(null);
aoqi@0:                 // TODO
aoqi@0:             }
aoqi@0:             base64data.set(attachment);
aoqi@0:             next.text(base64data);
aoqi@0:             inXopInclude = true;
aoqi@0:             followXop = true;
aoqi@0:         } else
aoqi@0:             next.startElement(tagName);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void endElement(TagName tagName) throws SAXException {
aoqi@0:         if(inXopInclude) {
aoqi@0:             // consume </xop:Include> by ourselves.
aoqi@0:             inXopInclude = false;
aoqi@0:             followXop = true;
aoqi@0:             return;
aoqi@0:         }
aoqi@0:         next.endElement(tagName);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void startPrefixMapping(String prefix, String nsUri) throws SAXException {
aoqi@0:         next.startPrefixMapping(prefix,nsUri);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void endPrefixMapping(String prefix) throws SAXException {
aoqi@0:         next.endPrefixMapping(prefix);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void text( CharSequence pcdata ) throws SAXException {
aoqi@0:         if(!followXop)
aoqi@0:             next.text(pcdata);
aoqi@0:         else
aoqi@0:             followXop = false;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public UnmarshallingContext getContext() {
aoqi@0:         return next.getContext();
aoqi@0:     }
aoqi@0: 
aoqi@0:     public TextPredictor getPredictor() {
aoqi@0:         return next.getPredictor();
aoqi@0:     }
aoqi@0: }