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package com.sun.xml.bind.v2.runtime.unmarshaller;
import javax.activation.DataHandler;
import javax.xml.bind.attachment.AttachmentUnmarshaller;
import javax.xml.namespace.NamespaceContext;
import com.sun.xml.bind.v2.WellKnownNamespace;
import org.xml.sax.SAXException;
/**
* Decorator of {@link XmlVisitor} that performs XOP processing.
* Used to support MTOM.
*
* @author Kohsuke Kawaguchi
*/
final class MTOMDecorator implements XmlVisitor {
private final XmlVisitor next;
private final AttachmentUnmarshaller au;
private UnmarshallerImpl parent;
private final Base64Data base64data = new Base64Data();
/**
* True if we are between the start and the end of xop:Include
*/
private boolean inXopInclude;
/**
* UGLY HACK: we need to ignore the whitespace that follows
* the attached base64 image.
*
* This happens twice; once before {@code </xop:Include>}, another
* after {@code </xop:Include>}. The spec guarantees that
* no valid pcdata can follow {@code </xop:Include>}.
*/
private boolean followXop;
public MTOMDecorator(UnmarshallerImpl parent,XmlVisitor next, AttachmentUnmarshaller au) {
this.parent = parent;
this.next = next;
this.au = au;
}
public void startDocument(LocatorEx loc, NamespaceContext nsContext) throws SAXException {
next.startDocument(loc,nsContext);
}
public void endDocument() throws SAXException {
next.endDocument();
}
public void startElement(TagName tagName) throws SAXException {
if(tagName.local.equals("Include") && tagName.uri.equals(WellKnownNamespace.XOP)) {
// found xop:Include
String href = tagName.atts.getValue("href");
DataHandler attachment = au.getAttachmentAsDataHandler(href);
if(attachment==null) {
// report an error and ignore
parent.getEventHandler().handleEvent(null);
// TODO
}
base64data.set(attachment);
next.text(base64data);
inXopInclude = true;
followXop = true;
} else
next.startElement(tagName);
}
public void endElement(TagName tagName) throws SAXException {
if(inXopInclude) {
// consume </xop:Include> by ourselves.
inXopInclude = false;
followXop = true;
return;
}
next.endElement(tagName);
}
public void startPrefixMapping(String prefix, String nsUri) throws SAXException {
next.startPrefixMapping(prefix,nsUri);
}
public void endPrefixMapping(String prefix) throws SAXException {
next.endPrefixMapping(prefix);
}
public void text( CharSequence pcdata ) throws SAXException {
if(!followXop)
next.text(pcdata);
else
followXop = false;
}
public UnmarshallingContext getContext() {
return next.getContext();
}
public TextPredictor getPredictor() {
return next.getPredictor();
}
}