Error from XMPSchemaMediaManagement createDerivedFrom() method

["Lindberg, Chris J." <li...@llnl.gov>]

Hello,

my goal is to create an updated set of XMP metadata but when I try to use the XMPSchemaMediaManagement createDerivedFrom() method I get an error:

Exception in thread "Thread-1" org.w3c.dom.DOMException: NAMESPACE_ERR: An attempt is made to create or change an object in a way which is incorrect with regard to namespaces.

when I use:
        ResourceRef derivedFromRef = destXmpMM.createDerivedFrom();

to create the DerivedFrom element as seen in the my method (source below)

    /**
     * Create new XMP Media Management schema from existing XMP Media Management schema data.
     *
     * @param xmpMM XMP Media Management schema extracted from original PDF
     */
    public void loadDestMediaManagmentSchema(XMPSchemaMediaManagement xmpMM) {
        // add XMPSchemaMediaManagment to destination XMP metadata
        XMPSchemaMediaManagement destXmpMM = destXmpMetadata.addMediaManagementSchema();

        // create DerivedFrom ResourceRef element from XMPSchemaMediaManagement object
        ResourceRef derivedFromRef = destXmpMM.createDerivedFrom();
        loadDerivedFromResourceRef(derivedFromRef, xmpMM.getTextProperty("xmpMM:InstanceID")));
        destXmpMM.setDerivedFrom(derivedFromRef);

        // add History ResourceEvents
        destXmpMM.addHistory(loadResourceEvent(destXmpMM, ResourceEvent.ACTION_EDITED, PLMLoader.AGENT_NAME));
        destXmpMM.addHistory(loadResourceEvent(destXmpMM, ResourceEvent.ACTION_MANAGED, PLMLoader.MANAGED_AGENT_NAME));

        destXmpMM.setDocumentID(xmpMM.getDocumentID());

    }

Watching the debugger I believe the error is caused because the new destination XMP Media Management element returns "rdf" as its prefix (from rdf:Description element that wraps the xmpMM content).
<rdf:Description xmlns:xmpMM="http://ns.adobe.com/xap/1.0/mm/">

How can I correct this and generate a DerivedFrom element?

Thanks in advance,

Chris

RE: Error from XMPSchemaMediaManagement createDerivedFrom() method

["Lindberg, Chris J." <li...@llnl.gov>]

Hello,

I have found that the jempbox ResourceRef constructor is failing a DOM namespace check.

After attaching the jempbox source code to the IDE I'm using I find that the error is occurring in the jempbox  ResourceRef constructor when it sets the name space attribute (parent.setAttributeNS()).
    public ResourceRef( Element parentElement )
    {
        parent = parentElement;
        if( !parent.hasAttribute( "xmlns:stRef" ) )
        {
            parent.setAttributeNS( 
                "http://ns.adobe.com/xap/1.0/sType/ResourceRef#", 
                "xmlns:stRef", 
                "http://ns.adobe.com/xap/1.0/sType/ResourceRef#" );
        }
    }

setAttributesNS ultimately runs a DOM namespace error check in  CoreDocumentImpl where it fails:
at com.sun.org.apache.xerces.internal.dom.CoreDocumentImpl.checkDOMNSErr(CoreDocumentImpl.java:2547) 

...
else if (
  prefix.equals("xmlns")
  && !namespace.equals(NamespaceContext.XMLNS_URI)
  || (!prefix.equals("xmlns")
  && namespace.equals(NamespaceContext.XMLNS_URI))) {
  String msg =
    DOMMessageFormatter.formatMessage(
    DOMMessageFormatter.DOM_DOMAIN,
    "NAMESPACE_ERR",
    null);
  throw new DOMException(DOMException.NAMESPACE_ERR, msg);
            }

when I run in debugger 
prefix equals "xmlns" and 
namespace equals "http://nsadobe.com/xap/1.0/sType/ResourceRef#"

The error is thrown because the checkDOMNSErr expects namespace to be equal to
"http://www.w3.0rg/2000/xmlns/"

Is this a bug?

Thanks,

Chris

-----Original Message-----
From: Lindberg, Chris J. [mailto:lindberg4@llnl.gov] 
Sent: Thursday, September 08, 2011 9:37 AM
To: users@pdfbox.apache.org
Subject: Error from XMPSchemaMediaManagement createDerivedFrom() method

Hello,

my goal is to create an updated set of XMP metadata but when I try to use the XMPSchemaMediaManagement createDerivedFrom() method I get an error:

Exception in thread "Thread-1" org.w3c.dom.DOMException: NAMESPACE_ERR: An attempt is made to create or change an object in a way which is incorrect with regard to namespaces.

when I use:
        ResourceRef derivedFromRef = destXmpMM.createDerivedFrom();

to create the DerivedFrom element as seen in the my method (source below)

    /**
     * Create new XMP Media Management schema from existing XMP Media Management schema data.
     *
     * @param xmpMM XMP Media Management schema extracted from original PDF
     */
    public void loadDestMediaManagmentSchema(XMPSchemaMediaManagement xmpMM) {
        // add XMPSchemaMediaManagment to destination XMP metadata
        XMPSchemaMediaManagement destXmpMM = destXmpMetadata.addMediaManagementSchema();

        // create DerivedFrom ResourceRef element from XMPSchemaMediaManagement object
        ResourceRef derivedFromRef = destXmpMM.createDerivedFrom();
        loadDerivedFromResourceRef(derivedFromRef, xmpMM.getTextProperty("xmpMM:InstanceID")));
        destXmpMM.setDerivedFrom(derivedFromRef);

        // add History ResourceEvents
        destXmpMM.addHistory(loadResourceEvent(destXmpMM, ResourceEvent.ACTION_EDITED, PLMLoader.AGENT_NAME));
        destXmpMM.addHistory(loadResourceEvent(destXmpMM, ResourceEvent.ACTION_MANAGED, PLMLoader.MANAGED_AGENT_NAME));

        destXmpMM.setDocumentID(xmpMM.getDocumentID());

    }

Watching the debugger I believe the error is caused because the new destination XMP Media Management element returns "rdf" as its prefix (from rdf:Description element that wraps the xmpMM content).
<rdf:Description xmlns:xmpMM="http://ns.adobe.com/xap/1.0/mm/">

How can I correct this and generate a DerivedFrom element?

Thanks in advance,

Chris