Hi,
At first, thank you for your help. I've tried the snapshot, which corrects the
NullPointerException problem perfectly.
However, after further testing (of the special case I described earlier), it
seems to me that the behavior of the XMPMetadata.getSchema(String, String)
method doesn't match its documentation.
I finally found a workaround, but here's the explanation :
If you remember, my PDF file contained in its metadata two XMP schemas with the
same properties and the same namespace URI but different prefixes ("fx" and
"zf").
I wanted to use the XMPMetadata.getSchema(String, String) method to retrieve an
XMPSchema object representing the schema with the prefix "fx".
This seems to fit the case perfectly, as the method documentation states :
"This method is here to treat metadata which embed more than one time the same
schema. It permit to retrieve a specific schema with its prefix".
But the method always returns null when I call it with the "fx" prefix.
However, when I call it without prefix or with the prefix "zf", I get an
XMPSchema object with the prefix « zf » and containing all the properties for
the two schemas.
It seems to me that xmpbox considers two schemas with same namespace URI to be
the only one same schema, even if the prefixes are differents.
In my case, I finally created a method to filter the prefix at property level :
public static String getQualifiedTextPropertyValue(XMPSchema schema, String
prefix, String name)
{
Iterator<AbstractField> it =
schema.getContainer().getAllProperties().iterator();
AbstractField tmp;
while (it.hasNext())
{
tmp = it.next();
if (tmp.getPropertyName().equals(name) &&
tmp.getPrefix().equals(prefix) && tmp instanceof
TextType)
{
return ((TextType)tmp).getStringValue();
}
}
return null;
}
I don’t know enough about the XML standard to know how namespaces should be
interpreted, but I’d rather submit this problem to you.
All my explanations refer to the case and PDF file that were in my first
e-mail, which I can forward if necessary.
Thanks again for the fix,
Best regards,
Sylvère
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