[VuFind-Tech] Problems using Marc4J DataField methods

[Ronan M. <rm...@nl...>]

Hi All,

I've been working on a custom beanshell script and am having some
problems with the Marc4J end of it. For whatever reason, the datafield
methods I'm calling are throwing errors of "Method not found".

Here is the relevant code extract:

while (authorField.hasSubfield('e')){
 
authorRoles.add(authorField.getSubfield('e').getData());
}


Caused by: Error in method invocation: Method hasSubfield( char ) not
found in class'org.marc4j.marc.impl.DataFieldImpl' : at Line: 48 : in
file: inline evaluation of: ``import org.marc4j.marc.Record; import
org.marc4j.marc.DataField; import org.solr . . . '' :
authorField.hasSubfield ( 'e' )

So it is recognising authorField as a DataField, but does not think
hasSubfield() is a valid  method. However, according to the docs:
http://marc4j.tigris.org/doc/apidoc/org/marc4j/marc/DataField.html#hasSu
bfield%28char%29

hasSubfield

public boolean hasSubfield(char code)

    Returns true if there is a subfield with the given identifier.

    Parameters:
        code - the data element identifier 
    Returns:
        true if the data element exists, false if not

So something funny is going on. My best guess is that hasSubfield
belongs to a later version of Marc4J than we're using here in Vufind,
but I'm not sure if that's true or not.

Does anyone have a suggestion?

Cheers,

Ronan McHugh
National Library of Ireland
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