Add nodetype retrieval method in org.onehippo.repository.documentworkflow.Request

This Class needs to be augmented with a Type retrieval somehow.

I propose:

public final String getNodeType() {
try

{ return getStringProperty("jcr:primaryType"); }

catch (RepositoryException e) {
}
return null;
}

We'll need this to influence the SCXML workflow engine. To somehow retrieve the type of the Request.

This is a small and trivial change