/*
 * Why doesn't the EventEntity.getCrossReference() function return a list of cross refences?
 * The example enters ID '70668' which is 'proline dehydrogenase [mitochondrial inner membrane]'
 * and contains the following xrefs on the Reactome website:
 * BioGPS Gene:5625
 * Brenda:1.5.99.8
 * CTD Gene:5625
 * EC:1.5.99.8
 * ENSEMBL:ENSG00000100033
 * Entrez Gene:5625
 * HapMap:NM_016335
 * IntEnz:1.5.99.8
 * KEGG:5625
 * OMIM:181500
 * OMIM:239500
 * OMIM:600850
 * OMIM:606810
 * RefSeq:NM_016335
 * RefSeq:NP_057419
 * UCSC human:O43272
 * UniProt:O43272
 * dbSNP Gene:5625
 *
 * Am I using the wrong function? It seems as well, for metabolites, to only return the KEGG Compound identifier. But the Reactome website is
 * showing more cross reference IDs.
 */


/* EXAMPLE CODE */
List<CatalystActivity> reactomeCatalysts = reactomeReaction.getCatalystActivity();

    for(CatalystActivity catalystActivity : reactomeCatalysts) {
        if(catalystActivity.getPhysicalEntity() != null) {
        //Append known data to the catalyst proxy
        EventEntity physicalEntity = (EventEntity) queryByObject.invoke(new Object[]{catalystActivity.getPhysicalEntity()});

        System.out.println("Entering: " + physicalEntity.getName());
        System.out.println("ID: " + physicalEntity.getId());

        List<DatabaseCrossReference> xrefs = physicalEntity.getCrossReference();

        if(xrefs == null)
            System.out.println("Cannot find xrefs!");
        else
            System.out.println("Number of xrefs: " + xrefs.size());
        }
    }


/* GENERATED OUTPUT */
Entering: proline dehydrogenase [mitochondrial inner membrane]
ID: 70668
Cannot find xrefs!