EDIT

import com.google.common.collect.BiMap;

import com.google.common.collect.HashBiMap;

	private static final BiMap<Rank, String> rankMap = HashBiMap.create();

	static {

	    rankMap.put(Rank.INFRAGENUS(), BfnXmlConstants.RNK_INFRAGEN);

	    rankMap.put(Rank.SUBGENUS(), BfnXmlConstants.RNK_SUBGEN);

	    rankMap.put(Rank.GENUS(), BfnXmlConstants.RNK_GEN);

	    //genus subdivision

	    rankMap.put(Rank.SPECIESAGGREGATE(), BfnXmlConstants.RNK_AGGR);

	    rankMap.put(Rank.INFRAGENERICTAXON(), BfnXmlConstants.RNK_TAXINFRAGEN);

	    rankMap.put(Rank.SUBSERIES(), BfnXmlConstants.RNK_SUBSER);

	    rankMap.put(Rank.SERIES(), BfnXmlConstants.RNK_SER);

	    rankMap.put(Rank.SUBSECTION_BOTANY(), BfnXmlConstants.RNK_SUBSECT);

	    rankMap.put(Rank.SECTION_BOTANY(), BfnXmlConstants.RNK_SECT);

	    //species group

	    rankMap.put(Rank.SUBSPECIFICAGGREGATE(), BfnXmlConstants.RNK_SUBSP_AGGR);

	    rankMap.put(Rank.SUBSPECIES(), BfnXmlConstants.RNK_SSP);

	    rankMap.put(Rank.SUBSPECIES(), BfnXmlConstants.RNK_SUBSP);

	    rankMap.put(Rank.SUBSPECIES(), BfnXmlConstants.RNK_SUBSP_DOT);

	    rankMap.put(Rank.SPECIES(), BfnXmlConstants.RNK_SP);

	    rankMap.put(Rank.SPECIES(), BfnXmlConstants.RNK_SPEZIES);

	    //below subspecies

	    rankMap.put(Rank.CANDIDATE(), BfnXmlConstants.RNK_CAND);

	    rankMap.put(Rank.INFRASPECIFICTAXON(), BfnXmlConstants.RNK_TAXINFRASP);

	    rankMap.put(Rank.SPECIALFORM(), BfnXmlConstants.RNK_FSP);

	    rankMap.put(Rank.SUBSUBFORM(), BfnXmlConstants.RNK_SUBSUBFM);

	    rankMap.put(Rank.SUBFORM(), BfnXmlConstants.RNK_SUBFM);

	    rankMap.put(Rank.FORM(), BfnXmlConstants.RNK_FM);

	    rankMap.put(Rank.SUBSUBVARIETY(), BfnXmlConstants.RNK_SUBSUBVAR);

	    rankMap.put(Rank.SUBVARIETY(), BfnXmlConstants.RNK_SUBVAR);

	    rankMap.put(Rank.VARIETY(), BfnXmlConstants.RNK_VAR);

	    rankMap.put(Rank.VARIETY(), BfnXmlConstants.RNK_VAR_DOT);

	    rankMap.put(Rank.INFRASPECIES(), BfnXmlConstants.RNK_INFRASP);

	    //above superfamily

	    rankMap.put(Rank.INFRAORDER(), BfnXmlConstants.RNK_INFRAORD);

	    rankMap.put(Rank.ORDER(), BfnXmlConstants.RNK_ORD);

	    rankMap.put(Rank.SUPERORDER(), BfnXmlConstants.RNK_SUPERORD);

	    rankMap.put(Rank.INFRACLASS(), BfnXmlConstants.RNK_INFRACL);

	    rankMap.put(Rank.SUBCLASS(), BfnXmlConstants.RNK_SUBCL);

	    rankMap.put(Rank.CLASS(), BfnXmlConstants.RNK_CL);

	    rankMap.put(Rank.SUPERCLASS(), BfnXmlConstants.RNK_SUPERCL);

	    rankMap.put(Rank.INFRAPHYLUM(), BfnXmlConstants.RNK_INFRAPHYL_DIV);

	    rankMap.put(Rank.SUBPHYLUM(), BfnXmlConstants.RNK_SUBPHYL_DIV);

	    rankMap.put(Rank.PHYLUM(), BfnXmlConstants.RNK_PHYL_DIV);

	    rankMap.put(Rank.SUPERPHYLUM(), BfnXmlConstants.RNK_SUPERPHYL_DIV);

	    rankMap.put(Rank.INFRAKINGDOM(), BfnXmlConstants.RNK_INFRAREG);

	    rankMap.put(Rank.SUBKINGDOM(), BfnXmlConstants.RNK_SUBREG);

	    rankMap.put(Rank.KINGDOM(), BfnXmlConstants.RNK_REG);

	    rankMap.put(Rank.SUPERKINGDOM(), BfnXmlConstants.RNK_SUPERREG);

	    rankMap.put(Rank.DOMAIN(), BfnXmlConstants.RNK_DOM);

	    rankMap.put(Rank.SUPRAGENERICTAXON(), BfnXmlConstants.RNK_TAXSUPRAGEN);

	    rankMap.put(Rank.EMPIRE(), BfnXmlConstants.RNK_AUSWERTUNGSGRUPPE);

	    //family group

	    rankMap.put(Rank.FAMILY(), BfnXmlConstants.RNK_INFRAFAM);

	    rankMap.put(Rank.FAMILY(), BfnXmlConstants.RNK_SUBFAM);

	    rankMap.put(Rank.FAMILY(), BfnXmlConstants.RNK_FAM);

	    rankMap.put(Rank.FAMILY(), BfnXmlConstants.RNK_SUPERFAM);

	    //family subdivision

	    rankMap.put(Rank.FAMILY(), BfnXmlConstants.RNK_INTRATRIB);

	    rankMap.put(Rank.FAMILY(), BfnXmlConstants.RNK_SUBTRIB);

	    rankMap.put(Rank.FAMILY(), BfnXmlConstants.RNK_TRIB);

	    rankMap.put(Rank.FAMILY(), BfnXmlConstants.RNK_SUPERTRIB);

	}

    public static BiMap<Rank, String> getRankmap() {

        return rankMap;

    }

import java.util.Set;

import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;

import eu.etaxonomy.cdm.io.redlist.bfnXml.in.BfnXmlTransformer;

import eu.etaxonomy.cdm.model.common.IdentifiableSource;

import eu.etaxonomy.cdm.model.common.OriginalSourceType;

import eu.etaxonomy.cdm.model.name.NonViralName;

import eu.etaxonomy.cdm.model.name.Rank;

        NonViralName name = HibernateProxyHelper.deproxy(taxon.getName(), NonViralName.class);

        Rank rank = name.getRank();

        //wissName

        addNanteil(taxonym, BfnXmlConstants.BEREICH_WISSNAME, taxon.getTitleCache());

        //epitithon 1,2,3

        addNanteil(taxonym, BfnXmlConstants.BEREICH_EPITHETON1, name.getGenusOrUninomial());

        if(rank.isLower(Rank.GENUS())){

            String epitheton2 = name.getInfraGenericEpithet();

            if(epitheton2==null){

                epitheton2 = name.getSpecificEpithet();

            }

            addNanteil(taxonym, BfnXmlConstants.BEREICH_EPITHETON2, epitheton2);

        }

        if(rank.isLower(Rank.SPECIES())){

            String epitheton3 = name.getInfraSpecificEpithet();

            if(epitheton3==null){

                epitheton3 = name.getSpecificEpithet();

            }

            addNanteil(taxonym, BfnXmlConstants.BEREICH_EPITHETON3, epitheton3);

        }

        Set<IdentifiableSource> sources = taxon.getSources();

        for (IdentifiableSource identifiableSource : sources) {

            if(identifiableSource.getType().equals(OriginalSourceType.Import)

                    && identifiableSource.getIdNamespace().equals(BfnXmlConstants.EL_TAXONYM+":"

            +BfnXmlConstants.EL_WISSNAME+":"+BfnXmlConstants.EL_NANTEIL+":"+BfnXmlConstants.BEREICH_EINDEUTIGER_CODE)){

                addNanteil(taxonym, BfnXmlConstants.BEREICH_EINDEUTIGER_CODE, identifiableSource.getIdInSource());

            }

        }

        //rank

        addNanteil(taxonym, BfnXmlConstants.BEREICH_RANG, BfnXmlTransformer.getRankmap().get(rank));

    private void addNanteil(Element element, String bereich, String textContent) {

        element.addContent(nanteil);