better use of generics in service layer and persistence list methods
[cdmlib.git] / cdmlib-services / src / main / java / eu / etaxonomy / cdm / api / service / TaxonServiceImpl.java
index e3e72a46e148148056e29030e4e1053000b597a1..d4c1b5942c902cb8701cb0f6bb9366099e605c73 100644 (file)
@@ -21,6 +21,8 @@ import java.util.Map;
 import java.util.Set;\r
 import java.util.UUID;\r
 \r
+import javax.persistence.EntityNotFoundException;\r
+\r
 import org.apache.log4j.Logger;\r
 import org.apache.lucene.index.CorruptIndexException;\r
 import org.apache.lucene.queryParser.ParseException;\r
@@ -35,6 +37,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;\r
 import org.springframework.transaction.annotation.Transactional;\r
 \r
+import eu.etaxonomy.cdm.api.service.config.DeleteConfiguratorBase;\r
 import eu.etaxonomy.cdm.api.service.config.IFindTaxaAndNamesConfigurator;\r
 import eu.etaxonomy.cdm.api.service.config.MatchingTaxonConfigurator;\r
 import eu.etaxonomy.cdm.api.service.config.SynonymDeletionConfigurator;\r
@@ -91,13 +94,16 @@ import eu.etaxonomy.cdm.model.molecular.DnaSample;
 import eu.etaxonomy.cdm.model.molecular.Sequence;\r
 import eu.etaxonomy.cdm.model.molecular.SingleRead;\r
 import eu.etaxonomy.cdm.model.name.HomotypicalGroup;\r
+import eu.etaxonomy.cdm.model.name.NameRelationship;\r
 import eu.etaxonomy.cdm.model.name.Rank;\r
 import eu.etaxonomy.cdm.model.name.TaxonNameBase;\r
 import eu.etaxonomy.cdm.model.name.ZoologicalName;\r
 import eu.etaxonomy.cdm.model.occurrence.DerivedUnit;\r
+import eu.etaxonomy.cdm.model.occurrence.DeterminationEvent;\r
 import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase;\r
 import eu.etaxonomy.cdm.model.reference.Reference;\r
 import eu.etaxonomy.cdm.model.taxon.Classification;\r
+import eu.etaxonomy.cdm.model.taxon.ITaxonTreeNode;\r
 import eu.etaxonomy.cdm.model.taxon.Synonym;\r
 import eu.etaxonomy.cdm.model.taxon.SynonymRelationship;\r
 import eu.etaxonomy.cdm.model.taxon.SynonymRelationshipType;\r
@@ -111,6 +117,7 @@ import eu.etaxonomy.cdm.persistence.dao.common.IOrderedTermVocabularyDao;
 import eu.etaxonomy.cdm.persistence.dao.initializer.AbstractBeanInitializer;\r
 import eu.etaxonomy.cdm.persistence.dao.name.ITaxonNameDao;\r
 import eu.etaxonomy.cdm.persistence.dao.occurrence.IOccurrenceDao;\r
+import eu.etaxonomy.cdm.persistence.dao.taxon.IClassificationDao;\r
 import eu.etaxonomy.cdm.persistence.dao.taxon.ITaxonDao;\r
 import eu.etaxonomy.cdm.persistence.fetch.CdmFetch;\r
 import eu.etaxonomy.cdm.persistence.query.MatchMode;\r
@@ -145,7 +152,6 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
     @Autowired\r
     private ITaxonNodeService nodeService;\r
 \r
-\r
     @Autowired\r
     private ICdmGenericDao genericDao;\r
 \r
@@ -158,6 +164,9 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
     @Autowired\r
     private IOccurrenceDao occurrenceDao;\r
 \r
+    @Autowired\r
+    private IClassificationDao classificationDao;\r
+\r
     @Autowired\r
     private AbstractBeanInitializer beanInitializer;\r
 \r
@@ -180,28 +189,6 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
         return dao.getTaxaByName(name, sec);\r
     }\r
 \r
-    /**\r
-     * FIXME Candidate for harmonization\r
-     * list(Synonym.class, ...)\r
-     *  (non-Javadoc)\r
-     * @see eu.etaxonomy.cdm.api.service.ITaxonService#getAllSynonyms(int, int)\r
-     */\r
-    @Override\r
-    public List<Synonym> getAllSynonyms(int limit, int start) {\r
-        return dao.getAllSynonyms(limit, start);\r
-    }\r
-\r
-    /**\r
-     * FIXME Candidate for harmonization\r
-     * list(Taxon.class, ...)\r
-     *  (non-Javadoc)\r
-     * @see eu.etaxonomy.cdm.api.service.ITaxonService#getAllTaxa(int, int)\r
-     */\r
-    @Override\r
-    public List<Taxon> getAllTaxa(int limit, int start) {\r
-        return dao.getAllTaxa(limit, start);\r
-    }\r
-\r
     /**\r
      * FIXME Candidate for harmonization\r
      * merge with getRootTaxa(Reference sec, ..., ...)\r
@@ -216,18 +203,11 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
         return dao.getRootTaxa(sec, cdmFetch, onlyWithChildren, false);\r
     }\r
 \r
-\r
-    /* (non-Javadoc)\r
-     * @see eu.etaxonomy.cdm.api.service.ITaxonService#getRootTaxa(eu.etaxonomy.cdm.model.name.Rank, eu.etaxonomy.cdm.model.reference.Reference, boolean, boolean)\r
-     */\r
     @Override\r
     public List<Taxon> getRootTaxa(Rank rank, Reference sec, boolean onlyWithChildren,boolean withMisapplications, List<String> propertyPaths) {\r
         return dao.getRootTaxa(rank, sec, null, onlyWithChildren, withMisapplications, propertyPaths);\r
     }\r
 \r
-    /* (non-Javadoc)\r
-     * @see eu.etaxonomy.cdm.api.service.ITaxonService#getAllRelationships(int, int)\r
-     */\r
     @Override\r
     public List<RelationshipBase> getAllRelationships(int limit, int start){\r
         return dao.getAllRelationships(limit, start);\r
@@ -294,10 +274,12 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
 \r
         SynonymRelationshipType relTypeForGroup = SynonymRelationshipType.HOMOTYPIC_SYNONYM_OF();\r
         List<Synonym> heteroSynonyms = acceptedTaxon.getSynonymsInGroup(synonymHomotypicGroup);\r
+        Set<NameRelationship> basionymsAndReplacedSynonyms = synonymHomotypicGroup.getBasionymAndReplacedSynonymRelations();\r
 \r
         for (Synonym heteroSynonym : heteroSynonyms){\r
             if (synonym.equals(heteroSynonym)){\r
                 acceptedTaxon.removeSynonym(heteroSynonym, false);\r
+\r
             }else{\r
                 //move synonyms in same homotypic group to new accepted taxon\r
                 heteroSynonym.replaceAcceptedTaxon(newAcceptedTaxon, relTypeForGroup, copyCitationInfo, citation, microCitation);\r
@@ -310,7 +292,9 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
 //                     deleteSynonym(synonym, taxon, false);\r
             try {\r
                 this.dao.flush();\r
-                this.deleteSynonym(synonym, acceptedTaxon, new SynonymDeletionConfigurator());\r
+                SynonymDeletionConfigurator config = new SynonymDeletionConfigurator();\r
+                config.setDeleteNameIfPossible(false);\r
+                this.deleteSynonym(synonym, acceptedTaxon, config);\r
 \r
             } catch (Exception e) {\r
                 logger.info("Can't delete old synonym from database");\r
@@ -327,9 +311,9 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
         // Get name from synonym\r
         TaxonNameBase<?, ?> synonymName = synonym.getName();\r
 \r
-        // remove synonym from taxon\r
+      /*  // remove synonym from taxon\r
         toTaxon.removeSynonym(synonym);\r
-\r
+*/\r
         // Create a taxon with synonym name\r
         Taxon fromTaxon = Taxon.NewInstance(synonymName, null);\r
 \r
@@ -338,7 +322,8 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
 \r
         // since we are swapping names, we have to detach the name from the synonym completely.\r
         // Otherwise the synonym will still be in the list of typified names.\r
-        synonym.getName().removeTaxonBase(synonym);\r
+       // synonym.getName().removeTaxonBase(synonym);\r
+        this.deleteSynonym(synonym, null);\r
 \r
         return fromTaxon;\r
     }\r
@@ -512,6 +497,50 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
         return new DefaultPagerImpl<TaxonRelationship>(pageNumber, numberOfResults, pageSize, results);\r
     }\r
 \r
+    @Override\r
+    public List<Taxon> listAcceptedTaxaFor(UUID synonymUuid, UUID classificationUuid, Integer pageSize, Integer pageNumber,\r
+            List<OrderHint> orderHints, List<String> propertyPaths){\r
+        return pageAcceptedTaxaFor(synonymUuid, classificationUuid, pageSize, pageNumber, orderHints, propertyPaths).getRecords();\r
+    }\r
+\r
+    @Override\r
+    public Pager<Taxon> pageAcceptedTaxaFor(UUID synonymUuid, UUID classificationUuid, Integer pageSize, Integer pageNumber,\r
+            List<OrderHint> orderHints, List<String> propertyPaths){\r
+\r
+        List<Taxon> list = new ArrayList<Taxon>();\r
+        Long count = 0l;\r
+\r
+        Synonym synonym = null;\r
+\r
+        try {\r
+            synonym = (Synonym) dao.load(synonymUuid);\r
+        } catch (ClassCastException e){\r
+            throw new EntityNotFoundException("The TaxonBase entity referenced by " + synonymUuid + " is not a Synonmy");\r
+        } catch (NullPointerException e){\r
+            throw new EntityNotFoundException("No TaxonBase entity found for " + synonymUuid);\r
+        }\r
+\r
+        Classification classificationFilter = null;\r
+        if(classificationUuid != null){\r
+            try {\r
+            classificationFilter = classificationDao.load(classificationUuid);\r
+            } catch (NullPointerException e){\r
+                throw new EntityNotFoundException("No Classification entity found for " + classificationUuid);\r
+            }\r
+            if(classificationFilter == null){\r
+\r
+            }\r
+        }\r
+\r
+        count = dao.countAcceptedTaxaFor(synonym, classificationFilter) ;\r
+        if(count > (pageSize * pageNumber)){\r
+            list = dao.listAcceptedTaxaFor(synonym, classificationFilter, pageSize, pageNumber, orderHints, propertyPaths);\r
+        }\r
+\r
+        return new DefaultPagerImpl<Taxon>(pageNumber, count.intValue(), pageSize, list);\r
+    }\r
+\r
+\r
     /**\r
      * @param taxon\r
      * @param includeRelationships\r
@@ -548,6 +577,10 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
             taxa.add(taxon);\r
         }\r
 \r
+        if(includeRelationships.isEmpty()){\r
+            return taxa;\r
+        }\r
+\r
         if(maxDepth != null) {\r
             maxDepth--;\r
         }\r
@@ -618,6 +651,27 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
         return new DefaultPagerImpl<SynonymRelationship>(pageNumber, numberOfResults, pageSize, results);\r
     }\r
 \r
+    /* (non-Javadoc)\r
+     * @see eu.etaxonomy.cdm.api.service.ITaxonService#getHomotypicSynonymsByHomotypicGroup(eu.etaxonomy.cdm.model.taxon.Taxon, java.util.List)\r
+     */\r
+    @Override\r
+    public List<List<Synonym>> getSynonymsByHomotypicGroup(Taxon taxon, List<String> propertyPaths){\r
+         List<List<Synonym>> result = new ArrayList<List<Synonym>>();\r
+        Taxon t = (Taxon)dao.load(taxon.getUuid(), propertyPaths);\r
+\r
+        //homotypic\r
+        result.add(t.getHomotypicSynonymsByHomotypicGroup());\r
+\r
+        //heterotypic\r
+        List<HomotypicalGroup> homotypicalGroups = t.getHeterotypicSynonymyGroups();\r
+        for(HomotypicalGroup homotypicalGroup : homotypicalGroups){\r
+            result.add(t.getSynonymsInGroup(homotypicalGroup));\r
+        }\r
+\r
+        return result;\r
+\r
+    }\r
+\r
     /* (non-Javadoc)\r
      * @see eu.etaxonomy.cdm.api.service.ITaxonService#getHomotypicSynonymsByHomotypicGroup(eu.etaxonomy.cdm.model.taxon.Taxon, java.util.List)\r
      */\r
@@ -795,6 +849,8 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
             Boolean limitToGalleries, Boolean includeTaxonDescriptions, Boolean includeOccurrences,\r
             Boolean includeTaxonNameDescriptions, List<String> propertyPath) {\r
 \r
+        logger.trace("listMedia() - START");\r
+\r
         Set<Taxon> taxa = new HashSet<Taxon>();\r
         List<Media> taxonMedia = new ArrayList<Media>();\r
 \r
@@ -803,13 +859,15 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
         }\r
 \r
         // --- resolve related taxa\r
-        if (includeRelationships != null) {\r
+        if (includeRelationships != null && ! includeRelationships.isEmpty()) {\r
+            logger.trace("listMedia() - resolve related taxa");\r
             taxa = listRelatedTaxa(taxon, includeRelationships, null, null, null, null);\r
         }\r
 \r
         taxa.add((Taxon) dao.load(taxon.getUuid()));\r
 \r
         if(includeTaxonDescriptions != null && includeTaxonDescriptions){\r
+            logger.trace("listMedia() - includeTaxonDescriptions");\r
             List<TaxonDescription> taxonDescriptions = new ArrayList<TaxonDescription>();\r
             // --- TaxonDescriptions\r
             for (Taxon t : taxa) {\r
@@ -826,7 +884,9 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
             }\r
         }\r
 \r
+\r
         if(includeOccurrences != null && includeOccurrences) {\r
+            logger.trace("listMedia() - includeOccurrences");\r
             Set<SpecimenOrObservationBase> specimensOrObservations = new HashSet<SpecimenOrObservationBase>();\r
             // --- Specimens\r
             for (Taxon t : taxa) {\r
@@ -880,6 +940,7 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
         }\r
 \r
         if(includeTaxonNameDescriptions != null && includeTaxonNameDescriptions) {\r
+            logger.trace("listMedia() - includeTaxonNameDescriptions");\r
             // --- TaxonNameDescription\r
             Set<TaxonNameDescription> nameDescriptions = new HashSet<TaxonNameDescription>();\r
             for (Taxon t : taxa) {\r
@@ -897,7 +958,12 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
             }\r
         }\r
 \r
+\r
+        logger.trace("listMedia() - initialize");\r
         beanInitializer.initializeAll(taxonMedia, propertyPath);\r
+\r
+        logger.trace("listMedia() - END");\r
+\r
         return taxonMedia;\r
     }\r
 \r
@@ -941,42 +1007,52 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
      * @see eu.etaxonomy.cdm.api.service.ITaxonService#deleteTaxon(eu.etaxonomy.cdm.model.taxon.Taxon, eu.etaxonomy.cdm.api.service.config.TaxonDeletionConfigurator)\r
      */\r
     @Override\r
-    public UUID deleteTaxon(Taxon taxon, TaxonDeletionConfigurator config, Classification classification) throws DataChangeNoRollbackException {\r
+    public String deleteTaxon(Taxon taxon, TaxonDeletionConfigurator config, Classification classification)  {\r
         if (config == null){\r
             config = new TaxonDeletionConfigurator();\r
         }\r
-\r
-            //         SynonymRelationShip\r
+        \r
+        List<String> referencedObjects = isDeletable(taxon, config);\r
+        \r
+        if (referencedObjects.isEmpty()){\r
+            // --- DeleteSynonymRelations\r
             if (config.isDeleteSynonymRelations()){\r
                 boolean removeSynonymNameFromHomotypicalGroup = false;\r
+                // use tmp Set to avoid concurrent modification\r
                 Set<SynonymRelationship> synRelsToDelete = new HashSet<SynonymRelationship>();\r
                 synRelsToDelete.addAll(taxon.getSynonymRelations());\r
                 for (SynonymRelationship synRel : synRelsToDelete){\r
                     Synonym synonym = synRel.getSynonym();\r
+                    // taxon.removeSynonymRelation will set the accepted taxon and the synonym to NULL\r
+                    // this will cause hibernate to delete the relationship since\r
+                    // the SynonymRelationship field on both is annotated with removeOrphan\r
+                    // so no further explicit deleting of the relationship should be done here\r
                     taxon.removeSynonymRelation(synRel, removeSynonymNameFromHomotypicalGroup);\r
+\r
+                    // --- DeleteSynonymsIfPossible\r
                     if (config.isDeleteSynonymsIfPossible()){\r
                         //TODO which value\r
                         boolean newHomotypicGroupIfNeeded = true;\r
                         SynonymDeletionConfigurator synConfig = new SynonymDeletionConfigurator();\r
-\r
                         deleteSynonym(synonym, taxon, synConfig);\r
-                    }else{\r
-                        deleteSynonymRelationships(synonym, taxon);\r
                     }\r
+                    // relationship will be deleted by hibernate automatically,\r
+                    // see comment above and http://dev.e-taxonomy.eu/trac/ticket/3797\r
+                    // else{\r
+                    //     deleteSynonymRelationships(synonym, taxon);\r
+                    // }\r
                 }\r
             }\r
 \r
-            //         TaxonRelationship\r
+            // --- DeleteTaxonRelationships\r
             if (! config.isDeleteTaxonRelationships()){\r
                 if (taxon.getTaxonRelations().size() > 0){\r
-                    String message = "Taxon can't be deleted as it is related to another taxon. Remove taxon from all relations to other taxa prior to deletion.";\r
-                    throw new ReferencedObjectUndeletableException(message);\r
+                    String message = "Taxon can't be deleted as it is related to another taxon. " +\r
+                            "Remove taxon from all relations to other taxa prior to deletion.";\r
+                   // throw new ReferencedObjectUndeletableException(message);\r
                 }\r
             } else{\r
                 for (TaxonRelationship taxRel: taxon.getTaxonRelations()){\r
-\r
-\r
-\r
                     if (config.isDeleteMisappliedNamesAndInvalidDesignations()){\r
                         if (taxRel.getType().equals(TaxonRelationshipType.MISAPPLIED_NAME_FOR()) || taxRel.getType().equals(TaxonRelationshipType.INVALID_DESIGNATION_FOR())){\r
                             if (taxon.equals(taxRel.getToTaxon())){\r
@@ -1002,38 +1078,39 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
                 }\r
             }\r
 \r
-\r
-\r
-\r
             //         TaxonDescription\r
             if (config.isDeleteDescriptions()){\r
-                    Set<TaxonDescription> descriptions = taxon.getDescriptions();\r
-\r
-                    for (TaxonDescription desc: descriptions){\r
-                        //TODO use description delete configurator ?\r
-                        //FIXME check if description is ALWAYS deletable\r
-                        if (desc.getDescribedSpecimenOrObservation() != null){\r
-                            String message = "Taxon can't be deleted as it is used in a TaxonDescription" +\r
-                                    " which also describes specimens or abservations";\r
-                            throw new ReferencedObjectUndeletableException(message);\r
-                        }\r
-                        descriptionService.delete(desc);\r
-                        taxon.removeDescription(desc);\r
+                Set<TaxonDescription> descriptions = taxon.getDescriptions();\r
+                List<TaxonDescription> removeDescriptions = new ArrayList<TaxonDescription>();\r
+                for (TaxonDescription desc: descriptions){\r
+                    //TODO use description delete configurator ?\r
+                    //FIXME check if description is ALWAYS deletable\r
+                    if (desc.getDescribedSpecimenOrObservation() != null){\r
+                        String message = "Taxon can't be deleted as it is used in a TaxonDescription" +\r
+                                " which also describes specimens or abservations";\r
+                        //throw new ReferencedObjectUndeletableException(message);\r
                     }\r
+                    removeDescriptions.add(desc);\r
+                    descriptionService.delete(desc);\r
+\r
+                }\r
+                for (TaxonDescription desc: removeDescriptions){\r
+                    taxon.removeDescription(desc);\r
+                }\r
             }\r
 \r
 \r
-            //check references with only reverse mapping\r
+         /*   //check references with only reverse mapping\r
         String message = checkForReferences(taxon);\r
         if (message != null){\r
-            throw new ReferencedObjectUndeletableException(message.toString());\r
-        }\r
+            //throw new ReferencedObjectUndeletableException(message.toString());\r
+        }*/\r
 \r
          if (! config.isDeleteTaxonNodes() || (!config.isDeleteInAllClassifications() && classification == null )){\r
-                if (taxon.getTaxonNodes().size() > 0){\r
-                    message = "Taxon can't be deleted as it is used in a classification node. Remove taxon from all classifications prior to deletion or define a classification where it should be deleted or adapt the taxon deletion configurator.";\r
-                    throw new ReferencedObjectUndeletableException(message);\r
-                }\r
+                //if (taxon.getTaxonNodes().size() > 0){\r
+                   // message = "Taxon can't be deleted as it is used in a classification node. Remove taxon from all classifications prior to deletion or define a classification where it should be deleted or adapt the taxon deletion configurator.";\r
+                   // throw new ReferencedObjectUndeletableException(message);\r
+                //}\r
             }else{\r
                 if (taxon.getTaxonNodes().size() != 0){\r
                     Set<TaxonNode> nodes = taxon.getTaxonNodes();\r
@@ -1058,16 +1135,18 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
                             success =taxon.removeTaxonNode(node, deleteChildren);\r
                             nodeService.delete(node);\r
                         } else {\r
-                            message = "Taxon is not used in defined classification";\r
-                            throw new DataChangeNoRollbackException(message);\r
+                           // message = "Taxon is not used in defined classification";\r
+                           // throw new DataChangeNoRollbackException(message);\r
                         }\r
                     } else if (config.isDeleteInAllClassifications()){\r
-                        List<TaxonNode> nodesList = new ArrayList<TaxonNode>();\r
+                        Set<ITaxonTreeNode> nodesList = new HashSet<ITaxonTreeNode>();\r
                         nodesList.addAll(taxon.getTaxonNodes());\r
 \r
-                            for (TaxonNode taxonNode: nodesList){\r
-                                if(deleteChildren){\r
-                                    Object[] childNodes = taxonNode.getChildNodes().toArray();\r
+                            for (ITaxonTreeNode treeNode: nodesList){\r
+                                TaxonNode taxonNode = (TaxonNode) treeNode;\r
+                                if(!deleteChildren){\r
+                                   /* Object[] childNodes = taxonNode.getChildNodes().toArray();\r
+                                    //nodesList.addAll(taxonNode.getChildNodes());\r
                                     for (Object childNode: childNodes){\r
                                         TaxonNode childNodeCast = (TaxonNode) childNode;\r
                                         deleteTaxon(childNodeCast.getTaxon(), config, classification);\r
@@ -1077,9 +1156,11 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
                                     /*for (TaxonNode childNode: taxonNode.getChildNodes()){\r
                                         deleteTaxon(childNode.getTaxon(), config, classification);\r
 \r
-                                    }*/\r
-                                    //taxon.removeTaxonNode(taxonNode);\r
+                                    }\r
+                                   // taxon.removeTaxonNode(taxonNode);\r
+                                    //nodeService.delete(taxonNode);\r
                                 } else{\r
+                                    */\r
                                     Object[] childNodes = taxonNode.getChildNodes().toArray();\r
                                     for (Object childNode: childNodes){\r
                                         TaxonNode childNodeCast = (TaxonNode) childNode;\r
@@ -1089,36 +1170,35 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
                                     //taxon.removeTaxonNode(taxonNode);\r
                                 }\r
                             }\r
-\r
-\r
-\r
-                        nodeService.deleteTaxonNodes(nodesList);\r
-\r
+                        config.getTaxonNodeConfig().setDeleteTaxon(false);\r
+                        nodeService.deleteTaxonNodes(nodesList, config);\r
                     }\r
                     if (!success){\r
-                         message = "The taxon node could not be deleted.";\r
-                        throw new DataChangeNoRollbackException(message);\r
+                        // message = "The taxon node could not be deleted.";\r
+                        //throw new DataChangeNoRollbackException(message);\r
                     }\r
                 }\r
             }\r
+\r
+\r
+             //PolytomousKey TODO\r
+\r
+             boolean usedInPolytomousKey = checkForPolytomousKeys(taxon);\r
             //TaxonNameBase\r
             if (config.isDeleteNameIfPossible()){\r
-                try {\r
+                \r
 \r
                     //TaxonNameBase name = nameService.find(taxon.getName().getUuid());\r
                     TaxonNameBase name = (TaxonNameBase)HibernateProxyHelper.deproxy(taxon.getName());\r
                     //check whether taxon will be deleted or not\r
-                    if (taxon.getTaxonNodes() == null || taxon.getTaxonNodes().size()== 0){\r
+                    if ((taxon.getTaxonNodes() == null || taxon.getTaxonNodes().size()== 0) && name != null ){\r
                         taxon = (Taxon) HibernateProxyHelper.deproxy(taxon);\r
                         name.removeTaxonBase(taxon);\r
                         nameService.save(name);\r
-                        nameService.delete(name, config.getNameDeletionConfig());\r
+                        String uuidString = nameService.delete(name, config.getNameDeletionConfig());\r
+                        logger.debug(uuidString);\r
                     }\r
-                } catch (ReferencedObjectUndeletableException e) {\r
-                    //do nothing\r
-                    if (logger.isDebugEnabled()){logger.debug("Name could not be deleted");}\r
-\r
-                }\r
+                \r
             }\r
 \r
 //             TaxonDescription\r
@@ -1138,19 +1218,16 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
     }\r
                     }\r
                 }*/\r
-\r
-\r
-\r
-            if (taxon.getTaxonNodes() == null || taxon.getTaxonNodes().size()== 0){\r
-                dao.delete(taxon);\r
-                return taxon.getUuid();\r
-            } else{\r
-                message = "Taxon can't be deleted as it is used in another Taxonnode";\r
-                if (!config.isDeleteInAllClassifications() && classification != null) {\r
-                    message += "The Taxonnode in " + classification.getTitleCache() + " was deleted.";\r
-                }\r
-                throw new ReferencedObjectUndeletableException(message);\r
+        \r
+            if ((taxon.getTaxonNodes() == null || taxon.getTaxonNodes().size()== 0)  ){\r
+                UUID uuid = dao.delete(taxon);\r
+                return uuid.toString();\r
+            } else {\r
+               return "The Taxon can't be deleted.";\r
             }\r
+        }else {\r
+                return referencedObjects.toString();\r
+        }\r
 \r
 \r
     }\r
@@ -1166,22 +1243,39 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
             }\r
 \r
 \r
-            //PolytomousKeyNode\r
+           /* //PolytomousKeyNode\r
             if (referencingObject.isInstanceOf(PolytomousKeyNode.class)){\r
                 String message = "Taxon" + taxon.getTitleCache() + " can't be deleted as it is used in polytomous key node";\r
                 return message;\r
-            }\r
+            }*/\r
 \r
             //TaxonInteraction\r
             if (referencingObject.isInstanceOf(TaxonInteraction.class)){\r
                 String message = "Taxon can't be deleted as it is used in taxonInteraction#taxon2";\r
                 return message;\r
             }\r
+\r
+          //TaxonInteraction\r
+            if (referencingObject.isInstanceOf(DeterminationEvent.class)){\r
+                String message = "Taxon can't be deleted as it is used in a determination event";\r
+                return message;\r
+            }\r
+\r
         }\r
+\r
         referencingObjects = null;\r
         return null;\r
     }\r
 \r
+    private boolean checkForPolytomousKeys(Taxon taxon){\r
+        boolean result = false;\r
+        List<CdmBase> list = genericDao.getCdmBasesByFieldAndClass(PolytomousKeyNode.class, "taxon", taxon);\r
+        if (!list.isEmpty()) {\r
+            result = true;\r
+        }\r
+        return result;\r
+    }\r
+\r
     @Transactional(readOnly = false)\r
     public UUID delete(Synonym syn){\r
         UUID result = syn.getUuid();\r
@@ -1194,8 +1288,8 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
      */\r
     @Transactional(readOnly = false)\r
     @Override\r
-    public void deleteSynonym(Synonym synonym, SynonymDeletionConfigurator config) {\r
-        deleteSynonym(synonym, null, config);\r
+    public String deleteSynonym(Synonym synonym, SynonymDeletionConfigurator config) {\r
+        return deleteSynonym(synonym, null, config);\r
 \r
     }\r
 \r
@@ -1205,50 +1299,57 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
      */\r
     @Transactional(readOnly = false)\r
     @Override\r
-    public void deleteSynonym(Synonym synonym, Taxon taxon, SynonymDeletionConfigurator config) {\r
+    public String deleteSynonym(Synonym synonym, Taxon taxon, SynonymDeletionConfigurator config) {\r
         if (synonym == null){\r
-            return;\r
+            return null;\r
         }\r
+        \r
         if (config == null){\r
             config = new SynonymDeletionConfigurator();\r
         }\r
-        synonym = CdmBase.deproxy(dao.merge(synonym), Synonym.class);\r
-\r
-        //remove synonymRelationship\r
-        Set<Taxon> taxonSet = new HashSet<Taxon>();\r
-        if (taxon != null){\r
-            taxonSet.add(taxon);\r
+        List<String> messages = isDeletable(synonym, config);\r
+        if (messages.isEmpty()){\r
+               synonym = CdmBase.deproxy(dao.merge(synonym), Synonym.class);\r
+       \r
+               //remove synonymRelationship\r
+               Set<Taxon> taxonSet = new HashSet<Taxon>();\r
+               if (taxon != null){\r
+                   taxonSet.add(taxon);\r
+               }else{\r
+                   taxonSet.addAll(synonym.getAcceptedTaxa());\r
+               }\r
+               for (Taxon relatedTaxon : taxonSet){\r
+       //                      dao.deleteSynonymRelationships(synonym, relatedTaxon);\r
+                   relatedTaxon.removeSynonym(synonym, config.isNewHomotypicGroupIfNeeded());\r
+               }\r
+               this.saveOrUpdate(synonym);\r
+       \r
+               //TODO remove name from homotypical group?\r
+       \r
+               //remove synonym (if necessary)\r
+       \r
+               UUID uuid = null;\r
+               if (synonym.getSynonymRelations().isEmpty()){\r
+                   TaxonNameBase<?,?> name = synonym.getName();\r
+                   synonym.setName(null);\r
+                   uuid = dao.delete(synonym);\r
+       \r
+                   //remove name if possible (and required)\r
+                   if (name != null && config.isDeleteNameIfPossible()){\r
+                       \r
+                           nameService.delete(name, config.getNameDeletionConfig());\r
+                       \r
+                   }\r
+                   \r
+               }else {\r
+                       return null;\r
+               }\r
+               return uuid.toString();\r
         }else{\r
-            taxonSet.addAll(synonym.getAcceptedTaxa());\r
-        }\r
-        for (Taxon relatedTaxon : taxonSet){\r
-//                     dao.deleteSynonymRelationships(synonym, relatedTaxon);\r
-            relatedTaxon.removeSynonym(synonym, config.isNewHomotypicGroupIfNeeded());\r
-        }\r
-        this.saveOrUpdate(synonym);\r
-\r
-        //TODO remove name from homotypical group?\r
-\r
-        //remove synonym (if necessary)\r
-\r
-\r
-        if (synonym.getSynonymRelations().isEmpty()){\r
-            TaxonNameBase<?,?> name = synonym.getName();\r
-            synonym.setName(null);\r
-            dao.delete(synonym);\r
-\r
-            //remove name if possible (and required)\r
-            if (name != null && config.isDeleteNameIfPossible()){\r
-                try{\r
-                    nameService.delete(name, config.getNameDeletionConfig());\r
-                }catch (ReferencedObjectUndeletableException ex){\r
-                    System.err.println("Name wasn't deleted as it is referenced");\r
-                    if (logger.isDebugEnabled()) {\r
-                        logger.debug("Name wasn't deleted as it is referenced");\r
-                    }\r
-                }\r
-            }\r
+               return messages.toString();\r
         }\r
+        \r
+     \r
     }\r
 \r
 \r
@@ -1547,7 +1648,7 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
             boolean highlightFragments, Integer pageSize, Integer pageNumber, List<OrderHint> orderHints, List<String> propertyPaths) throws CorruptIndexException, IOException, ParseException {\r
 \r
 \r
-        LuceneSearch luceneSearch = prepareFindByFullTextSearch(clazz, queryString, classification, languages, highlightFragments);\r
+        LuceneSearch luceneSearch = prepareFindByFullTextSearch(clazz, queryString, classification, languages, highlightFragments, null);\r
 \r
         // --- execute search\r
         TopGroupsWithMaxScore topDocsResultSet = luceneSearch.executeSearch(pageSize, pageNumber);\r
@@ -1593,18 +1694,21 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
      * @param classification\r
      * @param languages\r
      * @param highlightFragments\r
+     * @param sortFields TODO\r
      * @param directorySelectClass\r
      * @return\r
      */\r
     protected LuceneSearch prepareFindByFullTextSearch(Class<? extends CdmBase> clazz, String queryString, Classification classification, List<Language> languages,\r
-            boolean highlightFragments) {\r
+            boolean highlightFragments, SortField[] sortFields) {\r
         BooleanQuery finalQuery = new BooleanQuery();\r
         BooleanQuery textQuery = new BooleanQuery();\r
 \r
         LuceneSearch luceneSearch = new LuceneSearch(luceneIndexToolProvider, GroupByTaxonClassBridge.GROUPBY_TAXON_FIELD, TaxonBase.class);\r
         QueryFactory taxonBaseQueryFactory = luceneIndexToolProvider.newQueryFactoryFor(TaxonBase.class);\r
 \r
-        SortField[] sortFields = new  SortField[]{SortField.FIELD_SCORE, new SortField("titleCache__sort", SortField.STRING,  false)};\r
+        if(sortFields == null){\r
+            sortFields = new  SortField[]{SortField.FIELD_SCORE, new SortField("titleCache__sort", SortField.STRING,  false)};\r
+        }\r
         luceneSearch.setSortFields(sortFields);\r
 \r
         // ---- search criteria\r
@@ -1637,16 +1741,17 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
      * <li>direct, everted: {@link Direction.relatedTo}: TaxonRelationShip.relatedTo.id --&gt; Taxon.id </li>\r
      * <li>inverse: {@link Direction.relatedFrom}:  TaxonRelationShip.relatedFrom.id --&gt; Taxon.id </li>\r
      * <ul>\r
-     *\r
      * @param queryString\r
      * @param classification\r
      * @param languages\r
      * @param highlightFragments\r
+     * @param sortFields TODO\r
+     *\r
      * @return\r
      * @throws IOException\r
      */\r
     protected LuceneSearch prepareFindByTaxonRelationFullTextSearch(TaxonRelationshipEdge edge, String queryString, Classification classification, List<Language> languages,\r
-            boolean highlightFragments) throws IOException {\r
+            boolean highlightFragments, SortField[] sortFields) throws IOException {\r
 \r
         String fromField;\r
         String queryTermField;\r
@@ -1675,7 +1780,9 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
         joinFromQuery.add(taxonBaseQueryFactory.newEntityIdQuery("type.id", edge.getTaxonRelationshipType()), Occur.MUST);\r
         Query joinQuery = taxonBaseQueryFactory.newJoinQuery(fromField, toField, joinFromQuery, TaxonRelationship.class);\r
 \r
-        SortField[] sortFields = new  SortField[]{SortField.FIELD_SCORE, new SortField("titleCache__sort", SortField.STRING,  false)};\r
+        if(sortFields == null){\r
+            sortFields = new  SortField[]{SortField.FIELD_SCORE, new SortField("titleCache__sort", SortField.STRING,  false)};\r
+        }\r
         luceneSearch.setSortFields(sortFields);\r
 \r
         finalQuery.add(joinQuery, Occur.MUST);\r
@@ -1731,6 +1838,20 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
             searchModes = EnumSet.of(TaxaAndNamesSearchMode.doTaxa);\r
         }\r
 \r
+        // set sort order and thus override any sort orders which may have been\r
+        // defindes by prepare*Search methods\r
+        if(orderHints == null){\r
+            orderHints = OrderHint.NOMENCLATURAL_SORT_ORDER;\r
+        }\r
+        SortField[] sortFields = new SortField[orderHints.size()];\r
+        int i = 0;\r
+        for(OrderHint oh : orderHints){\r
+            sortFields[i++] = oh.toSortField();\r
+        }\r
+//        SortField[] sortFields = new SortField[]{SortField.FIELD_SCORE, new SortField("id", SortField.STRING, false)};\r
+//        SortField[] sortFields = new SortField[]{new SortField(NomenclaturalSortOrderBrigde.NAME_SORT_FIELD_NAME, SortField.STRING, false)};\r
+\r
+\r
         boolean addDistributionFilter = namedAreas != null && namedAreas.size() > 0;\r
 \r
         List<LuceneSearch> luceneSearches = new ArrayList<LuceneSearch>();\r
@@ -1788,7 +1909,7 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
             } else if (!searchModes.contains(TaxaAndNamesSearchMode.doTaxa) && searchModes.contains(TaxaAndNamesSearchMode.doSynonyms)) {\r
                 taxonBaseSubclass = Synonym.class;\r
             }\r
-            luceneSearches.add(prepareFindByFullTextSearch(taxonBaseSubclass, queryString, classification, languages, highlightFragments));\r
+            luceneSearches.add(prepareFindByFullTextSearch(taxonBaseSubclass, queryString, classification, languages, highlightFragments, sortFields));\r
             idFieldMap.put(CdmBaseType.TAXON, "id");\r
             /* A) does not work!!!!\r
             if(addDistributionFilter){\r
@@ -1832,6 +1953,7 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
             LuceneSearch byCommonNameSearch = new LuceneSearch(luceneIndexToolProvider, GroupByTaxonClassBridge.GROUPBY_TAXON_FIELD, Taxon.class);\r
             byCommonNameSearch.setCdmTypRestriction(Taxon.class);\r
             byCommonNameSearch.setQuery(byCommonNameJoinQuery);\r
+            byCommonNameSearch.setSortFields(sortFields);\r
             idFieldMap.put(CdmBaseType.TAXON, "id");\r
 \r
             luceneSearches.add(byCommonNameSearch);\r
@@ -1864,7 +1986,7 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
             //\r
             luceneSearches.add(prepareFindByTaxonRelationFullTextSearch(\r
                     new TaxonRelationshipEdge(TaxonRelationshipType.MISAPPLIED_NAME_FOR(), Direction.relatedTo),\r
-                    queryString, classification, languages, highlightFragments));\r
+                    queryString, classification, languages, highlightFragments, sortFields));\r
             idFieldMap.put(CdmBaseType.TAXON, "id");\r
 \r
             if(addDistributionFilter){\r
@@ -1932,6 +2054,8 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
         if (addDistributionFilter){\r
             multiSearch.setFilter(multiIndexByAreaFilter);\r
         }\r
+\r
+\r
         // --- execute search\r
         TopGroupsWithMaxScore topDocsResultSet = multiSearch.executeSearch(pageSize, pageNumber);\r
 \r
@@ -2067,7 +2191,7 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
             Integer pageSize, Integer pageNumber, List<OrderHint> orderHints, List<String> propertyPaths) throws CorruptIndexException, IOException, ParseException, LuceneMultiSearchException {\r
 \r
         LuceneSearch luceneSearchByDescriptionElement = prepareByDescriptionElementFullTextSearch(null, queryString, classification, null, languages, highlightFragments);\r
-        LuceneSearch luceneSearchByTaxonBase = prepareFindByFullTextSearch(null, queryString, classification, languages, highlightFragments);\r
+        LuceneSearch luceneSearchByTaxonBase = prepareFindByFullTextSearch(null, queryString, classification, languages, highlightFragments, null);\r
 \r
         LuceneMultiSearch multiSearch = new LuceneMultiSearch(luceneIndexToolProvider, luceneSearchByDescriptionElement, luceneSearchByTaxonBase);\r
 \r
@@ -2237,7 +2361,7 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
         }\r
         String genusOfTaxon = taxonName.getGenusOrUninomial();\r
         Set<TaxonNode> nodes = taxon.getTaxonNodes();\r
-         List<String> taxonNames = new ArrayList<String>();\r
+        List<String> taxonNames = new ArrayList<String>();\r
 \r
         for (TaxonNode node: nodes){\r
            // HashMap<String, String> synonymsGenus = new HashMap<String, String>(); // Changed this to be able to store the idInSource to a genusName\r
@@ -2878,9 +3002,126 @@ public class TaxonServiceImpl extends IdentifiableServiceBase<TaxonBase,ITaxonDa
         return list;\r
     }\r
 \r
+    @Override\r
+    public Synonym changeRelatedTaxonToSynonym(Taxon fromTaxon, Taxon toTaxon, TaxonRelationshipType oldRelationshipType,\r
+            SynonymRelationshipType synonymRelationshipType) throws DataChangeNoRollbackException {\r
+        // Create new synonym using concept name\r
+                TaxonNameBase<?, ?> synonymName = fromTaxon.getName();\r
+                Synonym synonym = Synonym.NewInstance(synonymName, fromTaxon.getSec());\r
+\r
+                // Remove concept relation from taxon\r
+                toTaxon.removeTaxon(fromTaxon, oldRelationshipType);\r
 \r
 \r
 \r
 \r
+                // Create a new synonym for the taxon\r
+                SynonymRelationship synonymRelationship;\r
+                if (synonymRelationshipType != null\r
+                        && synonymRelationshipType.equals(SynonymRelationshipType.HOMOTYPIC_SYNONYM_OF())){\r
+                    synonymRelationship = toTaxon.addHomotypicSynonym(synonym, null, null);\r
+                } else{\r
+                    synonymRelationship = toTaxon.addHeterotypicSynonymName(synonymName);\r
+                }\r
+\r
+                this.saveOrUpdate(toTaxon);\r
+                //TODO: configurator and classification\r
+                this.deleteTaxon(fromTaxon, null, null);\r
+                return synonymRelationship.getSynonym();\r
 \r
-}\r
+    }\r
+    @Override\r
+    public List<String> isDeletable(TaxonBase taxonBase, DeleteConfiguratorBase config){\r
+       List<String> result = new ArrayList<String>();\r
+       Set<CdmBase> references = commonService.getReferencingObjects(taxonBase);\r
+       if (taxonBase instanceof Taxon){\r
+               TaxonDeletionConfigurator taxonConfig = (TaxonDeletionConfigurator) config;\r
+               result = isDeletableForTaxon(references, taxonConfig);\r
+       }else{\r
+               SynonymDeletionConfigurator synonymConfig = (SynonymDeletionConfigurator) config;\r
+               result = isDeletableForSynonym(references, synonymConfig);\r
+       }\r
+       return result;\r
+    }\r
+    \r
+    private List<String> isDeletableForSynonym(Set<CdmBase> references, SynonymDeletionConfigurator config){\r
+       String message;\r
+       List<String> result = new ArrayList<String>();\r
+       for (CdmBase ref: references){\r
+               if (!(ref instanceof SynonymRelationship || ref instanceof Taxon || ref instanceof TaxonNameBase)){\r
+                       message = "The Synonym can't be deleted as long as it is referenced by " + ref.getClass().getSimpleName() + " with id "+ ref.getId();\r
+                       result.add(message);\r
+               }\r
+       }\r
+       \r
+       return result;\r
+    }\r
+    private List<String> isDeletableForTaxon(Set<CdmBase> references, TaxonDeletionConfigurator config){\r
+       String message;\r
+       List<String> result = new ArrayList<String>();\r
+       for (CdmBase ref: references){\r
+               if (!(ref instanceof TaxonNameBase)){\r
+                       if (!config.isDeleteSynonymRelations() && (ref instanceof SynonymRelationship)){\r
+                               message = "The Taxon can't be deleted as long as it has synonyms.";\r
+                               result.add(message);\r
+                       }\r
+                       if (!config.isDeleteDescriptions() && (ref instanceof DescriptionBase)){\r
+                               message = "The Taxon can't be deleted as long as it has factual data.";\r
+                               result.add(message);\r
+                       }\r
+                       \r
+                       if (!config.isDeleteTaxonNodes() && (ref instanceof TaxonNode)){\r
+                               message = "The Taxon can't be deleted as long as it belongs to a taxon node.";\r
+                               result.add(message);\r
+                       }\r
+                       if (!config.isDeleteTaxonRelationships() && (ref instanceof TaxonNode)){\r
+                               if (!config.isDeleteMisappliedNamesAndInvalidDesignations() && (((TaxonRelationship)ref).getType().equals(TaxonRelationshipType.MISAPPLIED_NAME_FOR())|| ((TaxonRelationship)ref).getType().equals(TaxonRelationshipType.INVALID_DESIGNATION_FOR()))){\r
+                                       message = "The Taxon can't be deleted as long as it has misapplied names or invalid designations.";\r
+                                       result.add(message);\r
+                               } else{\r
+                                       message = "The Taxon can't be deleted as long as it belongs to a taxon node.";\r
+                                       result.add(message);\r
+                               }\r
+                       }\r
+                       if (ref instanceof PolytomousKeyNode){\r
+                               message = "The Taxon can't be deleted as long as it is referenced by a polytomous key node.";\r
+                               result.add(message);\r
+                       }\r
+                       \r
+                       if (HibernateProxyHelper.isInstanceOf(ref, IIdentificationKey.class)){\r
+                   message = "Taxon can't be deleted as it is used in an identification key. Remove from identification key prior to deleting this name";\r
+                   result.add(message);\r
+                   \r
+                }\r
+\r
+\r
+               /* //PolytomousKeyNode\r
+                if (referencingObject.isInstanceOf(PolytomousKeyNode.class)){\r
+                    String message = "Taxon" + taxon.getTitleCache() + " can't be deleted as it is used in polytomous key node";\r
+                    return message;\r
+                }*/\r
+\r
+                //TaxonInteraction\r
+                if (ref.isInstanceOf(TaxonInteraction.class)){\r
+                    message = "Taxon can't be deleted as it is used in taxonInteraction#taxon2";\r
+                    result.add(message);\r
+                }\r
+\r
+              //TaxonInteraction\r
+                if (ref.isInstanceOf(DeterminationEvent.class)){\r
+                    message = "Taxon can't be deleted as it is used in a determination event";\r
+                    result.add(message);\r
+                }\r
+\r
+            }\r
+\r
+       }\r
+       \r
+       return result;\r
+    }\r
+\r
+\r
+\r
+\r
+\r
+    }\r