cdmlib-services/src/main/java/eu/etaxonomy/cdm/api/service/taxonGraph/TaxonGraphObserver.java

   1 /**
   2 * Copyright (C) 2018 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9 package eu.etaxonomy.cdm.api.service.taxonGraph;
  10
  11 import org.apache.commons.lang.ArrayUtils;
  12 import org.apache.log4j.Logger;
  13 import org.springframework.beans.factory.annotation.Autowired;
  14 import org.springframework.stereotype.Component;
  15
  16 import eu.etaxonomy.cdm.model.name.TaxonName;
  17 import eu.etaxonomy.cdm.model.reference.Reference;
  18 import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeEvent;
  19 import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeEvent.EventType;
  20 import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeMap;
  21 import eu.etaxonomy.cdm.persistence.hibernate.ICdmPostDataChangeObserver;
  22
  23 /**
  24  * @author a.kohlbecker
  25  * @since Sep 27, 2018
  26  *
  27  */
  28 @Component
  29 public class TaxonGraphObserver implements ICdmPostDataChangeObserver {
  30
  31     @Autowired
  32     private ITaxonGraphService taxonGraphService;
  33
  34     private String[] NAMEPARTS_OR_RANK_PROPS = new String[]{"genusOrUninomial", "specificEpithet", "rank"};
  35     private String[] NOMREF_PROP = new String[]{"nomenclaturalReference"};
  36
  37     /**
  38      * {@inheritDoc}
  39      */
  40     @Override
  41     public void update(CdmDataChangeMap changeEvents) {
  42
  43         try {
  44             for(CdmDataChangeEvent event : changeEvents.getEvents(EventType.UPDATE)){
  45                 if(event.getEntity() instanceof TaxonName){
  46                     if(checkStateChange(event, NAMEPARTS_OR_RANK_PROPS) > -1){
  47                         taxonGraphService.onNameOrRankChange((TaxonName) event.getEntity());
  48                     }
  49                     int changedNomRefIndex = checkStateChange(event, NOMREF_PROP);
  50                     if(changedNomRefIndex > -1){
  51                         taxonGraphService.onNomReferenceChange((TaxonName) event.getEntity(), (Reference)event.getOldState()[changedNomRefIndex]);
  52                     }
  53                 }
  54             }
  55             for(CdmDataChangeEvent event : changeEvents.getEvents(EventType.INSERT)){
  56                 if(event.getEntity() instanceof TaxonName){
  57                     taxonGraphService.onNewTaxonName((TaxonName) event.getEntity());
  58                 }
  59             }
  60         } catch (TaxonGraphException e) {
  61             Logger.getLogger(this.getClass()).error(e);
  62         }
  63
  64     }
  65
  66
  67     private int checkStateChange(CdmDataChangeEvent event, String[] propertyNamesToCheck){
  68
  69         String[] propertyNames = event.getPersister().getPropertyNames();
  70         Object[] oldState = event.getOldState();
  71         Object[] state = event.getState();
  72
  73         int propsCheckedCnt = 0;
  74         for(int i = 0; i < propertyNames.length; i++){
  75             if(ArrayUtils.contains(propertyNamesToCheck, propertyNames[i])){
  76                 propsCheckedCnt++;
  77                 if(!oldState[i].equals(state[i])){
  78                     return i;
  79                 }
  80                 if(propsCheckedCnt == propertyNamesToCheck.length){
  81                     return -1;
  82                 }
  83             }
  84         }
  85         // this execption should be raised during the unit tests already and thus will never occur in production
  86         throw new RuntimeException("TaxonName class misses at least one property of: " + ArrayUtils.toString(propertyNamesToCheck));
  87     }
  88
  89 }