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

   1 // $Id$
   2 /**
   3  * Copyright (C) 2007 EDIT
   4  * European Distributed Institute of Taxonomy
   5  * http://www.e-taxonomy.eu
   6  *
   7  * The contents of this file are subject to the Mozilla Public License Version 1.1
   8  * See LICENSE.TXT at the top of this package for the full license terms.
   9  */
  10 package eu.etaxonomy.cdm.api.service;
  11
  12 import java.util.ArrayList;
  13 import java.util.Iterator;
  14 import java.util.List;
  15 import java.util.Set;
  16
  17 import org.hibernate.envers.query.criteria.AuditCriterion;
  18 import org.springframework.beans.factory.annotation.Autowired;
  19 import org.springframework.transaction.annotation.Transactional;
  20
  21 import eu.etaxonomy.cdm.api.service.config.DeleteConfiguratorBase;
  22 import eu.etaxonomy.cdm.api.service.pager.Pager;
  23 import eu.etaxonomy.cdm.api.service.pager.impl.DefaultPagerImpl;
  24 import eu.etaxonomy.cdm.model.common.CdmBase;
  25 import eu.etaxonomy.cdm.model.common.VersionableEntity;
  26 import eu.etaxonomy.cdm.model.view.AuditEvent;
  27 import eu.etaxonomy.cdm.model.view.AuditEventRecord;
  28 import eu.etaxonomy.cdm.persistence.dao.common.AuditEventSort;
  29 import eu.etaxonomy.cdm.persistence.dao.common.IVersionableDao;
  30
  31 public abstract class VersionableServiceBase<T extends VersionableEntity, DAO extends IVersionableDao<T>> extends ServiceBase<T,DAO> implements IVersionableService<T> {
  32         @Autowired
  33     protected ICommonService commonService;
  34         @Transactional(readOnly = true)
  35         public Pager<AuditEventRecord<T>> pageAuditEvents(T t, Integer pageSize,        Integer pageNumber, AuditEventSort sort, List<String> propertyPaths) {
  36                 Integer numberOfResults = dao.countAuditEvents(t, sort);
  37
  38                 List<AuditEventRecord<T>> results = new ArrayList<AuditEventRecord<T>>();
  39                 if(numberOfResults > 0) { // no point checking again //TODO use AbstractPagerImpl.hasResultsInRange(numberOfResults, pageNumber, pageSize)
  40                         results = dao.getAuditEvents(t, pageSize, pageNumber, sort,propertyPaths);
  41                 }
  42
  43                 return new DefaultPagerImpl<AuditEventRecord<T>>(pageNumber, numberOfResults, pageSize, results);
  44         }
  45
  46         @Transactional(readOnly = true)
  47         public AuditEventRecord<T> getNextAuditEvent(T t) {
  48                 return dao.getNextAuditEvent(t);
  49         }
  50
  51         @Transactional(readOnly = true)
  52         public AuditEventRecord<T> getPreviousAuditEvent(T t) {
  53                 return dao.getPreviousAuditEvent(t);
  54         }
  55
  56         @Transactional(readOnly = true)
  57         public Pager<AuditEventRecord<T>> pageAuditEvents(Class<? extends T> clazz,AuditEvent from,AuditEvent to, List<AuditCriterion> criteria, Integer pageSize, Integer pageNumber, AuditEventSort sort,List<String> propertyPaths) {
  58                 Integer numberOfResults = dao.countAuditEvents(clazz, from, to, criteria);
  59
  60                 List<AuditEventRecord<T>> results = new ArrayList<AuditEventRecord<T>>();
  61                 if(numberOfResults > 0) { // no point checking again //TODO use AbstractPagerImpl.hasResultsInRange(numberOfResults, pageNumber, pageSize)
  62                         results = dao.getAuditEvents(clazz,from,to,criteria, pageSize, pageNumber, sort,propertyPaths);
  63                 }
  64
  65                 return new DefaultPagerImpl<AuditEventRecord<T>>(pageNumber, numberOfResults, pageSize, results);
  66         }
  67
  68          /**
  69      * the basic isDeletable method return false if the object is referenced from any other object.
  70      */
  71
  72     @Override
  73     public List<String> isDeletable(T base, DeleteConfiguratorBase config){
  74         List<String> result = new ArrayList<String>();
  75         Set<CdmBase> references = commonService.getReferencingObjects(base);
  76         Iterator<CdmBase> iterator = references.iterator();
  77         CdmBase ref;
  78         while (iterator.hasNext()){
  79                 ref = iterator.next();
  80                 String message = "An object of " + ref.getClass().getName() + " with ID " + ref.getId() + " is referencing the object" ;
  81                 result.add(message);
  82         }
  83         return result;
  84     }
  85
  86 }