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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.api.service;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.UUID;
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import java.util.stream.Collectors;
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import org.apache.http.HttpException;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import eu.etaxonomy.cdm.api.service.config.DeleteConfiguratorBase;
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import eu.etaxonomy.cdm.api.service.config.MediaDeletionConfigurator;
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import eu.etaxonomy.cdm.api.service.exception.ReferencedObjectUndeletableException;
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import eu.etaxonomy.cdm.api.service.pager.Pager;
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import eu.etaxonomy.cdm.api.service.pager.impl.DefaultPagerImpl;
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import eu.etaxonomy.cdm.common.media.ImageInfo;
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import eu.etaxonomy.cdm.common.monitor.IProgressMonitor;
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import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
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import eu.etaxonomy.cdm.model.common.CdmBase;
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import eu.etaxonomy.cdm.model.common.ICdmBase;
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import eu.etaxonomy.cdm.model.description.DescriptionBase;
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import eu.etaxonomy.cdm.model.description.IDescribable;
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import eu.etaxonomy.cdm.model.description.MediaKey;
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import eu.etaxonomy.cdm.model.description.SpecimenDescription;
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import eu.etaxonomy.cdm.model.description.TaxonDescription;
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import eu.etaxonomy.cdm.model.description.TaxonNameDescription;
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import eu.etaxonomy.cdm.model.description.TextData;
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import eu.etaxonomy.cdm.model.location.NamedArea;
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import eu.etaxonomy.cdm.model.media.Media;
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import eu.etaxonomy.cdm.model.media.MediaRepresentation;
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import eu.etaxonomy.cdm.model.media.MediaRepresentationPart;
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import eu.etaxonomy.cdm.model.media.Rights;
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import eu.etaxonomy.cdm.model.metadata.CdmPreference;
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import eu.etaxonomy.cdm.model.metadata.PreferencePredicate;
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import eu.etaxonomy.cdm.model.metadata.PreferenceSubject;
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import eu.etaxonomy.cdm.model.name.TaxonName;
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import eu.etaxonomy.cdm.model.occurrence.MediaSpecimen;
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import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase;
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import eu.etaxonomy.cdm.model.taxon.Taxon;
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import eu.etaxonomy.cdm.persistence.dao.media.IMediaDao;
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import eu.etaxonomy.cdm.strategy.cache.common.IIdentifiableEntityCacheStrategy;
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@Service
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@Transactional(readOnly=true)
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public class MediaServiceImpl extends IdentifiableServiceBase<Media,IMediaDao> implements IMediaService {
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public static final Integer IMAGE_READ_TIMEOUT = 3000;
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@Override
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@Autowired
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protected void setDao(IMediaDao dao) {
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this.dao = dao;
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}
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@Autowired
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private IOccurrenceService specimenService;
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@Autowired
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private ITaxonService taxonService;
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@Autowired
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private INameService nameService;
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@Autowired
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private IPreferenceService prefsService;
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@Override
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public Pager<MediaKey> getMediaKeys(Set<Taxon> taxonomicScope, Set<NamedArea> geoScopes, Integer pageSize, Integer pageNumber, List<String> propertyPaths) {
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long numberOfResults = dao.countMediaKeys(taxonomicScope, geoScopes);
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List<MediaKey> results = new ArrayList<>();
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if(numberOfResults > 0) { // no point checking again //TODO use AbstractPagerImpl.hasResultsInRange(numberOfResults, pageNumber, pageSize)
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results = dao.getMediaKeys(taxonomicScope, geoScopes, pageSize, pageNumber, propertyPaths);
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}
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return new DefaultPagerImpl<>(pageNumber, numberOfResults, pageSize, results);
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}
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@Override
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public Pager<Rights> getRights(Media t, Integer pageSize, Integer pageNumber, List<String> propertyPaths) {
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long numberOfResults = dao.countRights(t);
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List<Rights> results = new ArrayList<>();
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if(numberOfResults > 0) { // no point checking again //TODO use AbstractPagerImpl.hasResultsInRange(numberOfResults, pageNumber, pageSize)
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results = dao.getRights(t, pageSize, pageNumber,propertyPaths);
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}
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return new DefaultPagerImpl<>(pageNumber, numberOfResults, pageSize, results);
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}
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@Override
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@Transactional(readOnly = false)
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public UpdateResult updateCaches(Class<? extends Media> clazz, Integer stepSize, IIdentifiableEntityCacheStrategy<Media> cacheStrategy, IProgressMonitor monitor) {
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if (clazz == null){
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clazz = Media.class;
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}
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return super.updateCachesImpl(clazz, stepSize, cacheStrategy, monitor);
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}
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@Override
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@Transactional(readOnly=false)
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public DeleteResult delete(UUID mediaUuid, MediaDeletionConfigurator config) {
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DeleteResult result = new DeleteResult();
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Media media = this.load(mediaUuid);
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if (media == null){
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return result;
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}
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result = isDeletable(mediaUuid, config);
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if (result.isOk()){
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Set<CdmBase> references = commonService.getReferencingObjectsForDeletion(media);
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for (CdmBase ref: references){
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IDescribable<?> updatedObject = null;
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IService<ICdmBase> service = null;
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if (ref instanceof TextData){
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TextData textData = HibernateProxyHelper.deproxy(ref, TextData.class);
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DescriptionBase<?> description = HibernateProxyHelper.deproxy(textData.getInDescription(), DescriptionBase.class);
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IDescribable<?> objectToUpdate = null;
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boolean deleteIsMatchingInstance = false;
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if (description instanceof TaxonDescription){
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objectToUpdate = ((TaxonDescription)description).getTaxon();
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deleteIsMatchingInstance = config.getDeleteFrom() instanceof Taxon;
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service = (IService)taxonService;
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}else if (description instanceof SpecimenDescription){
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objectToUpdate = ((SpecimenDescription)description).getDescribedSpecimenOrObservation();
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deleteIsMatchingInstance = config.getDeleteFrom() instanceof SpecimenOrObservationBase;
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service = (IService)specimenService;
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}else if (description instanceof TaxonNameDescription){
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objectToUpdate = ((TaxonNameDescription)description).getTaxonName();
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deleteIsMatchingInstance = config.getDeleteFrom() instanceof TaxonName;
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service = (IService)nameService;
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}else{
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throw new RuntimeException("Unsupported DescriptionBase class");
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}
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if (objectToUpdate == null ){
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continue;
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} else if ( (config.isDeleteFromDescription() && deleteIsMatchingInstance &&
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config.getDeleteFrom().getId() == objectToUpdate.getId())
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|| config.isDeleteFromEveryWhere()){
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updatedObject = handleDeleteMedia(media, textData, description,
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(IDescribable)objectToUpdate);
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} else {
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// this should not be happen, because it is not deletable. see isDeletable
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result.setAbort();
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}
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// } else if (ref instanceof MediaSpecimen && config.getDeleteFrom().getId() == ref.getId() && config.getDeleteFrom() instanceof MediaSpecimen){
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// MediaSpecimen mediaSpecimen = HibernateProxyHelper.deproxy(ref, MediaSpecimen.class);
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// mediaSpecimen.setMediaSpecimen(null);
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// updatedObject = mediaSpecimen;
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// service = (IService)specimenService;
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}else if (ref instanceof MediaRepresentation){
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continue;
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}else {
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result.setAbort();
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}
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if (updatedObject != null){
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service.update(updatedObject); //service should always be != null if updatedObject != null
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result.addUpdatedObject((CdmBase)updatedObject);
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}
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}
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if (result.isOk()){
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dao.delete(media);
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result.addDeletedObject(media);
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}
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}
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return result;
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}
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/**
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* @param media
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* @param textData
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* @param desc
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* @param taxon
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*/
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private IDescribable<DescriptionBase<?>> handleDeleteMedia(Media media, TextData textData,
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DescriptionBase<?> desc, IDescribable<DescriptionBase<?>> describable) {
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while(textData.getMedia().contains(media)){
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textData.removeMedia(media);
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}
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//if the textData contains text it should not be deleted
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if (textData.getMedia().isEmpty() && textData.getMultilanguageText().isEmpty()){
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desc.removeElement(textData);
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}
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if (desc.getElements().isEmpty()){
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describable.removeDescription(desc);
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}
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return describable;
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}
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@Override
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public DeleteResult isDeletable(UUID mediaUuid, DeleteConfiguratorBase config){
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DeleteResult result = new DeleteResult();
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Media media = this.load(mediaUuid);
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Set<CdmBase> references = commonService.getReferencingObjectsForDeletion(media);
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MediaDeletionConfigurator mediaConfig = (MediaDeletionConfigurator)config;
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CdmBase deleteFrom = mediaConfig.getDeleteFrom();
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if (mediaConfig.isDeleteFromEveryWhere()){
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return result;
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}
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for (CdmBase ref: references){
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String message = null;
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if (ref instanceof MediaRepresentation){
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continue;
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}
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if (ref instanceof TextData){
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TextData textData = HibernateProxyHelper.deproxy(ref, TextData.class);
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DescriptionBase description = HibernateProxyHelper.deproxy(textData.getInDescription(), DescriptionBase.class);
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if (description instanceof TaxonDescription){
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TaxonDescription desc = HibernateProxyHelper.deproxy(description, TaxonDescription.class);
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if (desc.getTaxon() == null || (mediaConfig.isDeleteFromDescription() && (deleteFrom instanceof Taxon && ((Taxon)deleteFrom).getId() == desc.getTaxon().getId()))){
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continue;
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} else{
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message = "The media can't be deleted from the database because it is referenced by a taxon. ("+desc.getTaxon().getTitleCache()+")";
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result.setAbort();
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}
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} else if (description instanceof SpecimenDescription){
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SpecimenDescription desc = HibernateProxyHelper.deproxy(description, SpecimenDescription.class);
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if (desc.getDescribedSpecimenOrObservation() == null || (mediaConfig.isDeleteFromDescription() && (deleteFrom instanceof SpecimenOrObservationBase && ((SpecimenOrObservationBase)deleteFrom).getId() == desc.getDescribedSpecimenOrObservation().getId()))){
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continue;
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} else{
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message = "The media can't be deleted from the database because it is referenced by a specimen or observation. ("+desc.getDescribedSpecimenOrObservation().getTitleCache()+")";
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result.setAbort();
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}
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} else if (description instanceof TaxonNameDescription){
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TaxonNameDescription desc = HibernateProxyHelper.deproxy(description, TaxonNameDescription.class);
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if (desc.getTaxonName() == null || (mediaConfig.isDeleteFromDescription() && (deleteFrom instanceof TaxonName && ((TaxonName)deleteFrom).getId() == desc.getTaxonName().getId()))){
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continue;
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} else{
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message = "The media can't be deleted from the database because it is referenced by a scientific name. ("+desc.getTaxonName().getTitleCache()+")";
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result.setAbort();
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}
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}
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}if (ref instanceof MediaSpecimen){
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message = "The media can't be deleted from the database because it is referenced by a mediaspecimen. ("+((MediaSpecimen)ref).getTitleCache()+")";
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result.setAbort();
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}else {
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message = "The media can't be completely deleted because it is referenced by another " + ref.getUserFriendlyTypeName() ;
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result.setAbort();
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}
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if (message != null){
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result.addException(new ReferencedObjectUndeletableException(message));
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result.addRelatedObject(ref);
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}
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}
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return result;
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}
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/**
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* Reads the metadata as stored in the file or web resource and filters the data by the include and exclude lists of key names
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* as stored in the data base properties {@link PreferencePredicate#MediaMetadataKeynameExcludes} and {@link PreferencePredicate#MediaMetadataKeynameExcludes}
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* <p>
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* Metadata of multiple parts is merged into one common metadata map whereas the later part being read may overwrite data from previous parts.
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* The consequences of this can be neglected since we don't expect that multiple parts are actually being used.
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*
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* @param represenatation
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* @return
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* @throws IOException
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* @throws HttpException
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*/
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public Map<String, String> readResourceMetadataFiltered(MediaRepresentation represenatation) throws IOException, HttpException {
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List<String> includes = mediaMetadataKeyIncludes();
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List<String> excludes = mediaMetadataKeyExludes();
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Map<String, String> metadata = new HashMap<>();
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for(MediaRepresentationPart part : represenatation.getParts()) {
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ImageInfo iInfo = ImageInfo.NewInstance(part.getUri(), IMAGE_READ_TIMEOUT);
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metadata.putAll(iInfo.getMetaData());
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}
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if(!includes.isEmpty()) {
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metadata = metadata.entrySet()
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.stream()
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.filter( e -> containsCaseInsensitive(e.getKey(), includes))
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.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
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}
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if(!excludes.isEmpty()) {
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metadata = metadata.entrySet()
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.stream()
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.filter( e -> !containsCaseInsensitive(e.getKey(), excludes))
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.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
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}
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if(metadata == null) {
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metadata = new HashMap<>(0);
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}
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return metadata;
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}
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private boolean containsCaseInsensitive(String s, List<String> l){
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return l.stream().anyMatch(x -> x.equalsIgnoreCase(s));
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}
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protected List<String> mediaMetadataKeyExludes(){
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CdmPreference pref = prefsService.find(CdmPreference.NewKey(PreferenceSubject.NewDatabaseInstance(), PreferencePredicate.MediaMetadataKeynameExcludes));
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return pref.splitStringListValue();
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}
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protected List<String> mediaMetadataKeyIncludes(){
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CdmPreference pref = prefsService.find(CdmPreference.NewKey(PreferenceSubject.NewDatabaseInstance(), PreferencePredicate.MediaMetadataKeynameIncludes));
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return pref.splitStringListValue();
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}
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}
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