Examples with DataWithEtag won.protocol.model.DataWithEtag used on opensource projects

Example 1 with DataWithEtag

use of won.protocol.model.DataWithEtag in project webofneeds by researchstudio-sat.

the class LinkedDataServiceImpl method getNeedDataset.

@Transactional
public DataWithEtag<Dataset> getNeedDataset(final URI needUri, String etag) {
    DataWithEtag<Need> data = null;
    try {
        data = needInformationService.readNeed(needUri, etag);
    } catch (NoSuchNeedException e) {
        return DataWithEtag.dataNotFound();
    }
    if (data.isNotFound()) {
        return DataWithEtag.dataNotFound();
    }
    if (!data.isChanged()) {
        return DataWithEtag.dataNotChanged(data);
    }
    Need need = data.getData();
    String newEtag = data.getEtag();
    // load the dataset from storage
    Dataset dataset = need.getDatatsetHolder().getDataset();
    Model metaModel = needModelMapper.toModel(need);
    Resource needResource = metaModel.getResource(needUri.toString());
    // add connections
    Resource connectionsContainer = metaModel.createResource(need.getNeedURI().toString() + "/connections");
    metaModel.add(metaModel.createStatement(needResource, WON.HAS_CONNECTIONS, connectionsContainer));
    // add need event container
    Resource needEventContainer = metaModel.createResource(need.getNeedURI().toString() + "#events", WON.EVENT_CONTAINER);
    metaModel.add(metaModel.createStatement(needResource, WON.HAS_EVENT_CONTAINER, needEventContainer));
    // add need event URIs
    Collection<MessageEventPlaceholder> messageEvents = need.getEventContainer().getEvents();
    for (MessageEventPlaceholder messageEvent : messageEvents) {
        metaModel.add(metaModel.createStatement(needEventContainer, RDFS.member, metaModel.getResource(messageEvent.getMessageURI().toString())));
    }
    // add WON node link
    needResource.addProperty(WON.HAS_WON_NODE, metaModel.createResource(this.resourceURIPrefix));
    // add meta model to dataset
    String needMetaInformationURI = uriService.createNeedSysInfoGraphURI(needUri).toString();
    dataset.addNamedModel(needMetaInformationURI, metaModel);
    addBaseUriAndDefaultPrefixes(dataset);
    return new DataWithEtag<>(dataset, newEtag, etag);
}

Example 2 with DataWithEtag

use of won.protocol.model.DataWithEtag in project webofneeds by researchstudio-sat.

the class LinkedDataServiceImpl method getConnectionDataset.

/**
 * ETag-aware method for obtaining connection data. Currently does not take into account new events, only changes
 * to the connection itself.
 * @param connectionUri
 * @param includeEventContainer
 * @param includeLatestEvent
 * @param etag
 * @return
 */
@Override
@Transactional
public DataWithEtag<Dataset> getConnectionDataset(final URI connectionUri, final boolean includeEventContainer, final boolean includeLatestEvent, final String etag) {
    DataWithEtag<Connection> data = null;
    Connection connection = null;
    data = needInformationService.readConnection(connectionUri, etag);
    if (data.isNotFound()) {
        return DataWithEtag.dataNotFound();
    }
    if (!data.isChanged()) {
        return DataWithEtag.dataNotChanged(data);
    }
    connection = data.getData();
    String newEtag = data.getEtag();
    // load the model from storage
    Model model = connectionModelMapper.toModel(connection);
    Model additionalData = connection.getDatasetHolder() == null ? null : connection.getDatasetHolder().getDataset().getDefaultModel();
    setNsPrefixes(model);
    if (additionalData != null) {
        model.add(additionalData);
    }
    // model.setNsPrefix("", connection.getConnectionURI().toString());
    // create connection member
    Resource connectionResource = model.getResource(connection.getConnectionURI().toString());
    // add WON node link
    connectionResource.addProperty(WON.HAS_WON_NODE, model.createResource(this.resourceURIPrefix));
    Dataset eventDataset = null;
    if (includeEventContainer) {
        // create event container and attach it to the member
        Resource eventContainer = model.createResource(connection.getConnectionURI().toString() + "/events");
        connectionResource.addProperty(WON.HAS_EVENT_CONTAINER, eventContainer);
        eventContainer.addProperty(RDF.type, WON.EVENT_CONTAINER);
        if (includeLatestEvent) {
            // we add the latest event in the connection
            Slice<MessageEventPlaceholder> latestEvents = messageEventRepository.findByParentURIFetchDatasetEagerly(connectionUri, new PageRequest(0, 1, new Sort(Sort.Direction.DESC, "creationDate")));
            if (latestEvents.hasContent()) {
                MessageEventPlaceholder event = latestEvents.getContent().get(0);
                // add the event's dataset
                eventDataset = setDefaults(event.getDatasetHolder().getDataset());
                // connect the event to its container
                eventContainer.addProperty(RDFS.member, model.getResource(event.getMessageURI().toString()));
            }
        }
        DatasetHolder datasetHolder = connection.getDatasetHolder();
        if (datasetHolder != null) {
            addAdditionalData(model, datasetHolder.getDataset().getDefaultModel(), connectionResource);
        }
    }
    Dataset connectionDataset = addBaseUriAndDefaultPrefixes(newDatasetWithNamedModel(createDataGraphUriFromResource(connectionResource), model));
    RdfUtils.addDatasetToDataset(connectionDataset, eventDataset);
    return new DataWithEtag<>(connectionDataset, newEtag, etag);
}

Example 3 with DataWithEtag

use of won.protocol.model.DataWithEtag in project webofneeds by researchstudio-sat.

the class JpaRepositoryBasedRdfStorageServiceImpl method loadModel.

@Override
public DataWithEtag<Model> loadModel(final URI resourceURI, String etag) {
    Integer version = Integer.valueOf(etag);
    DatasetHolder datasetHolder = datasetHolderRepository.findOneByUriAndVersionNot(resourceURI, version);
    DataWithEtag<Model> dataWithEtag = new DataWithEtag<Model>(datasetHolder == null ? null : datasetHolder.getDataset().getDefaultModel(), datasetHolder == null ? etag : Integer.toString(datasetHolder.getVersion()), etag);
    return dataWithEtag;
}

Example 4 with DataWithEtag

use of won.protocol.model.DataWithEtag in project webofneeds by researchstudio-sat.

the class JpaRepositoryBasedRdfStorageServiceImpl method loadDataset.

@Override
public DataWithEtag<Dataset> loadDataset(final URI resourceURI, String etag) {
    Integer version = etag == null ? -1 : Integer.valueOf(etag);
    DatasetHolder datasetHolder = datasetHolderRepository.findOneByUriAndVersionNot(resourceURI, version);
    DataWithEtag<Dataset> dataWithEtag = new DataWithEtag<Dataset>(datasetHolder == null ? null : datasetHolder.getDataset(), datasetHolder == null ? etag : Integer.toString(datasetHolder.getVersion()), etag);
    return dataWithEtag;
}

Example 5 with DataWithEtag

use of won.protocol.model.DataWithEtag in project webofneeds by researchstudio-sat.

the class LinkedDataServiceImpl method getDatasetForUri.

@Override
@Transactional
public DataWithEtag<Dataset> getDatasetForUri(URI datasetUri, String etag) {
    Integer version = etag == null ? -1 : Integer.valueOf(etag);
    DatasetHolder datasetHolder = datasetHolderRepository.findOneByUri(datasetUri);
    if (datasetHolder == null) {
        return DataWithEtag.dataNotFound();
    }
    if (version.intValue() == datasetHolder.getVersion()) {
        return DataWithEtag.dataNotChanged(etag);
    }
    Dataset dataset = datasetHolder.getDataset();
    DefaultPrefixUtils.setDefaultPrefixes(dataset.getDefaultModel());
    addBaseUriAndDefaultPrefixes(dataset);
    return new DataWithEtag<Dataset>(dataset, Integer.toString(datasetHolder.getVersion()), etag);
}