argos/dmp-backend/src/main/java/eu/eudat/managers/ExternalDatasetManager.java

package eu.eudat.managers;

import eu.eudat.builders.model.criteria.ExternalDatasetCriteriaBuilder;
import eu.eudat.builders.model.models.DataTableDataBuilder;
import eu.eudat.dao.entities.ExternalDatasetDao;
import eu.eudat.entities.ExternalDataset;
import eu.eudat.models.criteria.ExternalDatasetCriteria;
import eu.eudat.models.externaldataset.ExternalDatasetListingModel;
import eu.eudat.models.externaldataset.ExternalDatasetTableRequest;
import eu.eudat.models.helpers.common.DataTableData;
import eu.eudat.proxy.config.exceptions.HugeResultSet;
import eu.eudat.proxy.config.exceptions.NoURLFound;
import eu.eudat.proxy.fetching.RemoteFetcher;
import eu.eudat.queryable.QueryableList;
import eu.eudat.services.ApiContext;

import java.util.List;
import java.util.UUID;
import java.util.stream.Collectors;


public class ExternalDatasetManager {

    public DataTableData<ExternalDatasetListingModel> getPaged(ApiContext apiContext, ExternalDatasetTableRequest externalDatasetTableRequest) throws Exception {
        QueryableList<ExternalDataset> items = apiContext.getOperationsContext().getDatabaseRepository().getExternalDatasetDao().getWithCriteria(externalDatasetTableRequest.getCriteria());
        QueryableList<ExternalDataset> pagedItems = PaginationManager.applyPaging(items, externalDatasetTableRequest);
        List<ExternalDatasetListingModel> externalDatasetListingmodels = pagedItems.select(item -> new ExternalDatasetListingModel().fromDataModel(item));
        return apiContext.getOperationsContext().getBuilderFactory().getBuilder(DataTableDataBuilder.class).data(externalDatasetListingmodels).totalCount(items.count()).build();
    }

    public List<ExternalDatasetListingModel> getWithExternal(ApiContext apiContext, String query, RemoteFetcher remoteFetcher) throws HugeResultSet, NoURLFound, InstantiationException, IllegalAccessException {
        ExternalDatasetCriteria criteria = apiContext.getOperationsContext().getBuilderFactory().getBuilder(ExternalDatasetCriteriaBuilder.class).like(query).build();
        QueryableList<eu.eudat.entities.ExternalDataset> items = apiContext.getOperationsContext().getDatabaseRepository().getExternalDatasetDao().getWithCriteria(criteria);
        List<ExternalDatasetListingModel> externalDatasets = items.select(item -> new ExternalDatasetListingModel().fromDataModel(item));
        return externalDatasets;
    }

    public ExternalDatasetListingModel getSingle(ExternalDatasetDao externalDatasetDao, UUID id) throws HugeResultSet, NoURLFound, InstantiationException, IllegalAccessException {
        ExternalDataset externalDataset = externalDatasetDao.find(id);
        ExternalDatasetListingModel externalDatasetModel = new ExternalDatasetListingModel();
        externalDatasetModel.fromDataModel(externalDataset);
        return externalDatasetModel;
    }
}