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SqlTimeSeriesMetaInformationSource.java
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SqlTimeSeriesMetaInformationSource.java
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/*
* © 2022. TU Dortmund University,
* Institute of Energy Systems, Energy Efficiency and Energy Economics,
* Research group Distribution grid planning and operation
*/
package edu.ie3.datamodel.io.source.sql;
import edu.ie3.datamodel.io.connectors.SqlConnector;
import edu.ie3.datamodel.io.factory.FactoryData;
import edu.ie3.datamodel.io.factory.SimpleEntityData;
import edu.ie3.datamodel.io.factory.timeseries.TimeSeriesMetaInformationFactory;
import edu.ie3.datamodel.io.naming.DatabaseNamingStrategy;
import edu.ie3.datamodel.io.naming.timeseries.ColumnScheme;
import edu.ie3.datamodel.io.naming.timeseries.IndividualTimeSeriesMetaInformation;
import edu.ie3.datamodel.io.source.TimeSeriesMetaInformationSource;
import edu.ie3.datamodel.utils.TimeSeriesUtils;
import edu.ie3.datamodel.utils.Try;
import java.util.Map;
import java.util.Optional;
import java.util.UUID;
import java.util.function.Function;
import java.util.stream.Collectors;
/** SQL implementation for retrieving {@link TimeSeriesMetaInformationSource} from the SQL scheme */
public class SqlTimeSeriesMetaInformationSource
extends SqlDataSource<IndividualTimeSeriesMetaInformation>
implements TimeSeriesMetaInformationSource {
private static final TimeSeriesMetaInformationFactory mappingFactory =
new TimeSeriesMetaInformationFactory();
private final DatabaseNamingStrategy namingStrategy;
private final Map<UUID, IndividualTimeSeriesMetaInformation> mapping;
public SqlTimeSeriesMetaInformationSource(
SqlConnector connector, String schemaName, DatabaseNamingStrategy namingStrategy) {
super(connector);
this.namingStrategy = namingStrategy;
String queryComplete = createQueryComplete(schemaName);
this.mapping =
executeQuery(queryComplete, ps -> {}).stream()
.collect(
Collectors.toMap(
IndividualTimeSeriesMetaInformation::getUuid, Function.identity()));
}
/**
* Creates a query that retrieves all time series uuid from existing time series tables.
*
* @param schemaName schema that the time series reside in
* @return query String
*/
private String createQueryComplete(String schemaName) {
Map<String, ColumnScheme> acceptedTableNames =
TimeSeriesUtils.getAcceptedColumnSchemes().stream()
.collect(
Collectors.toMap(
namingStrategy::getTimeSeriesEntityName, columnScheme -> columnScheme));
Iterable<String> selectQueries =
getDbTables(schemaName, namingStrategy.getTimeSeriesPrefix() + "%").stream()
.map(
tableName ->
Optional.ofNullable(acceptedTableNames.get(tableName))
.map(
columnScheme ->
"SELECT DISTINCT time_series, '"
+ columnScheme.getScheme()
+ "' as column_scheme FROM "
+ schemaName
+ "."
+ tableName))
.flatMap(Optional::stream)
.toList();
return String.join("\nUNION\n", selectQueries) + ";";
}
@Override
public Map<UUID, IndividualTimeSeriesMetaInformation> getTimeSeriesMetaInformation() {
return this.mapping;
}
@Override
public Optional<IndividualTimeSeriesMetaInformation> getTimeSeriesMetaInformation(
UUID timeSeriesUuid) {
return Optional.ofNullable(this.mapping.get(timeSeriesUuid));
}
@Override
protected Optional<IndividualTimeSeriesMetaInformation> createEntity(
Map<String, String> fieldToValues) {
SimpleEntityData entityData =
new SimpleEntityData(
new FactoryData.MapWithRowIndex("-1", fieldToValues),
IndividualTimeSeriesMetaInformation.class);
return Optional.of(mappingFactory.get(entityData)).map(Try::getOrThrow);
}
}