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/*
* _____________________________________________________________________________
*
* INAF - OATS National Institute for Astrophysics - Astronomical Observatory of
* Trieste INAF - IA2 Italian Center for Astronomical Archives
* _____________________________________________________________________________
*
* Copyright (C) 2016 Istituto Nazionale di Astrofisica
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License Version 3 as published by the
* Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package it.inaf.ia2.tsm;
import it.inaf.ia2.tsm.datalayer.Credentials;
import it.inaf.ia2.tsm.datalayer.DatabaseType;
import it.inaf.ia2.tsm.datalayer.DBWrapper;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import javax.sql.DataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Utility class that contains static methods for managing {@link Schema}s into
* the database.
*
* @author Sonia Zorba {@literal <zorba at oats.inaf.it>}
*/
public class DaoSchema {
//
// private static final Logger log = LoggerFactory.getLogger(DaoSchema.class);
//
// public static List<String> getAllSchemasNames(Credentials credentials) throws SQLException {
// DataSource ds = TSMUtil.createDataSource(credentials);
// return getAllSchemasNames(ds, credentials.getDatabaseType());
// }
//
// /**
// * Retrieve the list of the names of the all the schemas contained into the
// * database specified by the <code>DataSource</code> parameter.
// *
// * @return list of schemas names alphabetically and case insensitively
// * ordered.
// */
// public static List<String> getAllSchemasNames(DataSource dataSource, DatabaseType dbType) throws SQLException {
//
// log.debug("getAllSchemasNames");
//
// String query;
// if (dbType == DatabaseType.MYSQL) {
// query = "SHOW DATABASES";
// } else if (dbType == DatabaseType.POSTGRES) {
// query = "SELECT schema_name FROM information_schema.schemata";
// } else {
// throw new UnsupportedOperationException("Database type " + dbType + " not supported");
// }
//
// log.debug("Executing query {}", query);
//
// List<String> allSchemas = new ArrayList<>();
//
// try (Connection connection = dataSource.getConnection();
// Statement statement = connection.createStatement();
// ResultSet resultSet = statement.executeQuery(query)) {
// while (resultSet.next()) {
// allSchemas.add(resultSet.getString(1));
// }
// }
//
// log.debug("{} schemas found", allSchemas.size());
//
// return TSMUtil.sortStringsList(allSchemas);
// }
//
// /**
// * Retrieves saved {@code Schema}s from the database and add them into the
// * specified {@code TapSchema}.
// */
// protected static void fillSavedSchemas(DBWrapper dbWrapper, final TapSchema tapSchema) throws SQLException {
//
// log.debug("fillSavedSchemas");
//
// SelectQueryBuilder selectQueryBuilder = new SelectQueryBuilder(dbWrapper.getTapSchemaDatabaseType(), tapSchema, TapSchema.SCHEMAS_TABLE) {
//
// @Override
// protected TapSchemaEntity getEntity(ResultSet rs) throws SQLException {
// String schemaName = rs.getString("schema_name");
// Schema schema = tapSchema.addChild(schemaName);
// if (schema == null) {
// return null;
// }
// schema.setStatus(Status.ADDED_PERSISTED);
// return schema;
// }
// };
//
// selectQueryBuilder.executeQuery(dbWrapper.getTapSchemaConnection());
// }
//
// /**
// * Save a new {@code Schema} into the TAP_SCHEMA schema.
// */
// protected static void insertNewSchema(DatabaseType dbType, Connection connection, TapSchema tapSchema, Schema schema) throws SQLException {
//
// log.debug("insertNewSchema");
//
// InsertQueryBuilder insertQueryBuilder = new InsertQueryBuilder(dbType, tapSchema, schema, TapSchema.SCHEMAS_TABLE);
// insertQueryBuilder.executeQuery(connection);
// }
//
// /**
// * Updates an existing {@code Schema}.
// */
// protected static void updateSchema(DatabaseType dbType, Connection connection, TapSchema tapSchema, Schema schema) throws SQLException {
//
// UpdateQueryBuilder updateQueryBuilder = new UpdateQueryBuilder(dbType, tapSchema, schema, TapSchema.SCHEMAS_TABLE, "schema_name = ?");
//
// String query = updateQueryBuilder.getQuery();
//
// try (PreparedStatement statement = connection.prepareStatement(query)) {
//
// log.debug("Executing query {}", query);
//
// int i = updateQueryBuilder.addStatementValues(statement);
// statement.setString(i, schema.getName());
//
// statement.executeUpdate();
// }
// }
}