franta-hg@26: /**
franta-hg@26:  * SQL-DK
franta-hg@26:  * Copyright © 2013 František Kučera (frantovo.cz)
franta-hg@26:  *
franta-hg@26:  * This program is free software: you can redistribute it and/or modify
franta-hg@26:  * it under the terms of the GNU General Public License as published by
franta-hg@26:  * the Free Software Foundation, either version 3 of the License, or
franta-hg@26:  * (at your option) any later version.
franta-hg@26:  *
franta-hg@26:  * This program is distributed in the hope that it will be useful,
franta-hg@26:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
franta-hg@26:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
franta-hg@26:  * GNU General Public License for more details.
franta-hg@26:  *
franta-hg@26:  * You should have received a copy of the GNU General Public License
franta-hg@26:  * along with this program. If not, see <http://www.gnu.org/licenses/>.
franta-hg@26:  */
franta-hg@27: package info.globalcode.sql.dk;
franta-hg@27: 
franta-hg@29: import info.globalcode.sql.dk.batch.Batch;
franta-hg@27: import info.globalcode.sql.dk.configuration.DatabaseDefinition;
franta-hg@34: import info.globalcode.sql.dk.formatting.ColumnsHeader;
franta-hg@29: import info.globalcode.sql.dk.formatting.Formatter;
franta-hg@28: import java.sql.Connection;
franta-hg@28: import java.sql.DriverManager;
franta-hg@29: import java.sql.PreparedStatement;
franta-hg@29: import java.sql.ResultSet;
franta-hg@28: import java.sql.SQLException;
franta-hg@26: 
franta-hg@26: /**
franta-hg@26:  *
franta-hg@26:  * @author Ing. František Kučera (frantovo.cz)
franta-hg@26:  */
franta-hg@42: public class DatabaseConnection implements AutoCloseable {
franta-hg@26: 
franta-hg@26: 	private DatabaseDefinition databaseDefinition;
franta-hg@28: 	private Connection connection;
franta-hg@26: 
franta-hg@28: 	public DatabaseConnection(DatabaseDefinition databaseDefinition) throws SQLException {
franta-hg@26: 		this.databaseDefinition = databaseDefinition;
franta-hg@28: 
franta-hg@34: 		connection = DriverManager.getConnection(databaseDefinition.getUrl(), databaseDefinition.getUserName(), databaseDefinition.getPassword());
franta-hg@26: 	}
franta-hg@29: 
franta-hg@29: 	public void executeQuery(SQLCommand sqlCommand, Formatter formatter) throws SQLException {
franta-hg@29: 		formatter.writeStartDatabase(databaseDefinition);
franta-hg@29: 		processCommand(sqlCommand, formatter);
franta-hg@29: 		formatter.writeEndDatabase();
franta-hg@29: 	}
franta-hg@29: 
franta-hg@29: 	public void executeBatch(Batch batch, Formatter formatter) throws SQLException {
franta-hg@29: 		formatter.writeStartDatabase(databaseDefinition);
franta-hg@29: 		while (batch.hasNext()) {
franta-hg@29: 			processCommand(batch.next(), formatter);
franta-hg@29: 		}
franta-hg@29: 		formatter.writeEndDatabase();
franta-hg@29: 	}
franta-hg@29: 
franta-hg@29: 	private void processCommand(SQLCommand sqlCommand, Formatter formatter) throws SQLException {
franta-hg@29: 		try (PreparedStatement ps = sqlCommand.prepareStatement(connection)) {
franta-hg@29: 			sqlCommand.parametrize(ps);
franta-hg@35: 
franta-hg@35: 			boolean isRS = ps.execute();
franta-hg@35: 			if (isRS) {
franta-hg@35: 				try (ResultSet rs = ps.getResultSet()) {
franta-hg@37: 					processResultSet(sqlCommand, rs, formatter);
franta-hg@35: 				}
franta-hg@35: 			} else {
franta-hg@37: 				processUpdateResult(sqlCommand, ps, formatter);
franta-hg@35: 			}
franta-hg@35: 
franta-hg@35: 			while (ps.getMoreResults() || ps.getUpdateCount() > -1) {
franta-hg@37: 				ResultSet rs = ps.getResultSet();
franta-hg@37: 				if (rs == null) {
franta-hg@37: 					processUpdateResult(sqlCommand, ps, formatter);
franta-hg@37: 				} else {
franta-hg@37: 					processResultSet(sqlCommand, rs, formatter);
franta-hg@37: 					rs.close();
franta-hg@37: 				}
franta-hg@29: 			}
franta-hg@29: 		}
franta-hg@37: 	}
franta-hg@37: 
franta-hg@37: 	private void processUpdateResult(SQLCommand sqlCommand, PreparedStatement ps, Formatter formatter) throws SQLException {
franta-hg@37: 		formatter.writeStartUpdatesResult();
franta-hg@37: 		formatter.writeQuery(sqlCommand.getQuery());
franta-hg@37: 		formatter.writeParameters(sqlCommand.getParameters());
franta-hg@41: 		formatter.writeUpdatedRowsCount(ps.getUpdateCount());
franta-hg@37: 		formatter.writeEndUpdatesResult();
franta-hg@37: 	}
franta-hg@37: 
franta-hg@37: 	private void processResultSet(SQLCommand sqlCommand, ResultSet rs, Formatter formatter) throws SQLException {
franta-hg@37: 		formatter.writeStartResultSet();
franta-hg@37: 		formatter.writeQuery(sqlCommand.getQuery());
franta-hg@37: 		formatter.writeParameters(sqlCommand.getParameters());
franta-hg@37: 
franta-hg@37: 		processResultSetRows(rs, formatter);
franta-hg@29: 
franta-hg@29: 		formatter.writeEndResultSet();
franta-hg@29: 	}
franta-hg@29: 
franta-hg@37: 	private void processResultSetRows(ResultSet rs, Formatter formatter) throws SQLException {
franta-hg@34: 		formatter.writeColumnsHeader(new ColumnsHeader(rs.getMetaData()));
franta-hg@34: 		int columnCount = rs.getMetaData().getColumnCount();
franta-hg@34: 
franta-hg@29: 		while (rs.next()) {
franta-hg@29: 			formatter.writeStartRow();
franta-hg@29: 
franta-hg@34: 			for (int i = 1; i <= columnCount; i++) {
franta-hg@34: 				formatter.writeColumnValue(rs.getObject(i));
franta-hg@34: 			}
franta-hg@34: 
franta-hg@29: 			formatter.writeEndRow();
franta-hg@29: 		}
franta-hg@34: 
franta-hg@29: 	}
franta-hg@42: 
franta-hg@42: 	@Override
franta-hg@42: 	public void close() throws SQLException {
franta-hg@42: 		connection.close();
franta-hg@42: 	}
franta-hg@26: }