3 * Copyright © 2013 František Kučera (frantovo.cz)
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 package info.globalcode.sql.dk;
20 import info.globalcode.sql.dk.batch.Batch;
21 import info.globalcode.sql.dk.configuration.DatabaseDefinition;
22 import info.globalcode.sql.dk.formatting.ColumnsHeader;
23 import info.globalcode.sql.dk.formatting.Formatter;
24 import java.sql.Connection;
25 import java.sql.DriverManager;
26 import java.sql.PreparedStatement;
27 import java.sql.ResultSet;
28 import java.sql.SQLException;
32 * @author Ing. František Kučera (frantovo.cz)
34 public class DatabaseConnection {
36 private DatabaseDefinition databaseDefinition;
37 private Connection connection;
39 public DatabaseConnection(DatabaseDefinition databaseDefinition) throws SQLException {
40 this.databaseDefinition = databaseDefinition;
42 connection = DriverManager.getConnection(databaseDefinition.getUrl(), databaseDefinition.getUserName(), databaseDefinition.getPassword());
45 public void executeQuery(SQLCommand sqlCommand, Formatter formatter) throws SQLException {
46 formatter.writeStartDatabase(databaseDefinition);
47 processCommand(sqlCommand, formatter);
48 formatter.writeEndDatabase();
51 public void executeBatch(Batch batch, Formatter formatter) throws SQLException {
52 formatter.writeStartDatabase(databaseDefinition);
53 while (batch.hasNext()) {
54 processCommand(batch.next(), formatter);
56 formatter.writeEndDatabase();
59 private void processCommand(SQLCommand sqlCommand, Formatter formatter) throws SQLException {
60 try (PreparedStatement ps = sqlCommand.prepareStatement(connection)) {
61 sqlCommand.parametrize(ps);
63 boolean isRS = ps.execute();
65 try (ResultSet rs = ps.getResultSet()) {
66 processResultSet(sqlCommand, rs, formatter);
69 processUpdateResult(sqlCommand, ps, formatter);
72 while (ps.getMoreResults() || ps.getUpdateCount() > -1) {
73 ResultSet rs = ps.getResultSet();
75 processUpdateResult(sqlCommand, ps, formatter);
77 processResultSet(sqlCommand, rs, formatter);
84 private void processUpdateResult(SQLCommand sqlCommand, PreparedStatement ps, Formatter formatter) throws SQLException {
85 formatter.writeStartUpdatesResult();
86 formatter.writeQuery(sqlCommand.getQuery());
87 formatter.writeParameters(sqlCommand.getParameters());
89 int updatedRowsCount = ps.getUpdateCount();
90 formatter.writeUpdatedRowsCount(updatedRowsCount);
92 formatter.writeStartGeneratedKeys();
93 try (ResultSet rs = ps.getGeneratedKeys()) {
94 processResultSetRows(rs, formatter);
96 formatter.writeEndGeneratedKeys();
98 formatter.writeEndUpdatesResult();
101 private void processResultSet(SQLCommand sqlCommand, ResultSet rs, Formatter formatter) throws SQLException {
102 formatter.writeStartResultSet();
103 formatter.writeQuery(sqlCommand.getQuery());
104 formatter.writeParameters(sqlCommand.getParameters());
106 processResultSetRows(rs, formatter);
108 formatter.writeEndResultSet();
111 private void processResultSetRows(ResultSet rs, Formatter formatter) throws SQLException {
112 formatter.writeColumnsHeader(new ColumnsHeader(rs.getMetaData()));
113 int columnCount = rs.getMetaData().getColumnCount();
116 formatter.writeStartRow();
118 for (int i = 1; i <= columnCount; i++) {
119 formatter.writeColumnValue(rs.getObject(i));
122 formatter.writeEndRow();