/** Creates tables if they do not exist. */
private void initializeTables() {
Connection conn = null;
Statement statement = null;
try {
conn = retrieveConnection();
statement = conn.createStatement();
statement.setQueryTimeout(30);
// One table holding the playername id relation
String playerQuery =
String.format(
"CREATE TABLE IF NOT EXISTS %s (id INTEGER PRIMARY KEY AUTOINCREMENT, %s STRING)",
playerTable, "name");
statement.executeUpdate(playerQuery);
// One column for every message
StringBuilder columns = new StringBuilder();
for (MessageNode node : MessageNode.getMessageNodes()) {
MsgCategory cat = messages.getCat(node);
if (node.getColumnName() != null
&& (cat == MsgCategory.TUTORIAL || cat == MsgCategory.ONE_TIME)) {
columns.append(',');
columns.append(node.getColumnName());
}
}
String msgQuery =
String.format(
"CREATE TABLE IF NOT EXISTS %s (id INTEGER PRIMARY KEY UNIQUE %s)",
msgTable, columns);
statement.executeUpdate(msgQuery);
// Check if all columns are present
DatabaseMetaData dmd = conn.getMetaData();
// Add missing columns
for (MessageNode node : MessageNode.getMessageNodes()) {
MsgCategory cat = messages.getCat(node);
if (cat == MsgCategory.TUTORIAL || cat == MsgCategory.ONE_TIME) {
ResultSet set = dmd.getColumns(null, null, msgTable, node.getColumnName());
if (!set.next()) {
String updateQuery =
String.format("ALTER TABLE %s ADD COLUMN %s", msgTable, node.getColumnName());
statement.executeUpdate(updateQuery);
}
}
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
try {
if (conn != null) conn.close();
if (statement != null) statement.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
