/**
* Retrieves different specified items from a special IRDI from de_class.
*
* @param Statement: A Statement object for sending SQL statements to the database.
* @param tableNames: A collection of column tables
* @param irdi: The official unique identifier.
* @throws implementation_exception
*/
public Dictionary<String, String> GetSelectedItemsFromClass(
Statement statement, String[] tableNames, String irdi) throws implementation_exception {
ResultSet resultSet = null;
try {
Dictionary<String, String> resultBuffer = new Hashtable<String, String>();
String internalId = GetInternalId(statement, irdi);
if (internalId.contentEquals("null") || internalId.length() == 0) {
String expression = String.format("select * from de_class where IRDI = '%s'", irdi);
;
resultSet = statement.executeQuery(expression);
} else {
String expression =
String.format("select * from table (pkgProperty.gettable( %s ))", internalId);
;
resultSet = statement.executeQuery(expression);
}
while (resultSet.next()) {
for (int index = 0; index < tableNames.length; index++) {
if (resultSet.getString(tableNames[index]) == null) {
resultBuffer.put(tableNames[index], "");
} else {
resultBuffer.put(tableNames[index], resultSet.getString(tableNames[index]));
}
}
}
return resultBuffer;
} catch (SQLException exception) {
WebServiceLogger.Log(
"DatabaseAccess.java",
"GetInternalIrdi",
String.format("Get selected item failed: %s", exception.getMessage()));
throw new implementation_exception(
String.format("Close connection failed: %s", exception.getMessage()),
exception.getErrorCode());
} finally {
if (resultSet != null) {
try {
resultSet.close();
} catch (SQLException exception) {
WebServiceLogger.Log(
"DatabaseAccess.java",
"GetInternalIrdi",
String.format("Close connection failed: %s", exception.getMessage()));
throw new implementation_exception(
String.format("Close connection failed: %s", exception.getMessage()),
exception.getErrorCode());
}
}
}
}
/**
* Retrieve the selected item.
*
* @param Statement: A Statement object for sending SQL statements to the database.
* @param tableColumn: The name of the table column.
* @param tableName: The name of the table.
* @param tableRow: The name of the table row.
* @param value: The value to compare with.
* @throws implementation_exception
*/
public String GetSelectedItem(
Statement statement, String tableColumn, String tableName, String tableRow, String value)
throws implementation_exception {
ResultSet resultSet = null;
try {
String expression =
String.format(
"select %s from %s where %s = '%s'", tableColumn, tableName, tableRow, value);
;
resultSet = statement.executeQuery(expression);
StringBuffer resultBuffer = new StringBuffer();
while (resultSet.next()) {
if (resultSet.getString(tableColumn) == null) {
resultBuffer.append("");
}
resultBuffer.append(resultSet.getString(tableColumn));
}
return resultBuffer.toString();
} catch (SQLException exception) {
WebServiceLogger.Log(
"DatabaseAccess.java",
"GetSelectedItem",
String.format(
"Get selected item %s from colum %s tableName %s tableRow %s "
+ "with value %s failed: %s",
tableColumn, tableName, tableRow, value, exception.getMessage()));
throw new implementation_exception(
String.format("Close connection failed: %s", exception.getMessage()),
exception.getErrorCode());
} finally {
if (resultSet != null) {
try {
resultSet.close();
} catch (SQLException exception) {
WebServiceLogger.Log(
"DatabaseAccess.java",
"GetInternalIrdi",
String.format("Close connection failed: %s", exception.getMessage()));
throw new implementation_exception(
String.format("Close connection failed: %s", exception.getMessage()),
exception.getErrorCode());
}
}
}
}
@Override
public void Dispose() {
try {
if (_connection != null) {
_connection.close();
}
} catch (SQLException e) {
WebServiceLogger.Log(
"DatabaseAccess.java",
"Dispose",
String.format("Close connection failed: %s", e.getMessage()));
}
}
/**
* Retrieve the internal id.
*
* @param Statement: A Statement object for sending SQL statements to the database.
* @param irdi: The official identifier.
* @throws implementation_exception
*/
private String GetInternalId(Statement statement, String irdi) throws implementation_exception {
ResultSet resultSet = null;
try {
String queryInternalIrdi = String.format("PKGPROPERTY.GETID('%s')", irdi);
String getInternalId = String.format("SELECT %s FROM DUAL", queryInternalIrdi);
;
resultSet = statement.executeQuery(getInternalId);
StringBuffer resultBuffer = new StringBuffer();
while (resultSet.next()) {
resultBuffer.append(resultSet.getString(queryInternalIrdi));
}
return resultBuffer.toString();
} catch (SQLException exception) {
WebServiceLogger.Log(
"DatabaseAccess.java",
"GetInternalIrdi",
String.format("Get internal irdi %s failed: %s", irdi, exception.getMessage()));
throw new implementation_exception(
String.format("Get internal irdi failed: %s", exception.getMessage()),
exception.getErrorCode());
} finally {
if (resultSet != null) {
try {
resultSet.close();
} catch (SQLException exception) {
WebServiceLogger.Log(
"DatabaseAccess.java",
"GetInternalIrdi",
String.format("Close connection failed: %s", exception.getMessage()));
throw new implementation_exception(
String.format("Close connection failed: %s", exception.getMessage()),
exception.getErrorCode());
}
}
}
}
/**
* Opens the database.
*
* @return Statement: A Statement object for sending SQL statements to the database.
* @throws implementation_exception
*/
public Statement OpenDatabase() throws implementation_exception {
oracle.jdbc.OracleDriver driver = new oracle.jdbc.OracleDriver();
try {
DriverManager.registerDriver(driver);
_connection =
DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE", "Workdemo", "admin");
return _connection.createStatement();
} catch (SQLException exception) {
WebServiceLogger.Log(
"DatabaseAccess.java",
"OpenDatabase",
String.format("Open connection failed: %s", exception.getMessage()));
throw new implementation_exception(
String.format("Open database failed: %s", exception.getMessage()),
exception.getErrorCode());
}
}