e4s.db
Interface E4DBConnection_Intf

All Known Implementing Classes:

E4DBConnectionDefault, E4DBConnectionTransactional

public interface E4DBConnection_Intf

Interface for database access.

E4DBConnectionDefault	A single statement transaction (SST) connection which is recommended to be used for common and almost reading tasks, created early after application startup and valid until end of the application. Only one entity per database.
E4DBConnectionTransactional	Recommended to be used whenever transactions (commit/rollback) are required. Multiple instances, may force database or JDBC license to run out of connections in some cases.

Method Summary

void	close()
boolean	connectionIsPooled()
java.lang.String	getCatalog() Get the catalog.
java.sql.DatabaseMetaData	getDatabaseMetaData() Get the database meta data.
int	getDatabaseType()
java.lang.String	getID()
java.util.Vector	getIndexes(E4DBTableName tablename) Retrieve all index names out of the current database connection for the specified table.
E4DBStatement	getStatement() Create a new JDBC/SQL Statement.
java.util.Vector	getTables() Retrieve all tables out of the current database connection.
boolean	istabledefined(E4DBTableName check_tablename) Check for existance of a table

Method Detail

getStatement

E4DBStatement getStatement()
                           throws E4DBException

Create a new JDBC/SQL Statement.

Returns:

the new created Statement, associated with this current connection.

Throws:

E4DBException

getDatabaseMetaData

java.sql.DatabaseMetaData getDatabaseMetaData()
                                              throws E4DBException

Get the database meta data.

Returns:

the metadata information

Throws:

E4DBException

getIndexes

java.util.Vector getIndexes(E4DBTableName tablename)
                            throws E4DBException

Retrieve all index names out of the current database connection for the specified table.

Parameters:

tablename - the table to lookup

Returns:

a Vector of elements of type String

Throws:

E4DBException

getTables

java.util.Vector getTables()
                           throws E4DBException

Retrieve all tables out of the current database connection.

Returns:

a Vector of elements of type e4s.db.dict

Throws:

E4DBException

See Also:

E4DBTableName, #istabledefined(TableName)

istabledefined

boolean istabledefined(E4DBTableName check_tablename)
                       throws E4DBException

Check for existance of a table

Parameters:

check_tablename - the table who's existance to be prooven

Returns:

true, if the table exists

Throws:

E4DBException

See Also:

E4DBTableName, getTables()

connectionIsPooled

boolean connectionIsPooled()

close

void close()
           throws E4DBException

Throws:

E4DBException

getCatalog

java.lang.String getCatalog()
                            throws E4DBException

Get the catalog.

Returns:

the catalog

Throws:

E4DBException

getDatabaseType

int getDatabaseType()

getID

java.lang.String getID()