Package org.wso2.carbon.database.utils.jdbc

Class JdbcTemplate

java.lang.Object

org.wso2.carbon.database.utils.jdbc.JdbcTemplate

public class JdbcTemplate
extends Object

A utility class to call JDBC with lambda expressions. This class simplifies the usage of JDBC and helps to avoid common errors. Using this class we can execute insert, select, update and delete queries by providing necessary parameters to the methods. Transaction support is also available with this implementation for the query executions. All the SQL operations performed by this class are logged at the debug level.

Constructor Summary

Constructors

Constructor	Description
JdbcTemplate(DataSource dataSource)

Method Summary

Modifier and Type	Method	Description
<T> int	executeBatchDelete(String query, QueryFilter queryFilter)	Executes the jdbc batch delete query.
<T> int	executeBatchInsert(String query, QueryFilter queryFilter, T bean)	Executes the jdbc insert/update query.
<T> int	executeInsert(String query, QueryFilter queryFilter, T bean, boolean fetchInsertedId)	Executes the jdbc insert/update query.
<T> int	executeInsert(String query, QueryFilter queryFilter, T bean, boolean fetchInsertedId, String autoGenerateIdColumnName)	Executes the jdbc insert/update query depends on provided auto generated column name.
<T> List<T>	executeQuery(String query, RowMapper<T> rowMapper)	Executes a query on JDBC and return the result as a list of domain objects.
<T> List<T>	executeQuery(String query, RowMapper<T> rowMapper, QueryFilter queryFilter)	Executes a query on JDBC and return the result as a list of domain objects.
int	executeUpdate(String query)	Executes the jdbc update query and returns the result as updated id integer.
void	executeUpdate(String query, QueryFilter queryFilter)	Executes the jdbc update query and returns nothing.
<T> T	fetchSingleRecord(String query, RowMapper<T> rowMapper, QueryFilter queryFilter)	Executes a query on JDBC and return the result as a domain object.
String	getDatabaseProductName()	Retrieve database product name from the data source.
String	getDriverName()
<T,E extends Exception> T	withTransaction(ExecuteCallable<T> callable)	Provides the transaction support for the JDBC executions of the template.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JdbcTemplate

public JdbcTemplate(DataSource dataSource)

Method Detail

withTransaction

public <T,E extends Exception> T withTransaction(ExecuteCallable<T> callable)
                                                throws TransactionException,
                                                       E extends Exception

Provides the transaction support for the JDBC executions of the template.

Parameters:

callable - the SQL query execution method call.

Returns:

result set of domain objects of required type.

Throws:

TransactionException

E extends Exception

executeQuery

public <T> List<T> executeQuery(String query,
                                RowMapper<T> rowMapper)
                         throws DataAccessException

Executes a query on JDBC and return the result as a list of domain objects.

Parameters:

query - the SQL query with the parameter placeholders.

rowMapper - Row mapper functional interface.

Returns:

List of domain objects of required type.

Throws:

DataAccessException

See Also:

executeQuery(String, RowMapper, QueryFilter)

executeQuery

public <T> List<T> executeQuery(String query,
                                RowMapper<T> rowMapper,
                                QueryFilter queryFilter)
                         throws DataAccessException

Executes a query on JDBC and return the result as a list of domain objects.

Parameters:

query - the SQL query with the parameter placeholders.

rowMapper - Row mapper functional interface.

queryFilter - parameters for the SQL query parameter replacement.

Returns:

List of domain objects of required type.

Throws:

DataAccessException

fetchSingleRecord

public <T> T fetchSingleRecord(String query,
                               RowMapper<T> rowMapper,
                               QueryFilter queryFilter)
                        throws DataAccessException

Executes a query on JDBC and return the result as a domain object.

Parameters:

query - the SQL query with the parameter placeholders.

rowMapper - Row mapper functional interface.

queryFilter - parameters for the SQL query parameter replacement.

Returns:

domain object of required type.

Throws:

DataAccessException

executeUpdate

public void executeUpdate(String query,
                          QueryFilter queryFilter)
                   throws DataAccessException

Executes the jdbc update query and returns nothing.

Parameters:

query - SQL query with the parameter placeholders.

queryFilter - parameters for the SQL query parameter replacement.

Throws:

DataAccessException

executeUpdate

public int executeUpdate(String query)
                  throws DataAccessException

Executes the jdbc update query and returns the result as updated id integer.

Parameters:

query - the SQL query with the parameter placeholders.

Returns:

the updated id.

Throws:

DataAccessException

executeInsert

public <T> int executeInsert(String query,
                             QueryFilter queryFilter,
                             T bean,
                             boolean fetchInsertedId)
                      throws DataAccessException

Executes the jdbc insert/update query.

Type Parameters:

T - return type of the object.

Parameters:

query - The SQL for insert/update.

queryFilter - Query filter to prepared statement parameter binding.

bean - the Domain object to be inserted/updated.

Throws:

DataAccessException

executeInsert

public <T> int executeInsert(String query,
                             QueryFilter queryFilter,
                             T bean,
                             boolean fetchInsertedId,
                             String autoGenerateIdColumnName)
                      throws DataAccessException

Executes the jdbc insert/update query depends on provided auto generated column name.

Type Parameters:

T - Return type of the object.

Parameters:

query - The SQL for insert/update.

queryFilter - Query filter to prepared statement parameter binding.

bean - The Domain object to be inserted/updated.

fetchInsertedId - Fetch inserted ID.

autoGenerateIdColumnName - Name of auto generate ID column.

Returns:

Throws:

DataAccessException

executeBatchInsert

public <T> int executeBatchInsert(String query,
                                  QueryFilter queryFilter,
                                  T bean)
                           throws DataAccessException

Executes the jdbc insert/update query.

Parameters:

query - The SQL for insert/update.

queryFilter - Query filter to prepared statement parameter binding.

bean - the Domain object to be inserted/updated.

Throws:

DataAccessException

executeBatchDelete

public <T> int executeBatchDelete(String query,
                                  QueryFilter queryFilter)
                           throws DataAccessException

Executes the jdbc batch delete query.

Parameters:

query - The SQL for delete

queryFilter - Query filter to prepared statement parameter binding.

Throws:

DataAccessException

getDriverName

public String getDriverName()
                     throws DataAccessException

Returns:

the driver name of the connection provided by the datasource.

Throws:

DataAccessException

getDatabaseProductName

public String getDatabaseProductName()
                              throws DataAccessException

Retrieve database product name from the data source.

Returns:

database product name from the data source.

Throws:

DataAccessException - if an error occurs while retrieving metadata from data source.