org.qi4j.library.sql.datasource
Class Databases

java.lang.Object
  org.qi4j.library.sql.datasource.Databases

public class Databases
extends Object

Utility methods for performing SQL calls. Wraps a given DataSource.

Nested Class Summary

static interface	Databases.ResultSetVisitor Visitor for the ResultSet.
static interface	Databases.StatementVisitor Visitor for PreparedStatements.

Constructor Summary

Databases(DataSource source)
Create a new Databases wrapper for a given DataSource

Method Summary

Input<ResultSet,SQLException>	query(String sql) Perform SQL query and provide results as an Input.
void	query(String sql, Databases.ResultSetVisitor visitor) Perform SQL query and let visitor handle results.
Input<ResultSet,SQLException>	query(String sql, Databases.StatementVisitor visitor) Perform SQL query and provide results as an Input.
void	query(String sql, Databases.StatementVisitor statement, Databases.ResultSetVisitor resultsetVisitor) Perform SQL query and let visitor handle results.
int	update(String sql) Perform SQL update statement
int	update(String sql, Databases.StatementVisitor visitor) Perform SQL update statement.

Methods inherited from class java.lang.Object

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

Constructor Detail

Databases

public Databases(DataSource source)

Create a new Databases wrapper for a given DataSource

Parameters:

source -

Method Detail

update

public int update(String sql)
           throws SQLException

Perform SQL update statement

Parameters:

sql -

Returns:

Throws:

SQLException

update

public int update(String sql,
                  Databases.StatementVisitor visitor)
           throws SQLException

Perform SQL update statement. If the SQL string contains ? placeholders, use the StatementVisitor to update the PreparedStatement with actual values.

Parameters:

sql -

visitor -

Returns:

Throws:

SQLException

query

public void query(String sql,
                  Databases.ResultSetVisitor visitor)
           throws SQLException

Perform SQL query and let visitor handle results.

Parameters:

sql -

visitor -

Throws:

SQLException

query

public void query(String sql,
                  Databases.StatementVisitor statement,
                  Databases.ResultSetVisitor resultsetVisitor)
           throws SQLException

Perform SQL query and let visitor handle results. If the SQL string contains ? placeholders, use the StatementVisitor to update the PreparedStatement with actual values.

Parameters:

sql -

statement -

resultsetVisitor -

Throws:

SQLException

query

public Input<ResultSet,SQLException> query(String sql)

Perform SQL query and provide results as an Input. This makes it possible to combine SQL data with the I/O API.

Parameters:

sql -

Returns:

query

public Input<ResultSet,SQLException> query(String sql,
                                           Databases.StatementVisitor visitor)

Perform SQL query and provide results as an Input. This makes it possible to combine SQL data with the I/O API. If the SQL string contains ? placeholders, use the StatementVisitor to update the PreparedStatement with actual values.

Parameters:

sql -

Returns: