com.jcabi.jdbc

Interface Outcome<T>

Type Parameters:

T - Type of expected result

All Known Implementing Classes:

SingleOutcome

public interface Outcome<T>

Outcome of ResultSet.

The following convenience implementations are provided:

• NOT_EMPTY to check that at least one result row is returned.
• VOID for when you wish to disregard the result.
• UPDATE_COUNT to check the number of updated rows.

Since:

0.12

Version:

$Id$

Author:

Carlos Miranda (miranda.cma@gmail.com)

Field Summary

Fields

Modifier and Type	Field and Description
static Outcome<Boolean>	NOT_EMPTY Returns TRUE if at least one SQL record found in ResultSet.
static Outcome<Integer>	UPDATE_COUNT Outcome that returns the number of updated rows.
static Outcome<Void>	VOID Outcome that does nothing (and always returns null).

Method Summary

Methods

Modifier and Type	Method and Description
T	handle(ResultSet rset, Statement stmt) Process the result set and return some value.

Field Detail

NOT_EMPTY

static final Outcome<Boolean> NOT_EMPTY

Returns TRUE if at least one SQL record found in ResultSet.

The outcome returns the value of ResultSet.next() and throws SQLException in case of a problem.

Since:

0.12

VOID

static final Outcome<Void> VOID

Outcome that does nothing (and always returns null).

Useful when you're not interested in the result:

 new JdbcSession(source)
   .sql("INSERT INTO foo (name) VALUES (?)")
   .set("Jeff Lebowski")
   .insert(Outcome.VOID);

Since:

0.12

UPDATE_COUNT

static final Outcome<Integer> UPDATE_COUNT

Outcome that returns the number of updated rows.

Use it when you need to determine the number of rows updated:

 Integer count = new JdbcSession(source)
   .sql("UPDATE employee SET salary = 35000 WHERE department = ?")
   .set("Finance")
   .update(UpdateCountOutcome.INSTANCE);

Since:

0.12

Method Detail

handle

T handle(ResultSet rset,
       Statement stmt)
         throws SQLException

Process the result set and return some value.

Parameters:

rset - The result set to process

stmt - The statement used in the run

Returns:

The result

Throws:

SQLException - If something goes wrong inside