de.minee.jpa

Class SelectStatement<T>

java.lang.Object

de.minee.jpa.AbstractQuery

de.minee.jpa.AbstractStatement<T>

de.minee.jpa.SelectStatement<T>

public class SelectStatement<T>
extends AbstractStatement<T>

Constructor Summary

Constructors

Constructor and Description
SelectStatement(Class<T> cls, Connection connection) Creates a new Select Statement for table cls

Method Summary

Modifier and Type	Method and Description
protected T	byId(UUID id, Map<Object,Object> handledObjects) Selects an Object directly by its Id or returns a cached Object of the current session.
List<T>	execute() Executes the Query.
List<T>	execute(Collection<?> args) Executes a prepared statement by handing over the query arguments.
protected static <S> AbstractStatement<S>	select(Class<S> clazz, Connection connection)

Methods inherited from class de.minee.jpa.AbstractStatement

add, add, and, assembleFullSelectQuery, assembleQuery, byId, getType, or, query, toString

Methods inherited from class de.minee.jpa.AbstractQuery

executeQuery, executeQuery, getConnection

Methods inherited from class java.lang.Object

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

Constructor Detail

SelectStatement

public SelectStatement(Class<T> cls,
                       Connection connection)

Creates a new Select Statement for table cls

Parameters:

cls - Class representing a database table

connection - Database connection

Method Detail

select

protected static <S> AbstractStatement<S> select(Class<S> clazz,
                                                 Connection connection)

execute

public List<T> execute(Collection<?> args)

Executes a prepared statement by handing over the query arguments.

Specified by:

execute in class AbstractStatement<T>

Parameters:

args - Arguments for the prepared statement

Returns:

A list of the found database entries @ SQLException in case of an error

execute

public List<T> execute()

Executes the Query.

Specified by:

execute in class AbstractStatement<T>

Returns:

A list of the found database entries @ SQLException in case of an error

byId

protected T byId(UUID id,
                 Map<Object,Object> handledObjects)

Description copied from class: AbstractStatement

Selects an Object directly by its Id or returns a cached Object of the current session. The cache improves performance, ensures object references and avoids endless cycles.

Specified by:

byId in class AbstractStatement<T>

Parameters:

id - Id of the entry

handledObjects - Object cache of fetched entries in the same session

Returns:

Object with Id id or null if no entry can be found @ SQLException in case of an error