com.holonplatform.datastore.jpa.jpql

Interface JPQLResultConverter<Q,R>

Type Parameters:

Q - Query result type

R - Expected result type

public interface JPQLResultConverter<Q,R>

Jpa query result converter.

Since:

5.0.0

Method Summary

Modifier and Type	Method and Description
R	convert(JpaExecutionContext context, Q result) Convert a query result into expected result type.
Class<? extends R>	getConversionType() Get the type into which this converter is able to convert a result.
Class<? extends Q>	getQueryResultType() Get the query result type.
static <T> JPQLResultConverter<T,T>	identity(Class<? extends T> type) Create a JPQLResultConverter which does not perform any result conversion.

Method Detail

getQueryResultType

Class<? extends Q> getQueryResultType()

Get the query result type.

Returns:

The query result type

getConversionType

Class<? extends R> getConversionType()

Get the type into which this converter is able to convert a result.

Returns:

The conversion type

convert

R convert(JpaExecutionContext context,
          Q result)
   throws com.holonplatform.core.exceptions.DataAccessException

Convert a query result into expected result type.

Parameters:

context - Execution context

result - Result to convert

Returns:

Converted result

Throws:

com.holonplatform.core.exceptions.DataAccessException - If the conversion failed

identity

static <T> JPQLResultConverter<T,T> identity(Class<? extends T> type)

Create a JPQLResultConverter which does not perform any result conversion.

Type Parameters:

T - Query result type

Parameters:

type - Query result type (not null)

Returns:

A new identity JPQLResultConverter