Package com.vaadin.hilla.crud

Class JpaFilterConverter

java.lang.Object

com.vaadin.hilla.crud.JpaFilterConverter

@Component
public class JpaFilterConverter
extends Object

Utility class for converting Hilla Filter specifications into JPA filter specifications. This class can be used to implement filtering for custom ListService or CrudService implementations that use JPA as the data source.

This class requires an EntityManager to be available as a Spring bean and thus should be injected into the bean that wants to use the converter. Manually creating new instances of this class will not work.

Constructor Summary

Constructors

Constructor	Description
JpaFilterConverter()

Method Summary

Modifier and Type	Method	Description
<T> org.springframework.data.jpa.domain.Specification<T>	toSpec(Filter rawFilter, Class<T> entity)	Converts the given Hilla filter specification into a JPA filter specification for the specified entity class.

Methods inherited from class java.lang.Object

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

Constructor Details

JpaFilterConverter

public JpaFilterConverter()

Method Details

toSpec

public <T>
org.springframework.data.jpa.domain.Specification<T> toSpec(Filter rawFilter,
 Class<T> entity)

Converts the given Hilla filter specification into a JPA filter specification for the specified entity class.

If the filter contains PropertyStringFilter instances, their properties, or nested property paths, need to match the structure of the entity class. Likewise, their filter values should be in a format that can be parsed into the type that the property is of.

Type Parameters:

T - the type of the entity

Parameters:

rawFilter - the filter to convert

entity - the entity class

Returns:

a JPA filter specification for the given filter