Package net.kaczmarzyk.spring.data.jpa.domain

Class EmptyResultOnTypeMismatch<T>

java.lang.Object

net.kaczmarzyk.spring.data.jpa.domain.EmptyResultOnTypeMismatch<T>

All Implemented Interfaces:

Serializable, org.springframework.data.jpa.domain.Specification<T>

Direct Known Subclasses:

IgnoreOnTypeMismatch

public class EmptyResultOnTypeMismatch<T>
extends Object
implements org.springframework.data.jpa.domain.Specification<T>

Wrapper that turns a Specification into a one that always produces in an empty result (i.e. where 0 = 1) in case of a type mismatch (e.g. when type on path is Long and the value from the HTTP parameter is not a numeric.

It's useful for polymorphic "OR" queries such as where id = ? or name = ?. A spec will be wrapped with this decorator if onTypeMismatch property of @Spec is explicitly set to OnTypeMismatch.EMPTY_RESULT, i.e.: @Spec(path="id", onTypeMismatch=EMPTY_RESULT).

Author:

Tomasz Kaczmarzyk

See Also:

• OnTypeMismatch
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
EmptyResultOnTypeMismatch(org.springframework.data.jpa.domain.Specification<T> wrappedSpec)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
org.springframework.data.jpa.domain.Specification<T>	getWrappedSpec()
int	hashCode()
jakarta.persistence.criteria.Predicate	toPredicate(jakarta.persistence.criteria.Root<T> root, jakarta.persistence.criteria.CriteriaQuery<?> query, jakarta.persistence.criteria.CriteriaBuilder cb)
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.springframework.data.jpa.domain.Specification

and, or

Constructor Details

EmptyResultOnTypeMismatch

public EmptyResultOnTypeMismatch(org.springframework.data.jpa.domain.Specification<T> wrappedSpec)

Method Details

toPredicate

public jakarta.persistence.criteria.Predicate toPredicate(jakarta.persistence.criteria.Root<T> root,
 jakarta.persistence.criteria.CriteriaQuery<?> query,
 jakarta.persistence.criteria.CriteriaBuilder cb)

Specified by:

toPredicate in interface org.springframework.data.jpa.domain.Specification<T>

getWrappedSpec

public org.springframework.data.jpa.domain.Specification<T> getWrappedSpec()

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object