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DATACMNS-1059 - Alter QuerydslPredicateExecutor.findOne(…) to return Optional<T>.

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We now return Optional<T> for QuerydslPredicateExecutor.findOne(Predicate) aligning the return type to the ones used in CrudRepository.

Original pull request: #215.
This commit is contained in:
Christoph Strobl
2017-05-05 17:45:01 +02:00
committed by Oliver Gierke
parent 0e36b43752
commit 8c028c3115
1 changed files with 8 additions and 5 deletions
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13
src/main/java/org/springframework/data/querydsl/QuerydslPredicateExecutor.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2011-2015 the original author or authors.
* Copyright 2011-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -15,6 +15,8 @@
*/
package org.springframework.data.querydsl;
import java.util.Optional;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
@@ -27,18 +29,19 @@ import com.querydsl.core.types.Predicate;
*
* @author Oliver Gierke
* @author Thomas Darimont
* @author Christoph Strobl
*/
public interface QuerydslPredicateExecutor<T> {
/**
* Returns a single entity matching the given {@link Predicate} or {@literal null} if none was found.
*
* Returns a single entity matching the given {@link Predicate} or {@link Optional#empty()} if none was found.
*
* @param predicate can be {@literal null}.
* @return a single entity matching the given {@link Predicate} or {@literal null} if none was found.
* @return a single entity matching the given {@link Predicate} or {@link Optional#empty()} if none was found.
* @throws org.springframework.dao.IncorrectResultSizeDataAccessException if the predicate yields more than one
* result.
*/
T findOne(Predicate predicate);
Optional<T> findOne(Predicate predicate);
/**
* Returns all entities matching the given {@link Predicate}. In case no match could be found an empty