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DATACMNS-1058 - Alter QueryByExampleExecutor.findOne to return Optional<S>.

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We now return Optional<S> for findOne() just as we do in CrudRepository.

Original pull request: #214.
This commit is contained in:
Christoph Strobl
2017-05-05 14:28:56 +02:00
committed by Mark Paluch
parent 5d08bd6273
commit 0ff53bd5db
1 changed files with 6 additions and 3 deletions
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9
src/main/java/org/springframework/data/repository/query/QueryByExampleExecutor.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2016 the original author or authors.
* Copyright 2016-2017 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.repository.query;
import java.util.Optional;
import org.springframework.data.domain.Example;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
@@ -25,6 +27,7 @@ import org.springframework.data.domain.Sort;
*
* @param <T>
* @author Mark Paluch
* @author Christoph Strobl
* @since 1.12
*/
public interface QueryByExampleExecutor<T> {
@@ -33,10 +36,10 @@ public interface QueryByExampleExecutor<T> {
* Returns a single entity matching the given {@link Example} or {@literal null} if none was found.
*
* @param example can be {@literal null}.
* @return a single entity matching the given {@link Example} or {@literal null} if none was found.
* @return a single entity matching the given {@link Example} or {@link Optional#empty()} if none was found.
* @throws org.springframework.dao.IncorrectResultSizeDataAccessException if the Example yields more than one result.
*/
<S extends T> S findOne(Example<S> example);
<S extends T> Optional<S> findOne(Example<S> example);
/**
* Returns all entities matching the given {@link Example}. In case no match could be found an empty {@link Iterable}