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DATAJPA-665 - Add QueryDslJpaRepository.exists(…) method wich accepts a Querydsl predicate.

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Introduced QueryDslJpaRepository.exists(Predicate) method to QueryDslJpaRepository.

Related ticket: DATACMNS-636.
Original pull request: #131.
This commit is contained in:
Thomas Darimont
2015-01-23 09:50:34 +01:00
committed by Oliver Gierke
parent e8436d5de7
commit 2a05e5e1c9
2 changed files with 21 additions and 2 deletions
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10
src/main/java/org/springframework/data/jpa/repository/support/QueryDslJpaRepository.java
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2008-2012 the original author or authors.
* Copyright 2008-2015 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.
@@ -46,6 +46,7 @@ import com.mysema.query.types.path.PathBuilder;
* {@link QueryDslPredicateExecutor}.
*
* @author Oliver Gierke
* @author Thomas Darimont
*/
public class QueryDslJpaRepository<T, ID extends Serializable> extends SimpleJpaRepository<T, ID> implements
QueryDslPredicateExecutor<T> {
@@ -142,6 +143,13 @@ public class QueryDslJpaRepository<T, ID extends Serializable> extends SimpleJpa
return createQuery(predicate).count();
}
/* (non-Javadoc)
* @see org.springframework.data.querydsl.QueryDslPredicateExecutor#exists(com.mysema.query.types.Predicate)
*/
public boolean exists(Predicate predicate) {
return createQuery(predicate).exists();
}
/**
* Creates a new {@link JPQLQuery} for the given {@link Predicate}.
*

13
src/test/java/org/springframework/data/jpa/repository/support/QueryDslJpaRepositoryTests.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2008-2014 the original author or authors.
* Copyright 2008-2015 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.
@@ -325,4 +325,15 @@ public class QueryDslJpaRepositoryTests {
assertThat(users, hasSize(3));
assertThat(users, hasItems(dave, carter, oliver));
}
/**
* @see DATAJPA-665
*/
@Test
public void shouldSupportExistsWithPredicate() throws Exception {
assertThat(repository.exists(user.firstname.eq("Dave")), is(true));
assertThat(repository.exists(user.firstname.eq("Unknown")), is(false));
assertThat(repository.exists((Predicate) null), is(true));
}
}