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querydsl-collections/src/test/java/com/mysema/query/collections/LeftJoinTest.java
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| /* | ||
| * Copyright 2011, Mysema Ltd | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package com.mysema.query.collections; | ||
|
|
||
| import static com.mysema.query.alias.Alias.$; | ||
| import static com.mysema.query.alias.Alias.alias; | ||
| import static org.junit.Assert.assertEquals; | ||
| import static org.junit.Assert.assertFalse; | ||
|
|
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| import java.util.Arrays; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
|
|
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| import org.junit.Before; | ||
| import org.junit.Test; | ||
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| public class LeftJoinTest extends AbstractQueryTest { | ||
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| private QCat cat, kitten; | ||
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| private List<Cat> cats; | ||
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| @Before | ||
| public void setUp() { | ||
| super.setUp(); | ||
| cat = new QCat("c"); | ||
| kitten = new QCat("k"); | ||
| Cat bob = new Cat("Bob"); | ||
| Cat bob2 = new Cat("Bob"); | ||
| Cat kate = new Cat("Kate"); | ||
| Cat kate2 = new Cat("Kate"); | ||
| Cat franz = new Cat("Franz"); | ||
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| bob.setKittens(Collections.singletonList(bob2)); | ||
| bob.setKittensByName(Collections.singletonMap(bob2.getName(), bob2)); | ||
| kate.setKittens(Collections.<Cat>emptyList()); | ||
| kate.setKittensByName(Collections.singletonMap(kate2.getName(), kate)); | ||
| cats = Arrays.asList(bob, bob2, kate, kate2, franz); | ||
| } | ||
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| @Test | ||
| public void List() { | ||
| List<Cat> rv = CollQueryFactory.from(cat, cats) | ||
| .leftJoin(cat.kittens, kitten) | ||
| .where(kitten.isNotNull(), cat.name.eq(kitten.name)) | ||
| .orderBy(cat.name.asc()) | ||
| .list(cat); | ||
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| assertEquals(1, rv.size()); | ||
| assertEquals("Bob", rv.get(0).getName()); | ||
| } | ||
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| @Test | ||
| public void Alias() { | ||
| Cat cc = alias(Cat.class, "cat1"); | ||
| Cat ck = alias(Cat.class, "cat2"); | ||
| List<Cat> rv = CollQueryFactory.from($(cc), cats) | ||
| .leftJoin($(cc.getKittens()), $(ck)) | ||
| .where($(ck).isNotNull(), $(cc.getName()).eq($(ck.getName()))) | ||
| .list($(cc)); | ||
| assertFalse(rv.isEmpty()); | ||
| } | ||
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| @Test | ||
| public void Map() { | ||
| List<Cat> rv = CollQueryFactory.from(cat, cats) | ||
| .leftJoin(cat.kittensByName, kitten) | ||
| .where(cat.name.eq(kitten.name)) | ||
| .orderBy(cat.name.asc()) | ||
| .list(cat); | ||
| assertEquals("Bob", rv.get(0).getName()); | ||
| assertEquals("Kate", rv.get(1).getName()); | ||
| } | ||
|
|
||
| } |