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POhow to query an embedded entity by using a query builder
 

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  1. POhow to query an embedded entity by using a query builder
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    <p>I've searched quite a time for an answer to this question. Following Codesmell:</p> <pre><code>@Entity public class Person { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) protected Integer id; @Column(nullable = true, length = 50) @Size(max = 50) private String name; @Embedded @Valid protected Adress adress; public void setId(Integer id) { this.id = id; } public Integer getId() { return this.id; } public void setName(String name) { this.name = name; } public void getName() { return this.name; } public void setAdress(Adress adress) { this.adress = adress; } public void getAdress() { return this.adress; } } @Embeddable public class Adress { @Column(nullable = false, length = 50) @Size(max = 50) @NotNull private String place; public void setPlace(String place) { this.place = place; } public void getPlace() { return this.place; } } public class PersonDaoJpa { public List&lt;Ort&gt; findByPerson(final Person person) { CriteriaBuilder builder = this.entityManager.getCriteriaBuilder(); CriteriaQuery&lt;Person&gt; query = builder.createQuery(Person.class); Root&lt;Person&gt; rootPerson = query.from(Person.class); List&lt;Predicate&gt; wherePredicates = new ArrayList&lt;Predicate&gt;(); if (person.getName() != null) { wherePredicates.add( builder.like(builder.lower(rootPerson.&lt;String&gt;get("name")), ort.getName().toLowerCase()) ); } Adresse adresse = ort.getAdresse(); if (adresse != null) { if(adresse.getPlace() != null) { // this won't work wherePredicates.add( builder.like(builder.lower(rootPerson.&lt;String&gt;get("person.adress.place")), adresse.getPlace().toLowerCase()) ); } } Predicate whereClause = builder.and(wherePredicates.toArray(new Predicate[0])); query.where(whereClause); return this.entityManager.createQuery(query).getResultList(); } } </code></pre> <p>How can I access the Adress.place through rootPerson? rootPerson.get("place"), or rootPerson.get("adress.place") won't work...</p>
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