Hibernate search 4.5 Alpha 1 Unable to guess FieldBridge for id in java.lang.Byte

Question

I have a problem on deploying an EAR project to Wildfly 8 beta1. The project uses Hibernate Search 4.5 Alpha 1. There are indexed some entities. The project builds fine but when it is deployed an exception is thrown: Unable to guess FieldBridge for id in java.lang.Byte. I try to disable all hibernate search annotations but the exception still appear. Seams to be a bug. Any suggestions?

at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:169) [wildfly-jpa-8.0.0.Beta1.jar:8.0.0.Beta1]
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:117) [wildfly-jpa-8.0.0.Beta1.jar:8.0.0.Beta1]
at java.security.AccessController.doPrivileged(Native Method) [rt.jar:1.7.0_25]
at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:463) [wildfly-security-manager-1.0.0.Beta3.jar:1.0.0.Beta3]
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:178) [wildfly-jpa-8.0.0.Beta1.jar:8.0.0.Beta1]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [rt.jar:1.7.0_25]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [rt.jar:1.7.0_25]
at java.lang.Thread.run(Unknown Source) [rt.jar:1.7.0_25]
at org.jboss.threads.JBossThread.run(JBossThread.java:122) [jboss-threads-2.1.1.Final.jar:2.1.1.Final]
Caused by: org.hibernate.search.SearchException: HSEARCH000135: Unable to guess FieldBridge for id in java.lang.Byte
at org.hibernate.search.bridge.impl.BridgeFactory.guessType(BridgeFactory.java:432)
at org.hibernate.search.engine.metadata.impl.AnnotationMetadataProvider.checkDocumentId(AnnotationMetadataProvider.java:159)
at org.hibernate.search.engine.metadata.impl.AnnotationMetadataProvider.initializeMemberLevelAnnotations(AnnotationMetadataProvider.java:625)
at org.hibernate.search.engine.metadata.impl.AnnotationMetadataProvider.initializeClass(AnnotationMetadataProvider.java:324)
at org.hibernate.search.engine.metadata.impl.AnnotationMetadataProvider.getTypeMetadataFor(AnnotationMetadataProvider.java:118)
at org.hibernate.search.engine.spi.AbstractDocumentBuilder.<init>(AbstractDocumentBuilder.java:100)
at org.hibernate.search.engine.spi.DocumentBuilderContainedEntity.<init>(DocumentBuilderContainedEntity.java:62)
at org.hibernate.search.spi.SearchFactoryBuilder.initDocumentBuilders(SearchFactoryBuilder.java:342)
at org.hibernate.search.spi.SearchFactoryBuilder.buildNewSearchFactory(SearchFactoryBuilder.java:217)
at org.hibernate.search.spi.SearchFactoryBuilder.buildSearchFactory(SearchFactoryBuilder.java:141)
at org.hibernate.search.hcore.impl.HibernateSearchSessionFactoryObserver.sessionFactoryCreated(HibernateSearchSessionFactoryObserver.java:74)
at org.hibernate.internal.SessionFactoryObserverChain.sessionFactoryCreated(SessionFactoryObserverChain.java:52)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:581)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1837)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:854)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:847)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:396)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:846)
at org.jboss.as.jpa.hibernate4.TwoPhaseBootstrapImpl.build(TwoPhaseBootstrapImpl.java:44)
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:151) [wildfly-jpa-8.0.0.Beta1.jar:8.0.0.Beta1]
... 8 more

This is an example of entity that reproduces the exception:

@Entity
@Table(name = "flow")
public class Flow implements java.io.Serializable {

private static final long serialVersionUID = 3556704047257784867L;
private Byte id;
private String name;
private String description;

public Flow() {
}

public Flow(String name) {
    this.name = name;
}

public Flow(String name, String description) {
    this.name = name;
    this.description = description;
}

@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "id", unique = true, nullable = false)
public Byte getId() {
    return this.id;
}

public void setId(Byte id) {
    this.id = id;
}

@Column(name = "name", nullable = false, length = 60)
@NotNull
@Length(max = 60)
public String getName() {
    return this.name;
}

public void setName(String name) {
    this.name = name;
}

@Column(name = "description", length = 400)
@Length(max = 400)
public String getDescription() {
    return this.description;
}

public void setDescription(String description) {
    this.description = description;
}

}

If the id is changed from Byte to Short is working fine. There is no builtin bridge for Byte. Maybe this is related, but the main problem is why hibernate search is looking for bridge if I don't have hibernate search annotations?

Answer 1

A quick workaround - can be created a ByteBridge:

public class ByteBridge extends NumberBridge implements Serializable {
public Object stringToObject(String stringValue) {
    if ( StringHelper.isEmpty( stringValue ) ) return null;
    return Byte.valueOf( stringValue );
}
} 

And then add annotation to entity:

@FieldBridge(impl=....)

Answer 2

I tried the custom FieldBridge route, but turns out Hibernate Search converts the byte field to Integer object before feeding to FieldBridge. This means just adding the normal IntegerBridge works around the issue:

@FieldBridge(impl = IntegerBridge.class)