Hibernate version: 3.2
Hibernate-annotations: 3.3.1.GA
I get a
SerializationException when I try to access a Map collection whose key is an
enum persisted as the enum STRING.
I have a
regions table, each region having its ID; for instance, USA is 1. I also have a
regions_l table (linked by foreign key) containing the localized name of each country in all possible languages; in the case of the USA, this localized
regions_l table would contain this:
Code:
regions_l
id | lang | name
----+------+-----------------------------------
1 | 'en' | 'United States of America'
1 | 'fr' | 'Etats-Unis d'Amérique'
1 | 'de' | 'Vereinigten Staaten von Amerika'
As you can see, the
lang field is stored as a two-character String.
Here is the relevant bits of the corresponding annotated
Region object:
Code:
public enum Language {
en, fr, de;
}
@Entity @Table(name="regions")
public class Region implements java.io.Serializable {
private static final long serialVersionUID = -7244316928277518004L;
private int id;
private Map<Language, String> regionL = new EnumMap<Language,String>();
@Id
public int getId() { return this.id; }
public void setId(Integer id) { this.id = id; }
@CollectionOfElements @JoinTable(name="regions_l", joinColumns={@JoinColumn(name="region")})
@org.hibernate.annotations.MapKey(columns={@Column(name="lang")}) @Column(name="name")
public Map<Language, String> getRegionL() { return this.regionL; }
public void setRegionL(Map<Language, String> regionL) { this.regionL = regionL; }
@Transient
public String getName(Language lang) {
return regionL.get(lang);
}
}
I would dearly like to annotate that the MapKey is to be interpreted as an enum-string:
@Enumerated(EnumType.STRING), but I don't know where to fit that annotation in this particular context!!!
Instead, if I simply call
Code:
getName(Language.en)
I get the following exception:
Code:
org.hibernate.type.SerializationException: could not deserialize
org.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:217)
org.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:240)
org.hibernate.type.SerializableType.fromBytes(SerializableType.java:82)
org.hibernate.type.SerializableType.get(SerializableType.java:39)
org.hibernate.type.NullableType.nullSafeGet(NullableType.java:163)
org.hibernate.type.NullableType.nullSafeGet(NullableType.java:154)
org.hibernate.persister.collection.AbstractCollectionPersister.readIndex(AbstractCollectionPersister.java:708)
org.hibernate.collection.PersistentMap.readFrom(PersistentMap.java:258)
org.hibernate.loader.Loader.readCollectionElement(Loader.java:1008)
org.hibernate.loader.Loader.readCollectionElements(Loader.java:646)
org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:591)
org.hibernate.loader.Loader.doQuery(Loader.java:701)
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
org.hibernate.loader.Loader.loadCollection(Loader.java:1994)
org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:36)
org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:565)
org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:63)
org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1716)
org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:344)
org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)
org.hibernate.collection.AbstractPersistentCollection.readElementByIndex(AbstractPersistentCollection.java:161)
org.hibernate.collection.PersistentMap.get(PersistentMap.java:146)
com.mywebsite.Region.getName(Region.java:92)
...
Caused by: java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2279)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2748)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:781)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:280)
at org.hibernate.util.SerializationHelper$CustomObjectInputStream.<init>(SerializationHelper.java:252)
at org.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:209)
... 76 more
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