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Hibernate version:3.1.3

Mapping documents:

Code between sessionFactory.openSession() and session.close():

Full stack trace of any exception that occurs:
java.lang.StringIndexOutOfBoundsException: String index out of range: 0
at java.lang.String.charAt(String.java:558)
at org.hibernate.type.CharacterType.get(CharacterType.java:29)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:113)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:102)
at org.hibernate.type.AbstractType.hydrate(AbstractType.java:81)
at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:1899)
at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1372)
at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1300)
at org.hibernate.loader.Loader.getRow(Loader.java:1197)
at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:569)
at org.hibernate.loader.Loader.doQuery(Loader.java:689)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
at org.hibernate.loader.Loader.doList(Loader.java:2145)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029)
at org.hibernate.loader.Loader.list(Loader.java:2024)
at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1552)
at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
at BancaDB.getElContiBXBil(BancaDB.java:79)
at Lancia.main(Lancia.java:17)
Causa ...
Exception in thread "main" java.lang.NullPointerException
at Lancia.main(Lancia.java:29)


Name and version of the database you are using:MySQL 5.0

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:
I understand the problem: there are a field mapped as character. This field in DB is void. Not null. String "". The code
public Object get(ResultSet rs, String name) throws SQLException {
String str = rs.getString(name);
if (str==null) {
return null;
}
else {
return new Character( str.charAt(0) );
}
}
in class CharacterType, attempt to retrieve char from string with 0 length.