Description Igor Mukhin 2010-10-21 11:13:37 EDT

Build Identifier: 2.1.0

@Entity
public class Person {
	public enum Enum1 { VALUE1, VALUE2 }

	@Id
	private int id;

	@ElementCollection
	private Map<String, Integer> str2int = new Hashtable<String, Integer>();

	@ElementCollection
	private Map<String, Enum1> str2enum = new Hashtable<String, Enum1>();
}

Next query will work (because no converter needed for Integer):
TypedQuery<Person> q = em.createQuery("select p from Person p JOIN p.str2int me where key(me) = ?1", Person.class);
q.setParameter(1, "test");
List<Person> persons = q.getResultList();


This query will fail (because EL will incorrectly use the value converter (enum) for the key (string)):
TypedQuery<Person> q = em.createQuery("select p from Person p JOIN p.str2enum me where key(me) = ?1", Person.class);
q.setParameter(1, "test");
List<Person> persons = q.getResultList();

Exception: 
Exception in thread "main" java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Enum
	at org.eclipse.persistence.mappings.converters.EnumTypeConverter.convertObjectValueToDataValue(EnumTypeConverter.java:137)
	at org.eclipse.persistence.mappings.DirectCollectionMapping.getFieldValue(DirectCollectionMapping.java:2132)
	at org.eclipse.persistence.internal.expressions.QueryKeyExpression.getFieldValue(QueryKeyExpression.java:374)
	at org.eclipse.persistence.internal.expressions.ParameterExpression.getValue(ParameterExpression.java:256)


Possible solution: the converter for the key-type should be used with KEY() function.

Thanks.

Reproducible: Always

Steps to Reproduce:
see description