Cannot delete instance with a map

[manuelvio]

When I try to delete an instance with a map in it I get this exception:

|  java.lang.ClassCastException: java.util.HashMap cannot be cast to net.kaleidos.hibernate.postgresql.hstore.HstoreDomainType
        at net.kaleidos.hibernate.usertype.HstoreType.deepCopy(HstoreType.java:56)
        at org.hibernate.type.CustomType.deepCopy(CustomType.java:173)
        at org.hibernate.type.TypeHelper.deepCopy(TypeHelper.java:68)
        at org.hibernate.event.def.DefaultDeleteEventListener.createDeletedState(DefaultDeleteEventListener.java:301)
        at org.hibernate.event.def.DefaultDeleteEventListener.deleteEntity(DefaultDeleteEventListener.java:252)
        at org.hibernate.event.def.DefaultDeleteEventListener.onDelete(DefaultDeleteEventListener.java:162)
        at org.hibernate.event.def.DefaultDeleteEventListener.onDelete(DefaultDeleteEventListener.java:73)
        at org.hibernate.impl.SessionImpl.fireDelete(SessionImpl.java:956)
        at org.hibernate.impl.SessionImpl.delete(SessionImpl.java:934)
        at org.codehaus.groovy.grails.orm.hibernate.HibernateGormInstanceApi.delete_closure3(HibernateGormEnhancer.groovy:933)
        at groovy.lang.Closure.call(Closure.java:415)
        at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:406)
        at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:339)
        at org.codehaus.groovy.grails.orm.hibernate.HibernateGormInstanceApi.delete(HibernateGormEnhancer.groovy:932)
        at net.kaleidos.hibernate.hstore.PostgresqlHstoreDomainIntegrationSpec.save and delete a domain class with a map. key: #data(PostgresqlHstoreDomainIntegrationSpec.groovy:80)

I've added this integration test (which fails) in PostgresqlHstoreDomainIntegrationSpec.groovy:

    @Unroll
    void 'save and delete a domain class with a map. key: #data'() {
        setup:
            def testHstore = new TestHstore(testAttributes: data)
        when: 'I save an instance'
            testHstore.save(flush: true)
        and: 'I try to delete it'
            testHstore.delete(flush: true)

        then: 'It shouldn\'t be present in database anymore'
            TestHstore.count() == 0

        where:
            data                  | attribute | value
            [foo:"bar"]           | "foo"     | "bar"
            ["foo,bar":"baz,qux"] | "foo,bar" | "baz,qux"
    }

[ilopmar]

Merged and published in version 0.6.5