Using Criteria API path.in(...) with ParameterExpression of array fails at binding time --------------------------------------------------------------------------------------- Key: HHH-6325 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6325 Project: Hibernate Core Issue Type: Bug Components: entity-manager Affects Versions: 3.6.5 Reporter: Oliver Gierke Given the following test code snippet: {code} User user = new User("Dave", "Matthews", &quot;foo(a)bar.de&quot;); em.persist(user); em.flush(); CriteriaBuilder builder = em.getCriteriaBuilder(); CriteriaQuery<User> criteria = builder.createQuery(User.class); Root<User> root = criteria.from(User.class); criteria.where(root.get("firstname").in(builder.parameter(String[].class))); TypedQuery<User> query = em.createQuery(criteria); for (ParameterExpression parameter : criteria.getParameters()) { query.setParameter(parameter, new String[] { "Dave", "Carter" }); } List<User> result = query.getResultList(); assertThat(result.isEmpty(), is(false)); {code} I get a... {code} java.lang.IllegalArgumentException: Parameter value [[Ljava.lang.String;@335ad36d] was not matching type [java.lang.String] at org.hibernate.ejb.AbstractQueryImpl.registerParameterBinding(AbstractQueryImpl.java:360) at org.hibernate.ejb.QueryImpl.setParameter(QueryImpl.java:364) at org.hibernate.ejb.QueryImpl.setParameter(QueryImpl.java:317) at org.hibernate.ejb.criteria.CriteriaQueryCompiler$3.setParameter(CriteriaQueryCompiler.java:328) {code} If I am using a {{ParameterExpression}} of type {{Collection}} and bind the parameters via {{Arrays.asList(...)}} it works fine. Although it's generally possible to fall back to the collection based binding I'd rather bind the parameter values as is (as I get them handed from somewhere else) without explicit checking and converting. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira