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POHibernate expecting wrong parameter type in HQL
 

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  1. POHibernate expecting wrong parameter type in HQL
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    <p>We have an hierarchy of entities, e.g. abstract Basket and two concrete, which in turn can contain a list of some other items, for example, with exact same hierarchy(SaleBasketItem, ReturnBasketItem). </p> <pre><code>@Entity @XStreamAlias("basket") @DiscriminatorColumn(name = "basket_type") @DiscriminatorOptions(force = true) @Inheritance(strategy = InheritanceType.SINGLE_TABLE) public abstract class Basket&lt;T extends BasketItem&gt; @Entity @DiscriminatorValue(value = "SALE") public class SaleBasket extends Basket&lt;SaleBasketItem&gt; @Entity @DiscriminatorValue(value = "RETURN") public class ReturnBasket extends Basket&lt;ReturnBasketItem&gt; @Entity @Table(name = "basket_item") @XStreamAlias("basket_str") @DiscriminatorColumn(name = "basket_item_type") @DiscriminatorOptions(force = true) @Inheritance(strategy = InheritanceType.SINGLE_TABLE) public abstract class BasketItem&lt;U extends BasketItem, V extends Basket&gt; @Entity @DiscriminatorValue(value = "RETURN") public class ReturnBasketItem extends BasketItem&lt;ReturnBasketItem, ReturnBasket&gt; @Entity @DiscriminatorValue(value = "SALE") public class SaleBasketItem extends BasketItem&lt;SaleBasketItem, SaleBasket&gt; </code></pre> <p>So, the problem arises when I try to execute hql query like</p> <pre><code>"SELECT bi FROM " + basketType + "BasketItem bi JOIN bi.basket b JOIN b.saleSession JOIN bi.ware w WHERE b.state = :state" </code></pre> <p>where <code>basketType</code> is dynamically either "Sale" or "Return". Then I put that query in <code>TypedQuery</code> with type of <code>BasketItem</code> I need and try to <code>setParameter("state", state)</code>, where <code>state</code> is some enum representing state of concrete basket (different in each concrete class, not present in abstract class at all), which throws</p> <blockquote> <p>IllegalArgumentException(java.lang.IllegalArgumentException: Parameter value ... was not matching type)</p> </blockquote> <p>where type is <code>ReturnBasketState</code> when actual is <code>SaleBasket</code> state, or vice versa.</p> <p>So the question is - how to force Hibernate to expect correct type for that parameter?</p>
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    1. CODo you pass the enum as parameter? Or a String representation of that enum value?
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    2. COI passed Enum as param
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