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 Post subject: IllegalArgumentException with many-to-one property
PostPosted: Wed Apr 04, 2012 7:57 am 
Newbie

Joined: Thu Aug 25, 2011 4:52 am
Posts: 5
Hi,

I get an IllegalArgumentException calling the getter or setter method with the following <many-to-one> relationship property:

Code:
<class name="PickList">
    <many-to-one name="collectionPickList"
                 access="property"
                 class="CollectionPickList"
                 column="ID_EMPFAENGER"
                 property-ref="shipmentId"/>
</class>


The class PickList contains the following methods:

Code:
class PickList {
   ...
   public CollectionPickList getCollectionPickList() {...}
   public boolean isCollectionPickList() {...}
   public void setCollectionPickList(CollectionPickList collectionPickList) {...}
}


When I try to save an instance of PickList, I get the following errors:

IllegalArgumentException occurred while calling setter of com.rhenus.rml.businessclasses.warehouse.helas.PickList.collectionPickList
Caused by: java.lang.IllegalArgumentException: argument type mismatch

When I try to select an instance of PickList I get the following error messages:

org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of com.rhenus.rml.businessclasses.warehouse.helas.BasePickList.shipmentId
Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class

The problem here is, that Hibernate assumes the property "collectionPickList" to be of type "java.lang.Boolean" because of the method "isCollectionPickList()". When I change the access of the <many-to-one> property to "field" it works:

Code:
<class name="PickList">
    <many-to-one name="collectionPickList"
                 access="field"
                 class="CollectionPickList"
                 column="ID_EMPFAENGER"
                 property-ref="shipmentId"/>
</class>


Hibernate obviousely doesn't take the "class" property into account in this case. This may be considered as a bug!

Best regards

Thomas


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