I am trying to map the following object but when I try and merge I get a classCastException because it tries to find the identifier on the list not the element of the list. Any suggestions would be appreciated.
Code:
public class Object1{
Long oid;
String x;
Map<String, List<Object2>> data;
//appropriate getters and setters.
}
public class Object2{
Long oid;
String y;
String z;
//appropriate getters and setters.
}
Tried to map the map using:
<class name="Object1"
table="OBJECT1"
dynamic-update="true"
schema="model"
>
<id
name="OID"
type="java.lang.Long"
column="OID">
<generator class="IDGenerator"/>
</id>
<property name="x"
column="X"
type="java.lang.String"/>
<map name="data" table="DATA" >
<key column="DATA_OID"/>
<map-key type="java.lang.String" column="KEY"/>
<many-to-many class="Object2"/>
</map>
</class>
<class name="Object2"
table="OBJECT2"
dynamic-update="true"
schema="model"
>
<id
name="oid"
type="java.lang.Long"
column="OID">
<generator class="IDGenerator"/>
</id>
<property name="y"
column="Y"
type="java.lang.String"/>
<property name="z"
column="Z">
<type name="java.lang.String"/>
</property>
</class>
Exception I currently see when trying to merge:
Caused by: org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter o
f minestar.platform.persistence.AbstractPersistentComponent.OID
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:1
71)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.getIdentifier(AbstractEntityTuplizer.ja
va:183)
at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersis
ter.java:3596)
at org.hibernate.persister.entity.AbstractEntityPersister.isTransient(AbstractEntityPersiste
r.java:3312)
at org.hibernate.engine.ForeignKeys.isTransient(ForeignKeys.java:181)
at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:218)
at org.hibernate.type.EntityType.getIdentifier(EntityType.java:397)
at org.hibernate.type.EntityType.replace(EntityType.java:253)
at org.hibernate.type.MapType.replaceElements(MapType.java:74)
at org.hibernate.type.CollectionType.replace(CollectionType.java:552)
at org.hibernate.type.AbstractType.replace(AbstractType.java:153)
at org.hibernate.type.TypeFactory.replaceAssociations(TypeFactory.java:564)
at org.hibernate.event.def.DefaultMergeEventListener.copyValues(DefaultMergeEventListener.ja
va:366)
at org.hibernate.event.def.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventList
ener.java:195)
at org.springframework.orm.hibernate3.support.IdTransferringMergeEventListener.entityIsTrans
ient(IdTransferringMergeEventListener.java:58)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:
123)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:
53)
at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:677)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:661)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:665)
... 104 more
Caused by: java.lang.IllegalArgumentException: java.lang.ClassCastException@c4eeea
at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:1
45)
... 127 more
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