Error 500: could not initialize a collection in hibernate mapping - oracle

Question

I am a newbie for Hibernate. Hope you guys can help me debug below error which really make me crazy.
I got a table called CONTENT_WORKGROUP which will map to another table called CONTENT_WORKGROUP_ROLE. Below is the table structure and sample data:
CONTENT_WORKGROUP
CM_WORKGROUP_ID NUMBER(15,0)
WORKGROUP_ID NUMBER(15,0)
ROLE_ID VARCHAR2(20 BYTE)
CONTENT_WORKGROUP_ROLE
CM_WORKGROUP_ROLE_ID NUMBER(15,0)
ROLE_ID VARCHAR2(20 BYTE)
FUNCTION_ID VARCHAR2(40 BYTE)
P/S: One user workgroup can have multiple role (Creator, Admin, Approver). The function(Add, Edit, Delete) that can perform by this workgroup can be query from CONTENT_WORKGROUP_ROLE.
Sample DATA:
CONTENT_WORKGROUP
CM_WORKGROUP_ID WORKGROUP_ID ROLE_ID
1 136 Creator
2 137 Administrator
3 136 Administrator
CONTENT_WORKGROUP_ROLE
CM_WORKGROUP_ROLE_ID ROLE_ID FUNCTION_ID
1 Creator Copy
2 Creator Edit
3 Creator Delete
4 Creator Add
5 Administrator Edit
6 Administrator Approve
7 Administrator Reject
However, I am getting the error when I get the SET of ContentWorkgroupRole hold by particular workgroup.
[11/23/10 15:28:56:053 SGT] 00000039 SystemOut O [23/11/2010 15:28:56.053] ERROR JDBCExceptionReporter - ORA-01722: invalid number
[11/23/10 15:28:56:100 SGT] 00000039 ServletWrappe E SRVE0068E: Uncaught exception thrown in one of the service methods of the servlet: action. Exception thrown : javax.servlet.ServletException: could not initialize a collection: [corp.celcom.next.infochannel.model.ContentWorkgroup.contentWorkgroupRole#1]
Below is my hibernate mapping file:
ContentWorkgroup.hbm.xml
<hibernate-mapping>
<class name="corp.celcom.next.infochannel.model.ContentWorkgroup" table="CM_WORKGROUP" >
<id name="cmWorkgroupId" type="long">
<column name="CM_WORKGROUP_ID" precision="15" scale="0" />
CM_WORKGROUP
CM_WORKGROUP_ID
ContentWorkgroupRole.hbm.xml
<hibernate-mapping>
<class name="corp.celcom.next.infochannel.model.ContentWorkgroupRole" table="CM_WORKGROUP_ROLE" >
<id name="cmWorkgroupRoleId" type="long">
CM_WORKGROUP_ROLE_ID
CM_WORKGROUP_ROLE
<many-to-one name="contentWorkgroup" class="corp.celcom.next.infochannel.model.ContentWorkgroup" fetch="select">
<column name="ROLE_ID" precision="15" scale="0" />
</many-to-one>
In my ACTION class, the above mentioned error occured on this line:
Iterator iter = cw.getContentWorkgroupRole().iterator();
for(ContentWorkgroup cw : contentWorkgroupList)
{
Iterator iter = cw.getContentWorkgroupRole().iterator();
while (iter.hasNext()) {
ContentWorkgroupRole role = (ContentWorkgroupRole) iter.next();
if (role.getFunctionId().equalsIgnoreCase(Constant.ADD))
myForm.setAllowAdd(true);
if (role.getFunctionId().equalsIgnoreCase(Constant.EDIT))
myForm.setAllowEdit(true);
if (role.getFunctionId().equalsIgnoreCase(Constant.DELETE))
myForm.setAllowDelete(true);
}
}
The weird part is when I change the ROLE_ID to Integer/Long (i.e 1-Creator, 2-Administrator), instead of using String, it work fine! I couldn't understand why and what the problem on my code.
Thanks for you help. It took me 1 day already to cope with this error. Thanks!

Answer 1

Sorry, the display seem got abit problem. I write again here:
ContentWorkgroup.hbm.xml
<hibernate-mapping>
<class name="corp.celcom.next.infochannel.model.ContentWorkgroup" table="CM_WORKGROUP" >
<id name="cmWorkgroupId" type="long">
<column name="CM_WORKGROUP_ID" precision="15" scale="0" />
<generator class="corp.celcom.next.util.MultipleTableGenerator" >
<param name="KEYTABLE_VALUE">CM_WORKGROUP</param>
<param name="KEYCOLUMN_VALUE">CM_WORKGROUP_ID</param>
</generator>
</id>
<property name="workgroupId" type="long">
<column name="WORKGROUP_ID" precision="15" scale="0" not-null="true" />
</property>
<property name="srId" type="string">
<column name="SR_ID" length="15" not-null="true" />
</property>
<property name="contentCategoryId" type="string">
<column name="CONTENT_CATEGORY_ID" length="40" not-null="true" />
</property>
<property name="roleId" type="string">
<column name="ROLE_ID" length="20" not-null="true" />
</property>
<set name="contentWorkgroupRole" table="CM_WORKGROUP_ROLE" inverse="true">
<key>
<column name="ROLE_ID" length="20" not-null="true" />
</key>
<one-to-many class="corp.celcom.next.infochannel.model.ContentWorkgroupRole" />
</set>
</class>
ContentWorkgroupRole.hbm.xml
<hibernate-mapping>
<class name="corp.celcom.next.infochannel.model.ContentWorkgroupRole" table="CM_WORKGROUP_ROLE" >
<id name="cmWorkgroupRoleId" type="long">
<column name="CM_WORKGROUP_ROLE_ID" precision="15" scale="0" />
<generator class="corp.celcom.next.util.MultipleTableGenerator">
<param name="KEYCOLUMN_VALUE">CM_WORKGROUP_ROLE_ID</param>
<param name="KEYTABLE_VALUE">CM_WORKGROUP_ROLE</param>
</generator>
</id>
<many-to-one name="contentWorkgroup" class="corp.celcom.next.infochannel.model.ContentWorkgroup" fetch="select">
<column name="ROLE_ID" precision="15" scale="0" />
</many-to-one>
<property name="menuId" type="string">
<column name="MENU_ID" length="40" not-null="true" />
</property>
<property name="functionId" type="string">
<column name="FUNCTION_ID" length="40" not-null="true" />
</property>
In my ACTION class, the above mentioned error occured on this line:
Iterator iter = cw.getContentWorkgroupRole().iterator();
for(ContentWorkgroup cw : contentWorkgroupList)
{
Iterator iter = cw.getContentWorkgroupRole().iterator();
while (iter.hasNext()) {
ContentWorkgroupRole role = (ContentWorkgroupRole) iter.next();
if (role.getFunctionId().equalsIgnoreCase(Constant.ADD))
myForm.setAllowAdd(true);
if (role.getFunctionId().equalsIgnoreCase(Constant.EDIT))
myForm.setAllowEdit(true);
if (role.getFunctionId().equalsIgnoreCase(Constant.DELETE))
myForm.setAllowDelete(true);
}
}