Bugs have recently been fixed in
org.exolab.castor.persist.RelationCollection, but I am still seeing strange
behavior when using lazy loading and trying to query database immediately
after adding an object.
Sniplets below outlines the overall structure of my code.
Calling Address.getByClientId() causes following exception:
java.lang.RuntimeException: PersistenceException for lazy loaded object
org.exolab.castor.jdo.PersistenceException: Identities can't be null!
at
org.exolab.castor.persist.RelationCollection$IteratorImp.lazyLoad(RelationCollection.java:278)
at
org.exolab.castor.persist.RelationCollection$IteratorImp.next(RelationCollection.java:253)
at java.util.ArrayList.addAll(ArrayList.java:423)
at Address.getByClientId(Address.java:232)
at test.TestAddress.test(TestAddress.java:36)
at java.lang.reflect.Method.invoke(Native Method)
at junit.framework.TestCase.runTest(TestCase.java:166)
...
Any suggestions on what is wrong is greatly appreciated. Please let me know
if a full example is needed to investigate this further.
Kind Regards,
Jan Hansen
-------------------
Test:
...
Client c = Client.add("TEST Client for address","Description");
Address a =
Address.add(c.getId(),"address1","address2","address3","city","zip","state","country");
Collection c = Address.getByClientId(c.getId());
...
Class Client:
...
public void addAddress(Address _address){
_address.setClient(this);
this.address.add(_address);
}
...
Class Address:
...
public static Collection getByClientId(int id){
QueryResults results;
ECCasterConnectionProvider con = new ECCasterConnectionProvider(); //
Helper for instantiation
Client c = null;
Collection ret = new ArrayList();
try
{
Database db = con.getClientConnectionDNK(); // Helper for instantiation
db.begin();
OQLQuery Oql = db.getOQLQuery("Select c from Client c where c.id="+id);
results = Oql.execute();
if(results.hasMore()){
c = (Client)results.next();
ret.addAll(c.getAddress());
}
db.commit();
db.close();
} catch (Exception e){
e.printStackTrace();
}
return ret;
}
public static Address add(int clientId, String address1, String
address2,String address3, String city, String zip, String state, String
Country){
Address address = null;
try
{
Client c = null;
OQLQuery Oql = null;
QueryResults results = null;
CasterConnectionProvider con = new ECCasterConnectionProvider(); // Helper
for instantiation
Database db = con.getClientConnectionDNK(); // Helper for instantiation
address = new Address();
address.setAddress1(address1);
address.setAddress2(address2);
address.setAddress3(address3);
address.setCity(city);
db.begin();
Oql = db.getOQLQuery("Select c from Client c where c.id = " + clientId);
results = Oql.execute();
if(results.hasMore()){
c = (Client)results.next();
c.addAddress(address);
}
db.commit();
db.close();
} catch (Exception e) {
e.printStackTrace();
}
return address;
}
...
Mapping file:
<!-- Mapping for Client -->
<class name="Client" identity="id" key-generator="CLIENT_SEQ" >
<description>Client</description>
<map-to table="CLIENT" />
<field name="id" type="integer" >
<sql name="id" type="integer"/>
</field>
<field name="name" type="string" >
<sql name="name" type="char"/>
</field>
<field name="description" type="string" >
<sql name="description" type="char"/>
</field>
<field name ="address"
type = "Address"
required="false"
lazy="true"
collection="collection">
<sql many-key = "clientId"/>
</field>
</class>
<!-- Mapping for Address -->
<class name="Address" identity="id" depends="Client"
key-generator="ADDRESS_SEQ" >
<description>ADDRESS</description>
<map-to table="ADDRESS" />
<field name="id" type="integer" >
<sql name="id" type="integer"/>
</field>
<field name="address1" type="string" >
<sql name="address1" type="char"/>
</field>
<field name="address2" type="string" >
<sql name="address2" type="char"/>
</field>
<field name="address3" type="string" >
<sql name="address3" type="char"/>
</field>
<field name="zip" type="string" >
<sql name="zip" type="char"/>
</field>
<field name="city" type="string" >
<sql name="city" type="char"/>
</field>
<field name="state" type="string" >
<sql name="state" type="char"/>
</field>
<field name="country" type="string" >
<sql name="country" type="char"/>
</field>
<field name="client" type="Client" >
<sql name="clientid"/>
</field>
</class>
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