I have class DataProducer which contains a reference to class Person as 'contact'.
Also have class Deployment that extends DataProducer which has a reference to a class
Device
I am only to able to update a DataProducer instance's 'contact' field, but only if I
queried it as a Deployment and then upcast
it to a DataProducer.
If Ive OQL'd for a DataProducer that happens to also be a Deployment, I get errors as
below...
>>>[java] org.exolab.castor.jdo.DataObjectAccessException: Type conversion error:
>>>could not set null to FieldMolder of myapp.Deployment.setdevice(myapp.Device device)
>>>
>>>[java] [ssds_test] org.exolab.castor.jdo.TransactionAbortedException: Nested error:
>>>java.lang.IllegalArgumentException: object is not an instance of declaring class
How do I need to modify my mapping or classes so can i correctly operate on any
DataProducer class... do I need to downcast to the correct instance of someplace????
Thanks in advance for any help!
Rich Schramm
<!-- **************************************** -->
<!-- Mapping for DataProducer -->
<!-- **************************************** -->
<class name="myapp.DataProducer"
identity="id"
key-generator="UniqueID">
<map-to table="DataProducer" />
<field name="id" type="integer">
<sql name="id" type="integer" />
</field>
<field name="name" type="string">
<sql name="name" type="char" />
</field>
<field name="contact" type="myapp.Person">
<sql name="ownerID_FK"/>
</field>
<field name="someEvents" type="myapp.SomeEvent"
collection="collection">
<sql many-key="DataProducerID_FK"/>
</field>
<!-- DataProducer has reference to ResourceFile with many-many relationship -->
<field name="resourceFiles" type="myapp.ResourceFile" collection="collection" >
<sql name="ResourceID_FK"
many-table="DataProducerAssocResource" many-key="DataProducerID_FK" />
</field>
<!-- DataProducer has list of its DataContainers -->
<field name="dataContainers" type="myapp.DataContainer"
collection="collection" >
<sql many-key="DataProducerID_FK"/>
</field>
</class>
<!-- **************************************** -->
<!-- Mapping for Deployment, extending DataProducer -->
<!-- **************************************** -->
<!-- extends="myapp.DataProducer" uses that key generator -->
<class name="myapp.Deployment"
extends="myapp.DataProducer" identity="id" >
<map-to table="Deployment" />
<field name="id" type="integer">
<sql name="id" type="integer" />
</field>
<field name="device" type="myapp.Device">
<sql name="DeviceID_FK"/>
</field>
<field name="parent"
type="myapp.Deployment"
>
<sql name="parent_id"
many-table="DeploymentParentChild"
many-key="child_id"
/>
</field>
<field name="children"
type="myapp.Deployment"
collection="collection"
set-method="setChildren"
get-method="getChildren"
lazy="true" >
<sql name="child_id"
many-table="DeploymentParentChild"
many-key="parent_id"
/>
</field>
</class>
<!-- **************************************** -->
<!-- Mapping for Device -->
<!-- **************************************** -->
<class name="myapp.Device"
identity="id"
key-generator="UniqueID">
<cache-type type="count-limited" capacity="100"/>
<map-to table="Device" />
<field name="id" type="integer">
<sql name="id" type="integer" />
</field>
<field name="contact" type="myapp.Person">
<sql name="ownerID_FK" />
</field>
<field name="name" type="string">
<sql name="name" type="char" />
</field>
<field name="type" type="string">
<sql name="type" type="char" />
</field>
<field name="deployments" type="myapp.Deployment"
collection="collection">
<sql many-key="DeviceID_FK"/>
</field>
<!-- Device has reference to ResourceFile with many-many relationship -->
<field name="resourceFiles" type="myapp.ResourceFile" collection="collection">
<sql name="ResourceID_FK"
many-table="DeviceAssocResource" many-key="DeviceID_FK" />
</field>
</class>
<!-- **************************************** -->
<!-- Mapping for Person -->
<!-- **************************************** -->
<class name="myapp.Person" identity="id" key-generator="UniqueID" >
<cache-type type="unlimited" />
<!-- <cache-type="unlimited" /> -->
<map-to table="Person" />
<field name="id" type="integer">
<sql name="id" type="integer"/>
</field>
<field name="name" type="string">
<sql name="name" type="char" dirty="check" />
</field>
</class>
/****************** java for class DataProducer **********/
package myapp;
import java.util.Collection;
import java.util.ArrayList;
import java.util.Date;
import org.exolab.castor.jdo.*; // for jdo timestamp interface
public class DataProducer implements TimeStampable {
/*** manage data containers for this data producer ***/
public void addDataContainer( DataContainer dc) {
_datacontainers.add(dc);
dc.setDataProducer(this);
}
public Collection getDataContainers() {
return new ArrayList(_datacontainers);
}
public DataContainer createDataContainer() { return new DataContainer(); }
/*** end manage data containers for this data producer ***/
public int getId(){ return _id; }
public void setId(int id){ _id = id; }
public Person getContact(){ return _contact; }
public void setContact(Person contact){ _contact = contact; }
public Date getStartDate(){ return _startDate; }
public void setStartDate(Date startDate){ _startDate = startDate; }
public Date getEndDate(){ return _endDate; }
public void setEndDate(Date endDate){ _endDate = endDate; }
public String getName(){
return _name;
}
public void setName(String s){
_name = s;
}
/*** manage event list for this data producer ***/
public void addSomeEvent( SomeEvent e) {
_events.add(e);
e.setDataProducer(this);
}
public Collection getSomeEvents() {
return new ArrayList(_events);
}
public SomeEvent createSomeEvent() { return new SomeEvent (); }
/*** end manage event list for this data producer ***/
/*** manage ResourceFile list for this data producer ***/
public Collection getResourceFiles() { return new ArrayList(_resources); }
public void addResourceFile( ResourceFile r )
{
if ( ! _resources.contains( r ) ) {
_resources.add( r );
r.addDataProducer( this );
}
}
/*** end ResourceFile list for this data producer ***/
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append("(DataProducer Id#: " + _id + ") Name: "+ _name);
sb.append("- a generic DataProducer" );
return sb.toString();
}
/**
* The timeStamp value. Used for Long Transactions in Castor.
*/
private long _timeStamp;
public long jdoGetTimeStamp() { return _timeStamp; }
public void jdoSetTimeStamp(long p1){ _timeStamp = p1; }
protected int _id;
private Person _contact;
private Date _startDate;
private Date _endDate;
protected String _name;
private Collection _datacontainers = new ArrayList();
private Collection _resources = new ArrayList();
private Collection _events = new ArrayList();
} //end class definition
/****************** java for class Deployment**********/
package myapp;
import java.util.Collection;
import java.util.ArrayList;
public class Deployment extends DataProducer {
// overide default constructor to sets the parent,
// and add self to the parents child list
public Deployment() { this( null, null ); }
public Deployment( Device device, Deployment parent )
{
_parent = parent;
_device = device;
if( device != null) device.addDeployment(this);
_children= new ArrayList();
if( device != null) device.addDeployment(this); //else error?
if( parent != null ) parent.addChild( this ); //not root
}
// end constuctors
public Device getDevice(){ return _device; }
public void setDevice(Device device){ _device = device;}
//jdo required functions to manage lists
public Deployment getParent(){ return _parent; }
public void setParent( Deployment parent )
{
_parent = parent;
}
public Collection getChildren(){ return new ArrayList( _children ); }
public void setChildren( Collection childrenList )
{ _children = new ArrayList( childrenList ); }
public void addChild( Deployment child )
{
_children.add( child );
child.setParent( this );
}
// end jdo required...
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append("(Deployment Id#: " + _id + ")");
return sb.toString();
}
private Device _device;
private Deployment _parent;
private Collection _children = new ArrayList();
}
/****************** java for class Device**********/
package myapp;
import java.util.Collection;
import java.util.ArrayList;
import org.exolab.castor.jdo.*; //for jdo timestamp interface
public class Device implements TimeStampable {
public int getId() { return _id; }
public void setId(int id) { _id = id; }
public String getName() { return _name; }
public void setName(String name) { _name = name; }
public Person getContact() { return _contact; }
public void setContact(Person contact) { _contact = contact; }
public String getType(){ return _type; }
public void setType(String t){ _type = t; }
/*** manage deployments for this device ***/
public void addDeployment( Deployment d ) {
_deployments.add( d );
d.setDevice(this);
}
public Collection getDeployments() {
return new ArrayList(_deployments);
}
public Deployment createDeployment() { return new Deployment(); }
/*** end manage deployments for this device ***/
/*** manage resources for this device ***/
/******* public Collection getResources() { return new ArrayList( _resources); }
public void addResource( Resource r )
{
if ( ! _resources.contains( r ) ) {
_resources.add( r );
r.addDevice( this );
}
}
********/
public Collection getResourceFiles() { return new ArrayList(_resources); }
public void addResourceFile( ResourceFile r )
{
if ( ! _resources.contains( r ) ) {
_resources.add( r );
r.addDevice( this );
}
}
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append("(Device Id#: " + _id + ")");
return sb.toString();
}
/**
* The timeStamp value. Used for Long Transactions in Castor.
*/
private long _timeStamp;
public long jdoGetTimeStamp() { return _timeStamp; }
public void jdoSetTimeStamp(long p1){ _timeStamp = p1; }
private int _id;
private String _name;
private Person _contact;
private Collection _deployments = new ArrayList();
private Collection _resources = new ArrayList();
private String _type;
} //end class definition
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