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From "Rajeev Chaudhary (JIRA)" <j...@apache.org>
Subject [jira] Created: (OPENJPA-1564) How to Utilizing the variable define in non-entity base class, in the entity sub class.
Date Thu, 11 Mar 2010 21:24:27 GMT
How to Utilizing the variable define in non-entity base class, in the entity sub class.
---------------------------------------------------------------------------------------

                 Key: OPENJPA-1564
                 URL: https://issues.apache.org/jira/browse/OPENJPA-1564
             Project: OpenJPA
          Issue Type: Question
            Reporter: Rajeev Chaudhary


I have BaseFacDto class with defined properties. I have sub-class FacDto (entity) extending
BaseFacDto. 

public abstract class BaseFacDto {
	@Column(name="FAC_NAME")
	public String facName;
---
}

@Entity
@Table(name="FAC")
public class FacDto extends BaseFacDto implements Serializable {
	public FacDto(){}
	@Id @Column(name="FAC_ID", nullable = false)
	private String facId;
	@Column(name="FAC_ADDRESS")
	private String facAddress;
	@Column(name="LABID")
}

Questions:
1. When the query   fac = clep.find(FacDto.class, facId);    I don't see FAC_NAME in the logged
SQL generated.  Since Base class has this variable, so sub-class also get it by inheritance.
 Please verify. I have define it like this in base class
       @Column(name="FAC_NAME")
	private String facName; 

2. I also tried this thing. I created the variable in the sub-class without getter-setter.
Now I see the FAC_NAME in the sql log. But the issue now is when I execute getter methods
( inherited from base class). the value is always null.
        @Column(name="FAC_NAME")
	private String facName;

3. How OpenJPA different from JPA. I see that all OpenJpa sample uses the javax.persistance.jar
(JPA jar). I am little confused over this. Please clarify
http://openjpa.apache.org/quick-start.html


Please help. 
Thanks in advance
Rajeev


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