Generate database schema

Question

I've two classes
public class Aggregation
// Each element is an instance of Individual
private List elementList = new ArrayList();
...getter/setter...
public class Individual
private String name = null;
...getter/setter...
If I want to generate only two database tables using SchemaTool,
t_aggregation and t_individual, without additional field in class
Individual. How to write metadata file? How can I associate t_aggregation
with t_individual?
Can kodo automatically generate :
create table t_individual
name VARCHAR(255),
aggregationIdx BIGINT(20),
Thanks
Liang Zhilong
EMail : [email protected]
Tel : [phone]
Fax : [phone]
PhotonicBridges Co., Ltd.
12F, 900 Yi Shan Rd., Shanghai 200233

Answer 1

Liang-
If you can add an field in Individual valled "aggregation" that refers
back to the Aggregation that owns it, then you can use the inverse
extension. E.g., something like:
<class name="Aggregation">
<field name="elementList">
<collection element-type="Individual"/>
<extension vendor-name="kodo" key="inverse" value="aggregation"/>
</field>
</class>
<class name="Individual">
<field name="aggregation"/>
</class>
You will need the back-reference "aggregation" field, though: this is a
restriction that we hope to eliminate in the future.
See:
http://docs.solarmetric.com/manual.html#meta-field-inverse
In article <bdu17e$drj$[email protected]>, Liang Zhilong wrote:
I've two classes
public class Aggregation
// Each element is an instance of Individual
private List elementList = new ArrayList();
...getter/setter...
public class Individual
private String name = null;
...getter/setter...
If I want to generate only two database tables using SchemaTool,
t_aggregation and t_individual, without additional field in class
Individual. How to write metadata file? How can I associate t_aggregation
with t_individual?
Can kodo automatically generate :
create table t_individual
name VARCHAR(255),
aggregationIdx BIGINT(20),
Thanks
Liang Zhilong
EMail : [email protected]
Tel : [phone]
Fax : [phone]
PhotonicBridges Co., Ltd.
12F, 900 Yi Shan Rd., Shanghai 200233
Marc Prud'hommeaux [email protected]
SolarMetric Inc. http://www.solarmetric.com