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frenz
 Post subject: find by example
PostPosted: Wed Jun 20, 2007 2:45 pm 
Newbie

Joined: Tue Jan 23, 2007 3:25 am
Posts: 5
Hi everyone,
I need some help doing a query...
Let's assume:

Code:
class A{
String attributeA1;
String attributeA2;

}

class B{
String attributeB;
A a;
}


......

Code:
B exampleB = new B();
A exampleA = new A();
exampleA.attributeA1 = "attributeA1";
exampleA.attributeA2 = "attributeA2";
exampleB .setA( exampleA  );

......

I am trying to run the following query:

Code:
Example example = Example.create( B );
example.enableLike(MatchMode.ANYWHERE);

Criteria criteria = session.createCriteria( B.getClass() );
criteria.add( example );

List l =  criteria.add(example).list();


It doesn't work...search ignores the attributes set in A. It works only for the attribute inside class B.
I'm doing something wrong????
Thanks
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amila733
 Post subject:
PostPosted: Thu Jun 21, 2007 12:16 am 
Senior
Senior

Joined: Thu May 17, 2007 2:31 am
Posts: 194
Location: Sri Lanka
Hi

Can you send more detail about

Example example = Example.create( B );
example.enableLike(MatchMode.ANYWHERE);


and

What you want in words.


Amila
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frenz
 Post subject:
PostPosted: Thu Jun 21, 2007 3:11 am 
Newbie

Joined: Tue Jan 23, 2007 3:25 am
Posts: 5
amila733 wrote:
Hi

Can you send more detail about

Example example = Example.create( B );
example.enableLike(MatchMode.ANYWHERE);


and

What you want in words.


Amila


Thanks for your answer....(..and sorry for my bad english)

In words...i need to to a search by example using the fields contained in a class A but using a class B which has a reference to A.
For example...B is an object representing a client which has a reference to an object A which contains all the info about B Employer.
I want to search all the Clients that have an Employer with a particular attribute.
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amila733
 Post subject:
PostPosted: Thu Jun 21, 2007 3:19 am 
Senior
Senior

Joined: Thu May 17, 2007 2:31 am
Posts: 194
Location: Sri Lanka
Hi

what is Example

and what is the implementatiopn of Example.create( B );


Amila
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frenz
 Post subject:
PostPosted: Thu Jun 21, 2007 4:03 am 
Newbie

Joined: Tue Jan 23, 2007 3:25 am
Posts: 5
amila733 wrote:
Hi

what is Example

and what is the implementatiopn of Example.create( B );


Amila



org.hibernate.criterion.Example

Looking at chapter 12.6. Example queries
[url]
http://www.hibernate.org/hib_docs/refer ... teria.html
[/url]

Quote:
The class net.sf.hibernate.expression.Example allows you to construct a query criterion from a given instance.

Version properties, identifiers and associations are ignored. By default, null valued properties are excluded.

You can adjust how the Example is applied.



maybe I found the solution...in theese lines of manuals...associations are ignored

Is there a way to do an example query using associations too??
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amila733
 Post subject:
PostPosted: Thu Jun 21, 2007 5:16 am 
Senior
Senior

Joined: Thu May 17, 2007 2:31 am
Posts: 194
Location: Sri Lanka
Hi

Sorry i thought it is your own class


Amila
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frenz
 Post subject:
PostPosted: Thu Jun 21, 2007 5:51 am 
Newbie

Joined: Tue Jan 23, 2007 3:25 am
Posts: 5
amila733 wrote:
Hi

Sorry i thought it is your own class


Amila


Don't worry....thanks :)
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dhr_padla
 Post subject:
PostPosted: Thu Jun 28, 2007 12:37 pm 
Newbie

Joined: Mon Mar 05, 2007 9:04 am
Posts: 6
Location: Belarus
I think this should work:
Code:
List l = session.createCriteria(B.getClass())
         .add(Example.create(exampleB))
         .createCriteria("a")
         .add(Example.create(exampleB.getA()))
         .list();


But i can't figure out what should I do to make it working for the case when I need to supply examples for more than one nested objects (.createCriteria("a") roots criterion in the "a" property so all subsequent .createCriterias are applied to the a property)

Someone knows?
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frenz
 Post subject:
PostPosted: Thu Jun 28, 2007 3:42 pm 
Newbie

Joined: Tue Jan 23, 2007 3:25 am
Posts: 5
Yes should work...however that was just an example, i've got many associations and settings them manually (for each kind of root object) is impossible...

However i found the solution in this post:
[url]
http://forum.hibernate.org/viewtopic.php?t=942872
[/url]

..it works really well!!
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