property « Fetch « JPA Q&A

1. How can I retrieve a collection property using criteria Api

I want to retrieve a collection property using criteria

   public class A {  
       private Collection<B> property  

2. Hibernate lazy property fetching

Hello all - I have an object/relational mapping defined using hibernate 3.0. The table contains a binary column that I would like to set as a "lazy property". When listing records from the table, binary data is downloaded for each record returned in the query resulting in a huge performance hit. Setting the mapping element with the attribute lazy="true" does not ...

3. Property fetching

4. Retrieve unknown property names... MetaData ?

Hi I have a big problem : One of my database tables contains table and colum names. When I map this table and bring the data using Hibernate, I need to have the class entity names (I use dynamic mapping) and the property names corresponding to these data. But how to retrieve these information ? I analysed the Hibernate Metadata class ...

5. Fetch All Properties not working

Author Message halcyon Post subject: Fetch All Properties not working Posted: Wed Jul 06, 2005 3:56 pm Regular Joined: Wed Dec 17, 2003 1:58 pm Posts: 101 Hi I can't seem to get the lazy column properties loaded properly, it works fine when I'm selecting a single object by calling Hibernate.initialize()... however if I get a list of objects ...

6. Problem with FETCH ALL PROPERTIES for many-to-one properties

Hibernate version: 3.1beta2 Can anyone clarify me how FETCH ALL PROPERTIES should work I added following test method to org.hibernate.test.instrument.InstrumentTest and it fails. Code: public void testRealFetchAll() throws Exception { Session s = openSession(); Owner o = new Owner(); Document ...

7. "FETCH ALL PROPERTIES" using Criteria ?

How do I "FETCH ALL PROPERTIES" using a Criteria query? Is it possible? It's neiter in the manual nor in the API docs. Apidoc says: Criteria.setFetchMode(String associationPath, FetchMode mode) "Specify an association fetching strategy for a one-to-many, many-to-one or one-to-one association, or for a collection of values." (Nothing about lazy properties.) cheers, spunky

8. How to fetch all lazy properties!?

Hi. I'm need to fetch all lazy properties of my Object. I've tryied "fetch all properties", ive tryied it with criteria and setResultTransformer. With fetch all properties, my set named partesContrarias is not loaded. With Criteria and setFetchMode and setResultTrasfomer (as you can see below) the items in my list get duplicated!! Thanks in advance!! Hibernate version: 3.0.5 Mapping documents:

9. How to fetch lazy properties of a lazy property

I have not tried the same but I can suggest you to use the static method provided by class Hibernate to achieve what you are looking for. The method is ==> initialize(classInstance) This method is used to poplulate all the lazy intialized properties of any class objects (may be in a list) with data fetched from the database. After intializing the ...

10. fetch="join" ignores lazy property?

11. fetch and lazy property

whenever i use fetch="join" in many-to-one, hibernate egarly loading associated object. fetch="join" lazy="true" or lazy="proxy"(hibernate3) means what will happen? i have tested for fetch="join" lazy="true", now also hibernate egarly loading associated object so there is no meaning for lazy loading(lazy=true) when set fetch ="join". Is my understanding is right or? any other suggesstion and explaination for this two attrbutes are welcome.... ...

12. Fetching only selected properties in collection. Help

Hibernate version: 3.2 Mapping documents: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Kategoria.hbm.xml <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Obrazek.hbm.xml <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

13. Fetching lazy property

14. Problems of Using lazy property fetching

There is one property in my VO,and I want to set this property "lazy". I have read the doc about this in this it is: --------------------------------------------------------------------------- Hibernate3 supports the lazy fetching of individual properties. This optimization technique is also known as fetch groups. Please note that this is mostly a marketing feature, as in practice, optimizing row reads is much ...