Hibernate.initialize()

juanita · **Joined:** Wed Jan 31, 2007 11:39 am **Posts:** 24

I would like to ask something about Hibernate.initialize().
I have a pojo named Item.This pojo is LAZY.

So in my ItemDao class I get my pojo:

Code:

Item item = session.get(Item.class, itemId); -->THERE IS A SELECT HERE

Then I get the following list:

Code:

List bids = item.getBids(); --->THERE IS NO QUERY HERE

and I iterate the bids list and it is then that I have a SECOND SELECT

However if after get the Item pojo I do sth like that:

Code:

Hibernate.initialize(item.getBids) --> THERE IS A SELECT HERE

and if afterwards I iterate the list there are no selects.

My question is?What is the difference between the two ways I describe?
Why should I use Hibernate.initialize()?What does it offer?I see the same number of queries every time.

Any suggestions?

belto.ntn · **Posted:** Tue Mar 13, 2007 5:13 am

juanita wrote:

I would like to ask something about Hibernate.initialize().
I have a pojo named Item.This pojo is LAZY.

So in my ItemDao class I get my pojo:

Code:

Item item = session.get(Item.class, itemId); -->THERE IS A SELECT HERE

Then I get the following list:

Code:

List bids = item.getBids(); --->THERE IS NO QUERY HERE

and I iterate the bids list and it is then that I have a SECOND SELECT

However if after get the Item pojo I do sth like that:

Code:

Hibernate.initialize(item.getBids) --> THERE IS A SELECT HERE

and if afterwards I iterate the list there are no selects.

My question is?What is the difference between the two ways I describe?
Why should I use Hibernate.initialize()?What does it offer?I see the same number of queries every time.

Any suggestions?

The associated object inside a persistant class will be fetched lazily
you can disable it by giving lazy="false"

Hibernate.initialize() will
force the initialization of a proxy,as long as its Session is open

juanita · **Joined:** Wed Jan 31, 2007 11:39 am **Posts:** 24

Quote:

The associated object inside a persistant class will be fetched lazily
you can disable it by giving lazy="false"

No I want my pojo to be lazy.

Quote:

Hibernate.initialize() will
force the initialization of a proxy,as long as its Session is open.

So if I do not use Hibernate.initialiaze(), through iteration(where I can see SELECT) the initialization of a proxy is not initialized?
If not, what exactly the initialization of the proxy offers me?

belto.ntn · **Posted:** Tue Mar 13, 2007 6:00 am

set ur pojo lazily by setting the persistant class lazy ="false" in the mapping file in class tag

juanita · **Joined:** Wed Jan 31, 2007 11:39 am **Posts:** 24

I want my pojo to be lazy so lazy="false" is something I do not need.

What I am asking is what exactly the initialization of the proxy offers?
And if this is only offered when I use Hibernate.initialize()?

When I iterate the getBids collection and I have not used Hibernate.initialize() there is no initialization of the proxy?