Hi ,

I have a confusion about the objects lazy loading in the collection.

This is the scenario:

Class A {
Set<B> bees = new HashSet<B>();
setBees() {}
getBees() {}
}
Class B {
String name;
setName(String name) {this.name = name;}
getName() {return name;}
}

A.hbm.xml:
<set name = “bees” lazy = “true” order-by=”name” >
….
</set>

Here I don’t want to load all the B objects when I load the Object of A class. So I have given “lazy=”true” in the mapping file.

I need to execute only two methods on the collections: size() and the getName() method on the first object.

I have a confusion here that whether hibernate loads all the objects when I call the size() method on collection?
And
Does hibernate loads only one object when I call the getName() method on the first object like getBees().get(0).getName(); or all the objects?

My requirement is that I don’t want to load all the objects except first object.

Please kindly clarify me?

Thank you very much.

In the simplest case the answer to your question is that Hibernate will load all objects and populate the set when you call a method on it.

There is also the possibility to map the set with lazy="extra". I have no experience of this setting and don't really know what it does, and I can only find one sentence about it in the Hibernate documentation: http://www.hibernate.org/hib_docs/v3/re ... pping.html