In addition to Marc's explanation+
If the collection/map field is instantiated with a type more specific
than the declared type (either in field declaration or in no-arg
constructor), then the more specific type is used.
for example,
public class A {
Collection f1 = new HashSet();
List f2;
public A() {
f2 = new LinkedList();
}
}
OpenJPA will use ProxyHashSet for f1 and ProxyLinkedList for f2.
Pinaki Poddar
BEA Systems
415.402.7317
-----Original Message-----
From: Dain Sundstrom [mailto:[EMAIL PROTECTED]
Sent: Wednesday, December 13, 2006 7:24 PM
To: open-jpa-dev@incubator.apache.org
Subject: Re: Are relation sets identity, pk or bean.equals() based?
On Dec 13, 2006, at 4:56 PM, Marc Prud'hommeaux wrote:
>> If you declare the field to be an interface type and you don't
>> initialize the field to anything, I don't remember how we decide what
>> impl to use.
>
> Looking at the code in ProxyManagerImpl.java, it appears that we
> default to ArrayList for fields declared as type Collection, HashSet
> for fields declared as type Set, TreeSet for fields declared as type
> SortedSet, and ArrayList for fields declared as type List.
Thanks! That is exactly what I wanted to know.
-dain
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