hash collisions in AW ClassInfo
-------------------------------
Key: CDV-891
URL: https://jira.terracotta.org/jira//browse/CDV-891
Project: Community Development
Issue Type: Bug
Reporter: Tim Eck
Assignee: Issue Review Board
The various ClassInfo implementations in our version of aspectwerkz don't seem
to handle certain field signatures well.
My understanding of the AW internals is that a unique hash is generated to
represent particular fields in classes. The algorithm for generating the hash
usually produces unique values, but not always. Specifically if within a
particular class, if you have two (or more) fields of the same type *AND* the
hashcode() value for the String names of the fields happen to be equal, you'll
get a collision.
For example, this class should illustrate the problem:
class Foo {
Object AV;
Object B7;
}
Obtiaining the ClassInfo (asm or java) for this class, and then iterating the
fields will give two fields both named B7. The generated field hash will be the
same since both are of same type ("Ljava/lang/Object;) and the hashcode of "AV"
is equals to the hashcode of "B7"
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