How the Intent work

[Honghsi Lo]

Hi,

I am working on a networking base java binding for Tuscany.  When I specified 
'requires="legacy"' in the reference of composite, I got 
PolicyValidationException generated by PolicyValidationUtils.java because the 
returned constrained is null.  I checked IntentImpl.java, it has 

private List<QName> constrains = new ArrayList<Qname>();

...

public List<QName> getConstrains() {
  return constrains;
}

....

But there is no way to add anything to the constrains list.  What should I do 
in my binding to avoid this exception and my binding's invoke method can check 
this legacy intent?  BTW, I am using version 1.2 binaries.

Regards,

honghsi