Re: [sca-policy] NEW ISSUE: Clarifying the Domain Composite Infoset

[Mike Edwards <mike_edwards@uk.ibm.com>]

Folks,

As you will have seen from my posting
on the discussion which led up to this issue being raised,
I disagree.  I don't believe there
is an issue here along the lines described below.



Yours,  Mike.

Strategist - Emerging Technologies, SCA & SDO.
Co Chair OASIS SCA Assembly TC.
IBM Hursley Park, Mail Point 146, Winchester, SO21 2JN, Great Britain.
Phone & FAX: +44-1962-818014    Mobile: +44-7802-467431  
Email:  mike_edwards@uk.ibm.com

From:	ashok malhotra <ashok.malhotra@oracle.com>
To:	oasis Policy <sca-policy@lists.oasis-open.org>
Date:	17/09/2009 14:09
Subject:	[sca-policy] NEW ISSUE:  Clarifying the Domain Composite Infoset

---

Raymond Feng and I have been exchanging mail on the
list.  This issue 
arose as a result of that interaction.

Raymond makes  two points about the  Domain Composite Infoset:

1. The assembly spec defines a URI  scheme for embedded composites.
  
But the URI needs to be
surfaced in an attribute so that it can be selected using an XPath 
expression.

2. Raymond argues that the embedded composites need to be inlined rather
that referenced. 
If the Infoset corresponds to:

[1]
<composite xmlns:ns2="http://ns2
<http://ns2/>"
...>
  <component name="Component1" *uri="Component1"*>
        <implementation.composite name="ns2:InnerComposite"/>
  </component>
</composite>

Applying //component[@uri='Component1/Component2'] against the XML 
doesn't select Component2 as it is NOT an element in the tree. If we 
inline the inner composite into the domain composite as illustrated 
below, the it would work.

[2]
<composite xmlns:ns2="http://ns2
<http://ns2/>"
...>
   <component name="Component1" *uri="Component1**"*>
   <implementation.composite name="ns2:InnerComposite">
       <!-- For demo purpose, Inline the inner composite
-->
       <composite targetNamespace="http://ns2
<http://ns2/>"
name="InnerComposite">
           <service name="Service1"
promote="Component2/Service1"/>
           <reference name="ref1"
promote="Component2/ref1"/>
           <component name="Component2"
*uri="Component1/Component2"*>
                <implementation.java
class="sample.Component2Impl"/>
           </component>
        </composite>
   </implementation.composite>
  </component>
</composite>

-- 
All the best, Ashok

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