Re: [sca-j] Issue 225: proposal to resolve

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

Folks,

Anish's formulation is a tad too mathematical
for my tastes (I am a humble physicist by background...) and so I suggest
the following alternative wording:

"interface.java child element is present, with the
interface attribute set as follows:

1.        if
only one bean refers to the bean reference, then the interface attribute
is set to the fully qualified name of the interface class identified by
the bean reference
2.        if
two or more beans refer to the bean reference, each bean reference identifies
an interface class.  Each interface class in the set of interface
classes has to be either the same as, or an ancestor of, or a descendent
of, each other interface class in the set.  If this condition does
not hold true then the SCA runtime MUST raise an error [SPRxxxxx].  The
interface attribute is set to the fully qualified name of the interface
class which has the highest depth in the inheritance tree in the set of
interface classes - i.e. it is set to the most specific subclass amongst
all the interface classes identified by the bean references.  

For example, if two bean A and B refer to a bean reference
C, and the interface class identified by bean A for reference C is I1,
and that of bean B is I2, and if I2 is a subclass of I1, then the interface
attribute value for the introspected implicit reference is set to I2."


Yours, Mike

Dr Mike Edwards		Mail Point 146, Hursley Park
STSM		Winchester, Hants SO21 2JN
SCA & Services Standards		United Kingdom
Co-Chair OASIS SCA Assembly TC
IBM Software Group
Phone:	+44-1962 818014
Mobile:	+44-7802-467431 (274097)
e-mail:	mike_edwards@uk.ibm.com

From:	Anish Karmarkar <Anish.Karmarkar@oracle.com>
To:	OASIS Java <sca-j@lists.oasis-open.org>
Date:	14/02/2011 08:14
Subject:	[sca-j] Issue 225: proposal to resolve

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Here is my proposal to resolve issue 225.
Comments?

-Anish
--

In section 3, for the case where there is no <sca:reference/> and
no <sca:property> elements in the app context, replace the text

"interface.java child element is present, with the interface attribute
set to the fully qualified name of the interface class identified by the
bean reference"

with:

"interface.java child element is present, with the interface attribute
set as follows:

1.        if
only one bean refers to the bean reference, then the interface attribute
is set to the fully qualified name of the interface class identified by
the bean reference
2.        if
two or more beans refer to the bean reference, then:
Let S be the set of fully qualified names of the
interface classes identified by the bean references. ∀ s1, s2
∈ S, s1 is either an ancestor or descendant of s2
in the class inheritance tree. If this condition does not hold true then
the SCA runtime MUST raise an error [SPRxxxx]. The interface attribute
is set to that member of S whose depth in the inheritance tree is
the highest amongst all the members of S. I.e., it is set to the
most specific subclass amongst all the interface classes identified by
the bean references.
For example, if two bean A and B refer to a bean reference
C, and the interface class identified by bean A for reference C is I1,
and that of bean B is I2, and if I2 is a subclass of I1, then the interface
attribute value for the introspected implicit reference is set to I2.

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