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DejaVU Online:
Principles of Object-Oriented Software Development
(©)
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Instructor's Guide
introduction
example
types
operations
inheritance
bindings
The Interface Definition Language (IDL)
that accompanies CORBA-2.0 provides the constructs
needed to specify interfaces only.
IDL allows for specifying modules, consisting of interfaces.
An interface specification may contain (read only) attributes
and operations. Operations are synchronous, unless
annotated as oneway.
Operations may raise exceptions upon failure.
Interface Definition Language
IDL
- modules -- for clustering
- interfaces -- correspond with objects
- attributes -- may be read only
- operations -- best effort invocation
- exceptions -- for handling failure
Language bindings
See http://www.infosys.tuwien.ac.at/Research/Corba/OMG
slide: Interface Definition Language -- IDL
Although IDL is syntactically very similar to C++ or Java,
it completely lacks the algorithmic constructs of these languages.
Objects specified in IDL must be realized in one of the
languages for which an official IDL language binding exists,
such as C, Smalltalk, C++ or Java, or an unofficial binding,
such as Python, Perl and Prolog.
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