Parser Implementation

In this section, we implement the parser design from the preceding section using C++ and ATL. Unlike the functoid implementation earlier, there is not a method for implementing the parser using Visual Basic. The COM interface uses types, such as IStream, not accessible from Visual Basic.

The parser implementation comprises the following items:

  • BizTalk channel configuration

  • A COM coclass implementing IBizTalkParserComponent

The COM coclass provides the following:

  • Identification— Given a data stream, test whether it is the input format for the parser.

  • Properties— Get organization identifiers, codepages, and other properties.

  • Group separation— Identify grouping boundaries.

  • Document separation— Identify document boundaries.

We will ...

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