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This example shows how to handle XML vocabularies with multiple
root elements using the Embedded C++/Parser mapping.
The example consists of the following files:
protocol.xsd
XML Schema which defines a simple bank account protocol with
requests such as withdraw and deposit.
balance.xml
withdraw.xml
deposit.xml
Sample XML instances for the protocol requests.
protocol.hxx
C++ types that describe the protocol requests. These are
hand-written.
protocol.map
Type map. It maps XML Schema types defined in protocol.xsd
to the C++ types defined in protocol.hxx.
protocol-pskel.hxx
protocol-pskel.cxx
Parser skeletons generated by XSD/e from protocol.xsd and
protocol.map.
protocol-pimpl-mixin.hxx
protocol-pimpl-mixin.cxx
protocol-pimpl-tiein.hxx
protocol-pimpl-tiein.cxx
Parser implementations (using either mixin or tiein parser
reuse style) that construct the custom object model from an
XML instance using the types from protocol.hxx. These are
hand-written implementations of the parser skeletons defined
in protocol-pskel.hxx.
driver.cxx
Driver for the example. It implements a custom document parser
that determines which request is being parsed and uses the
corresponding parser implementation. The document parser
intentionally does not support the deposit request to show
how to handle unknown documents. The driver first constructs
a parser instance from all the individual parsers found in one
of protocol-pimpl-*.hxx. In then invokes this parser instance
to parse the input file and produce the in-memory object model.
Finally, it prints the contents of the object model to STDERR.
To run the example on the sample XML request documents simply
execute:
$ ./driver balance.xml
$ ./driver withdraw.xml
$ ./driver deposit.xml
The example reads from STDIN if input file is not specified:
$ ./driver <balance.xml
$ ./driver <withdraw.xml
$ ./driver <deposit.xml
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