XSLT Cookbook

Generating Data Wrappers

Problem

You want to create classes that wrap the data contained in each message with a type-safe interface.

Solution

The solution works in two modes. If a message name is provided in a parameter, then it generates a wrapper only for that message data. Otherwise, if no message is specified, it generates wrappers for all messages:

<xsl:stylesheet version="1.1" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="text"/> <xsl:strip-space elements="*"/> <!--The message to generate data for. '*' for all --> <xsl:param name="message" select=" '*' "/> <!--The directory to generate code --> <xsl:param name="generationDir" select=" 'src/' "/> <!--The C++ header extension to use --> <xsl:param name="headerExt" select=" '.h' "/> <!--The C++ source extension to use --> <xsl:param name="sourceExt" select=" '.C' "/> <!--Key to locate data types by name --> <xsl:key name="dataTypes" match="Structure" use="Name" /> <xsl:key name="dataTypes" match="Primitive" use="Name" /> <xsl:key name="dataTypes" match="Array" use="Name" /> <xsl:key name="dataTypes" match="Enumeration" use="Name" /> <!-- Top level template determines which messages to process --> <xsl:template match="/"> <xsl:choose> <xsl:when test="$message = '*'"> <xsl:apply-templates select="*/Messages/*"/> </xsl:when> <xsl:when test="*/Messages/Message[Name=$message]"> <xsl:apply-templates select="*/Messages/Message[Name=$message]"/> </xsl:when> <xsl:otherwise> <xsl:message terminate="yes">No such ...