RE: [xsl] Checking for nodes in other nodes

["Aron Bock" <aronbock@xxxxxxxxxxx>]

Joe,

I'm making up some data to show something similar; it may be instructive to 
work/adapt it to your needs:

This input (note that machine-3 uses B twice):

<data>
   <enums>
       <enum>A</enum>
       <enum>B</enum>
   </enums>
   <machines>
       <machine name="machine-1">
           <value>A</value>
       </machine>
       <machine name="machine-2">
           <value>A</value>
       </machine>
       <machine name="machine-3">
           <value>B</value>
           <value>B</value>
       </machine>
   </machines>
</data>

And this XSL:

<?xml version="1.0" encoding="iso8859-1"?>
<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
   <xsl:output method="xml" indent="yes"/>

   <xsl:key match="machine" name="k-machines-per-enum" use="value"/>

   <xsl:template match="data">
       <xsl:copy>
           <xsl:apply-templates select="enums/enum"/>
       </xsl:copy>
   </xsl:template>

   <xsl:template match="enum">
       <enum value="{.}">
           <xsl:attribute name="usecount">
               <xsl:value-of select="count(key('k-machines-per-enum', 
.))"/>
           </xsl:attribute>
       </enum>
   </xsl:template>

</xsl:stylesheet>

Yields this, each enum and the number of machines in which it is used:

<?xml version="1.0" encoding="UTF-8"?>
<data>
 <enum value="A" usecount="2"/>
 <enum value="B" usecount="1"/>
</data>


The idea, then, is that as you generate a common header with those enums 
whose usage count is greater than 1.  Also, when you generate a specific C 
file, include those enums whose [unique] usage count, for that machine is 1.

Regards,

--A

> From: "Simon, Jb" <jb.simon@xxxxxxxx>
> Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] Checking for nodes in other nodes
> Date: Tue, 07 Jun 2005 11:29:44 -0400
>
>
>
> Given the following XML
>
> <EnumeratedType>
> 	<Name>Speed Type</Name>
> 	<Enumeration>
> 		<Name>Low</Name>
> 		<Value>1</Value>
> 	</Enumeration>
> 	<Enumeration>
> 		<Name>Med</Name>
> 		<Value>5</Value>
> 	</Enumeration>	<Enumeration>
> 		<Name>High</Name>
> 		<Value>8</Value>
> 	</Enumeration>
> </EnumeratedType>
>
> <Equipment>
> 	<Name>Motor</Name>
> 	<Message>
> 		<Name>Motor Speed</Name>
> 		<Field>
> 			<Name>MotorID</Name>
> 			<DataType>integer</DataType>
> 		</Field>
> 		<Field>
> 			<Name>Speed<Name >
> 			<DataType>Enumerated Type</DataType>
> 			<EnumeratedType>Speed Type</EnumeratedType>
> 		</Field>
> 	</Message/
> </Equipment>
>
> What I need to be able to determine is if an enumerated type is used in
> more than one equipment. (The XSL is used to generate C code, and each
> equipment is generated to a different file. If the type is used in
> multiple pieces of equipment then it should be generated to a
> "common_types.h" file, if it is only used by ne piece of equipment then
> it should be generated in that equipment's file)
>
> Currently I can use the same .xsl to generate the different files, using
> a command line parameter, however, all of the enumerated types are
> generates to all files at this point. I'm pretty noob and cluless about
> xslt, so I don't even know where to begin to attempt this part of the
> task.

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