Test if current (root) node name equals string - xslt

Question

I have an XML which might be like one of the following:
// #1
<A>
<B>... stuff ...</B>
</A>
// #2
<B>... stuff ...</B>
I need to transform these into a response node which should look the same for both instances. Sort of like this:
<fooMethodResponse>
... one thing from A if A was root ...
... stuff from B ...
</fooMethodResponse>
How can I do this simplest without repeating myself? I have done this now:
<xsl:template match="/A">
<fooMethodResponse>
<xsl:apply-templates select="B" mode="get-B" />
<xsl:element name="processId">
<xsl:value-of select="#id" />
</xsl:element>
</fooMethodResponse>
</xsl:template>
<xsl:template match="/B">
<fooMethodResponse>
<xsl:apply-templates select="." mode="get-B" />
</fooMethodResponse>
</xsl:template>
<xsl:template match="B" mode="get-B"></xsl:template>
Problem here is I'm repeating the response wrapper, and I'd like to only have that in one place. Figured I could do something like this:
<xsl:template match="/">
<fooMethodResponse>
<xsl:choose>
<xsl:when test="node name is A">
<xsl:when test="node name is B">
</xsl:choose>
</fooMethodResponse>
</xsl:template>
But I can't figure out how to write the test to check the node name of the root element. Are root elements handled differently somehow?
I'd like to give more precise examples, but is quite a bit of business stuff in there so I've tried to boil it down :p

Answer 1

I'm not sure about what you want to do, more precise input and output samples are needed.
Nevertheless, the following XSLT (1.0) can be a base to solve your problem :
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
<xsl:template match="/">
<fooMethodResponse>
<xsl:apply-templates/>
</fooMethodResponse>
</xsl:template>
<xsl:template match="A">
<xsl:text>... one thing from A if A was root ...</xsl:text>
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="B">
<xsl:text>... stuff from B ...</xsl:text>
</xsl:template>
</xsl:stylesheet>
For input #1 :
<A>
<B>... stuff ...</B>
</A>
Result #1 is :
<fooMethodResponse>... one thing from A if A was root ...
... stuff from B ...
</fooMethodResponse>
For input #2 :
<B>... stuff ...</B>
Result #2 is :
<fooMethodResponse>... stuff ...</fooMethodResponse>
Hope this helps!

Answer 2

What you can do is combine patterns with the | operator e.g.
<xsl:template match="/A[B] | /B">
<fooMethodResponse>...</fooMethodResponse>
</xsl:template>
Whether that makes sense or simplifies things in your case I am not sure as I don't understand what you want to put inside of fooMethodResponse for the two different elements. Consider to spell out each result sample for each possible input sample you have posted, your current single result sample is not clear to me.