How to match template based on condition? - xslt-2.0

Question

Here is my source XML which I'm trying to transform based on values of <City>
<?xml version="1.0" encoding="UTF-8"?>
<Workers>
<Worker>
<EmpID>12345</EmpID>
<City>NYC</City>
<Allowance>
<Type>Meal</Type>
<Amount>150</Amount>
</Allowance>
<Allowance>
<Type>Gym</Type>
<Amount>200</Amount>
</Allowance>
</Worker>
<Worker>
<EmpID>56789</EmpID>
<City>SFO</City>
<Base>
<BaseType>General</BaseType>
<BaseAmount>1000</BaseAmount>
</Base>
</Worker>
<Worker>
<EmpID>18978</EmpID>
<City>LAX</City>
<Base>
<BaseType>General</BaseType>
<BaseAmount>3000</BaseAmount>
</Base>
</Worker>
</Workers>
I'm attempting to transform as below. Transformation doesn't need be to applied if the value of <City> is either NYC or SFO
<?xml version="1.0" encoding="UTF-8"?>
<Root>
<SOAP-ENV:Body xmlns:SOAP-ENV="http://www.w3.org/2001/12/soap-envelope">
<m:GetQuotationResponse xmlns:m = "http://www.example.com">
<m:Worker>12345</m:Worker>
<m:Location>NYC</m:Location>
<m:Expense>
<m:ExpenseType>Meal</m:ExpenseType>
<m:Amount>150</m:Amount>
</m:Expense>
<m:Expense>
<m:ExpenseType>Gym</m:ExpenseType>
<m:Amount>200</m:Amount>
</m:Expense>
</m:GetQuotationResponse>
</SOAP-ENV:Body>
<SOAP-ENV:Body xmlns:SOAP-ENV="http://www.w3.org/2001/12/soap-envelope">
<m:GetQuotationResponse xmlns:m = "http://www.example.com">
<m:Worker>56789</m:Worker>
<m:Location>SFO</m:Location>
<m:Expense>
<m:ExpenseType>General</m:ExpenseType>
<m:Amount>1000</m:Amount>
</m:Expense>
</m:GetQuotationResponse>
</SOAP-ENV:Body>
</Root>
This is my attempt
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:SOAP-ENV = "http://www.w3.org/2001/12/soap-envelope"
xmlns:m = "http://www.example.com"
exclude-result-prefixes="xs m SOAP-ENV"
version="2.0">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="Worker[City='NYC']">
<Root>
<SOAP-ENV:Body xmlns:m = "http://www.example.com">
<m:GetQuotationResponse>
<m:Worker><xsl:value-of select="EmpID"/></m:Worker>
<m:Location><xsl:value-of select="City"/></m:Location>
<xsl:for-each select="Allowance">
<m:Expense>
<m:ExpenseType><xsl:value-of select="Type"/></m:ExpenseType>
<m:Amount><xsl:value-of select="Amount"/></m:Amount>
</m:Expense>
</xsl:for-each>
</m:GetQuotationResponse>
</SOAP-ENV:Body>
</Root>
</xsl:template>
<xsl:template match="Worker[City='SFO']">
<Root>
<SOAP-ENV:Body xmlns:m = "http://www.example.com">
<m:GetQuotationResponse>
<m:Worker><xsl:value-of select="EmpID"/></m:Worker>
<m:Location><xsl:value-of select="City"/></m:Location>
<xsl:for-each select="Base">
<m:Expense>
<m:ExpenseType><xsl:value-of select="BaseType"/></m:ExpenseType>
<m:Amount><xsl:value-of select="BaseAmount"/></m:Amount>
</m:Expense>
</xsl:for-each>
</m:GetQuotationResponse>
</SOAP-ENV:Body>
</Root>
</xsl:template>
</xsl:stylesheet>
I have two issues(or more)
Couldn't get <Root> as the Parent node
Templates which are not matching values of <City> also returned. I wanted to match only <xsl:template match="Worker[City='NYC']"> or <xsl:template match="Worker[City='SFO']">
Current Output
<?xml version="1.0" encoding="UTF-8"?>
<Root>
<SOAP-ENV:Body xmlns:SOAP-ENV="http://www.w3.org/2001/12/soap-envelope">
<m:GetQuotationResponse xmlns:m="http://www.example.com">
<m:Worker>12345</m:Worker>
<m:Location>NYC</m:Location>
<m:Expense>
<m:ExpenseType>Meal</m:ExpenseType>
<m:Amount>150</m:Amount>
</m:Expense>
<m:Expense>
<m:ExpenseType>Gym</m:ExpenseType>
<m:Amount>200</m:Amount>
</m:Expense>
</m:GetQuotationResponse>
</SOAP-ENV:Body>
</Root>
<Root>
<SOAP-ENV:Body xmlns:SOAP-ENV="http://www.w3.org/2001/12/soap-envelope">
<m:GetQuotationResponse xmlns:m="http://www.example.com">
<m:Worker>56789</m:Worker>
<m:Location>SFO</m:Location>
<m:Expense>
<m:ExpenseType>General</m:ExpenseType>
<m:Amount>1000</m:Amount>
</m:Expense>
</m:GetQuotationResponse>
</SOAP-ENV:Body>
</Root>
18978
LAX
General
3000
Any help is appreciated to get this working using xslt 2.0 or xslt 3.0. Thank you
I'm posting the first solution that Martin Honnen has suggested.
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:SOAP-ENV = "http://www.w3.org/2001/12/soap-envelope"
xmlns:m = "http://www.example.com"
exclude-result-prefixes="xs m SOAP-ENV"
version="2.0">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="Workers">
<Root>
<xsl:apply-templates/>
</Root>
</xsl:template>
<xsl:template match="Worker[City='NYC']">
<SOAP-ENV:Body xmlns:m = "http://www.example.com">
<m:GetQuotationResponse>
<m:Worker><xsl:value-of select="EmpID"/></m:Worker>
<m:Location><xsl:value-of select="City"/></m:Location>
<xsl:for-each select="Allowance">
<m:Expense>
<m:ExpenseType><xsl:value-of select="Type"/></m:ExpenseType>
<m:Amount><xsl:value-of select="Amount"/></m:Amount>
</m:Expense>
</xsl:for-each>
</m:GetQuotationResponse>
</SOAP-ENV:Body>
</xsl:template>
<xsl:template match="Worker[City='SFO']">
<SOAP-ENV:Body xmlns:m = "http://www.example.com">
<m:GetQuotationResponse>
<m:Worker><xsl:value-of select="EmpID"/></m:Worker>
<m:Location><xsl:value-of select="City"/></m:Location>
<xsl:for-each select="Base">
<m:Expense>
<m:ExpenseType><xsl:value-of select="BaseType"/></m:ExpenseType>
<m:Amount><xsl:value-of select="BaseAmount"/></m:Amount>
</m:Expense>
</xsl:for-each>
</m:GetQuotationResponse>
</SOAP-ENV:Body>
</xsl:template>
<xsl:template match="Worker[not(City = ('SFO', 'NYC'))]"/>
</xsl:stylesheet>
Here is what alternate solution returns. I'm not sure how this solution can be modified to get expected output since City='SFO' has different sibling node <Base> than City='NYC'
<?xml version="1.0" encoding="UTF-8"?>
<Root>
<SOAP-ENV:Body xmlns:SOAP-ENV="http://www.w3.org/2001/12/soap-envelope">
<m:GetQuotationResponse xmlns:m="http://www.example.com">
<m:Worker>12345</m:Worker>
<m:Location>NYC</m:Location>
<m:Expense>
<m:ExpenseType>Meal</m:ExpenseType>
<m:Amount>150</m:Amount>
</m:Expense>
<m:Expense>
<m:ExpenseType>Gym</m:ExpenseType>
<m:Amount>200</m:Amount>
</m:Expense>
</m:GetQuotationResponse>
</SOAP-ENV:Body>
<SOAP-ENV:Body xmlns:SOAP-ENV="http://www.w3.org/2001/12/soap-envelope">
<m:GetQuotationResponse xmlns:m="http://www.example.com">
<m:Worker>56789</m:Worker>
<m:Location>SFO</m:Location>
</m:GetQuotationResponse>
</SOAP-ENV:Body>
</Root>
Following part is missing from the output
<m:Expense>
<m:ExpenseType>General</m:ExpenseType>
<m:Amount>1000</m:Amount>
</m:Expense>
Alternate solution suggested by #Martin Honnen with some minor tweaks also provide desired output.
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:SOAP-ENV = "http://www.w3.org/2001/12/soap-envelope"
xmlns:m = "http://www.example.com"
exclude-result-prefixes="xs m SOAP-ENV"
version="2.0">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="Workers">
<Root>
<xsl:apply-templates select="Worker[City = ('SFO', 'NYC')]"/>
</Root>
</xsl:template>
<xsl:template match="Worker">
<SOAP-ENV:Body xmlns:m = "http://www.example.com">
<m:GetQuotationResponse>
<m:Worker><xsl:value-of select="EmpID"/></m:Worker>
<m:Location><xsl:value-of select="City"/></m:Location>
<xsl:for-each select="Allowance">
<m:Expense>
<m:ExpenseType><xsl:value-of select="Type"/></m:ExpenseType>
<m:Amount><xsl:value-of select="Amount"/></m:Amount>
</m:Expense>
</xsl:for-each>
<xsl:for-each select="Base"> <!-- This part was included to get desired output without having to use more than one templates -->
<m:Expense>
<m:ExpenseType><xsl:value-of select="BaseType"/></m:ExpenseType>
<m:Amount><xsl:value-of select="BaseAmount"/></m:Amount>
</m:Expense>
</xsl:for-each>
</m:GetQuotationResponse>
</SOAP-ENV:Body>
</xsl:template>
</xsl:stylesheet>

Answer 1

Start with a template
<xsl:template match="Workers">
<Root>
<xsl:apply-templates/>
</Root>
</xsl:template>
then map your selected Workers to a SOAP body with a single template using e.g. <xsl:template match="Worker[City = ('SFO', 'NYC')]"> or <xsl:template match="Worker[City = 'SFO'] | Worker[City = 'NYC']">, if you prefer.
For other Workers, set up an empty template e.g. <xsl:template match="Worker[not(City = ('SFO', 'NYC'))]"/>.
As an alternative, you can of course just use a template matching Worker to map to a SOAP body and make your desired selection in the apply-templates of the first template I have show, i.e. change that to <xsl:apply-templates select="Worker[City = ('SFO', 'NYC')]"/>, that way you also ensure that only the wanted Workers are processed e.g.
<xsl:template match="Workers">
<Root>
<xsl:apply-templates select="Worker[City = ('SFO', 'NYC')]"/>
</Root>
</xsl:template>
<xsl:template match="Worker">
<SOAP-ENV:Body xmlns:m = "http://www.example.com">
<m:GetQuotationResponse>
<m:Worker><xsl:value-of select="EmpID"/></m:Worker>
<m:Location><xsl:value-of select="City"/></m:Location>
<xsl:for-each select="Allowance">
<m:Expense>
<m:ExpenseType><xsl:value-of select="Type"/></m:ExpenseType>
<m:Amount><xsl:value-of select="Amount"/></m:Amount>
</m:Expense>
</xsl:for-each>
</m:GetQuotationResponse>
</SOAP-ENV:Body>
</xsl:template>