xsl:for-each loop with attribute matching with parameter - xslt

Question

I've been trying to figure this our for a while, but no luck.
I have a for each loop specifically targeting to a node with specific attributes, but somehow the for each condition doesn't seem to work.
I have the following xml
<?xml version="1.0" encoding="UTF-8"?>
<application-template xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<config>
<env value="testing">
<subEnv value="env">
<group value="group2s">
<group value="group2as">
<prop value="group2Props">group2PropValues</prop>
</group>
</group>
</subEnv>
<subEnv value="misc1">
<group value="group2s">
<group value="group2as">
<prop value="group2Props">group2sPropValues</prop>
</group>
</group>
<group value="group2s1">
<group value="group2as1">
<prop value="group2Props">group2s1PropValues</prop>
</group>
</group>
</subEnv>
</env>
<env value="testingA">
<subEnv value="env">
<group value="test2">
<group value="test2a">
<group value="test2ab">
<prop value="group2Props">testingAGroup2PropValues</prop>
</group>
</group>
</group>
</subEnv>
</env>
</config>
</application-template>
with the following xsl
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format">
<xsl:param name="inputEnv"/>
<xsl:variable name="env" select="/application-template/config/env[#value=$inputEnv]"/>
<xsl:strip-space elements="*"/>
<xsl:output method="text" indent="no"/>
<xsl:template match="/">
<xsl:call-template name="ou">
<xsl:with-param name="subEnvPos" select="$env/subEnv"/>
<xsl:with-param name="subEnvValue" select="$env/subEnv/#value"/>
</xsl:call-template>
</xsl:template>
<xsl:template name="ou">
<xsl:param name="subEnvPos"/>
<xsl:param name="subEnvValue"/>
<xsl:variable name="test" select="/application-template/config/env[#value=$inputEnv]/subEnv[#value=$subEnvValue]"/>
<xsl:for-each select="$test/group">
testing1:
<xsl:value-of select="$test"/>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
The param inputEnv is "testing" and the param $subEnvValue is "env". The output I got is
testing1:group2PropValues
testing1:group2PropValues
testing1:group2PropValues
testing1:group2PropValues
But I want to just loop once since the the condition is to match the subenv node = $subEnvValue (which is "env"). The output I'm hoping for is
testing1:group2PropValues

Answer 1

I think that instead of your current code:
<xsl:template match="/">
<xsl:call-template name="ou">
<xsl:with-param name="subEnvPos"
select="$env/subEnv"/>
<xsl:with-param name="subEnvValue"
select="$env/subEnv/#value"/>
</xsl:call-template>
</xsl:template>
you want something like this:
<xsl:template match="/">
<xsl:call-template name="ou">
<xsl:with-param name="subEnvPos"
select="$env/subEnv[1]"/>
<xsl:with-param name="subEnvValue"
select="$env/subEnv[1]/#value"/>
</xsl:call-template>
</xsl:template>
With this modification, the complete XSLT code now is:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format">
<xsl:param name="inputEnv" select="'testing'"/>
<xsl:variable name="env" select=
"/application-template/config/env[#value=$inputEnv]"/>
<xsl:strip-space elements="*"/>
<xsl:output method="text" indent="no"/>
<xsl:template match="/">
<xsl:call-template name="ou">
<xsl:with-param name="subEnvPos"
select="$env/subEnv[1]"/>
<xsl:with-param name="subEnvValue"
select="$env/subEnv[1]/#value"/>
</xsl:call-template>
</xsl:template>
<xsl:template name="ou">
<xsl:param name="subEnvPos"/>
<xsl:param name="subEnvValue"/>
<xsl:variable name="test" select=
"/application-template/config/env
[#value=$inputEnv]/subEnv[#value=$subEnvValue]"/>
<xsl:for-each select="$test/group">
testing1:
<xsl:value-of select="$test"/>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
and when applied to the provided XML document:
<application-template xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<config>
<env value="testing">
<subEnv value="env">
<group value="group2s">
<group value="group2as">
<group value="group2bs">
<prop value="group2Props">group2PropValues</prop>
</group>
</group>
</group>
</subEnv>
<subEnv value="misc1">
<group value="group2s">
<group value="group2as">
<group value="group2bs">
<prop value="group2Props">group2sPropValues</prop>
</group>
</group>
</group>
<group value="group2s1">
<group value="group2as1">
<group value="group2bs1">
<prop value="group2Props">group2s1PropValues</prop>
</group>
</group>
</group>
</subEnv>
<subEnv value="misc2">
<group value="group2sMisc2">
<group value="group2asMisc2">
<group value="group2bsMisc2">
<prop value="group2Props">group2PropValuesMisc2</prop>
</group>
</group>
</group>
</subEnv>
</env>
</config>
</application-template>
the wanted result is produced:
testing1:
group2PropValues
Update:
After the OP explained in a comment what he wants, here is a short and simple solution to the new problem:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text"/>
<xsl:strip-space elements="*"/>
<xsl:param name="vinputEnv" select="'testing'"/>
<xsl:template match="/*/*/env">
<xsl:if test="#value = $vinputEnv">
<xsl:for-each select="descendant::*[not(*)]">
<xsl:value-of select="concat('testing1: ', ., '
')"/>
</xsl:for-each>
</xsl:if>
</xsl:template>
</xsl:stylesheet>
When this transformation is applied to the provided XML document (above), the wanted, correct result is produced:
testing1: group2PropValues
testing1: group2sPropValues
testing1: group2s1PropValues
testing1: group2PropValuesMisc2