How to implement "if else if else" condition in XSLT

Question

Is it possible to implement "if else, if else" in xsl? for example I have data:

<document>
    <line>
        <name>MAR111</name>
        <value>1</value>
    </line>

    <line>
        <name>MAR111</name>
        <value>3</value>
    </line>
    <line>
        <name>MEA111</name>
        <value>1</value>
    </line>
    <line>
        <name>MPR111</name>
        <value>1</value>
    </line>
    <line>
        <name>MEA111</name>
        <value>4</value>
    </line>
    <line>
        <name>MPR111</name>
        <value>2</value>
    </line>
</document>

I need to get three document templates with three names:

<document>
    <MAR>
        <name>MAR111</name>
        <number>1</number>
        <number>4</number>
    </MAR>
</document>
<document>
    <MEA>
        <name>MEA111</name>
        <number>1</number>
        <number>4</number>
    </MEA>
</document>
<document>
    <MPR>
        <name>MPR111</name>
        <number>1</number>
        <number>2</number>
    </MPR>
</document>

I try to use "choose, when" on apply template, but maybe there is a better way:

<xsl:template match="/">
    <xsl:choose>
        <xsl:when test="/document/line/name='MEA111'">
            <xsl:apply-templates mode="MEA" select="/document"/>
        </xsl:when>
    </xsl:choose>
    <xsl:choose>
        <xsl:when test="/document/line/name='MPR111'">
            <xsl:apply-templates mode="MPR" select="/document"/>
        </xsl:when>
    </xsl:choose>
    <xsl:choose>
        <xsl:when test="/document/line/name='MAR111'">
            <xsl:apply-templates mode="MAR" select="/document"/>
        </xsl:when>
    </xsl:choose>
</xsl:template>

Check my answer for the correct XSLT way for doing this.

user357812
– user357812

2011-03-02 15:49:52 +00:00
Commented Mar 2, 2011 at 15:49 — user357812
– user357812, Commented Mar 2, 2011 at 15:49

linepogl · Accepted Answer · 2011-03-02 15:06:02Z

26

Actually you can merge them together:

<xsl:template match="/">
    <xsl:choose>
        <xsl:when test="/document/line/name='MEA111'">
            <xsl:apply-templates mode="MEA" select="/document"/>
        </xsl:when>
        <xsl:when test="/document/line/name='MPR111'">
            <xsl:apply-templates mode="MPR" select="/document"/>
        </xsl:when>
        <xsl:when test="/document/line/name='MAR111'">
            <xsl:apply-templates mode="MAR" select="/document"/>
        </xsl:when>
    </xsl:choose>
</xsl:template>

EDIT: Petras, after your clarification, it seems that what you want is even easier:

<xsl:template match="/">
    <xsl:if test="/document/line/name='MEA111'">
       <xsl:apply-templates mode="MEA" select="/document"/>
    </xsl:if>
    <xsl:if test="/document/line/name='MPR111'">
        <xsl:apply-templates mode="MPR" select="/document"/>
    </xsl:if>
    <xsl:if test="/document/line/name='MAR111'">
        <xsl:apply-templates mode="MAR" select="/document"/>
    </xsl:if>
</xsl:template>

edited Mar 2, 2011 at 15:06

answered Mar 2, 2011 at 14:54

linepogl

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1 Comment

Petras Over a year ago

But when we will get only one result of first condition which will be true. I need to get three result because all condition is correct

Alex Nikolaenkov · Accepted Answer · 2011-03-02 15:13:37Z

6

The best way is to use separate templates.

<xsl:template match="/document/line/name='MEA111'">
       <xsl:apply-templates mode="MEA" select="/document"/>
</xsl:template>

<xsl:template match="/document/line/name='MPR111'">
       <xsl:apply-templates mode="MPR" select="/document"/>
</xsl:template>

<xsl:template match="/document/line/name='MAR111'">
       <xsl:apply-templates mode="MAR" select="/document"/>
</xsl:template>

Even less lines and this is more maintainable.

answered Mar 2, 2011 at 15:13

Alex Nikolaenkov

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Comments

Armen Tsirunyan · Accepted Answer · 2011-03-02 14:52:05Z

5

No, choose when is the xsl way of saying if else. No better way

answered Mar 2, 2011 at 14:52

Armen Tsirunyan

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Comments

user357812 · Accepted Answer · 2011-03-02 15:49:19Z

This stylesheet:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:key name="kLineByName" match="line" use="name"/>
    <xsl:template match="line[count(.|key('kLineByName',name)[1]) = 1]">
        <document>
            <xsl:element name="{substring(name,1,3)}">
                <xsl:copy-of select="name|key('kLineByName',name)/value"/>
            </xsl:element>
        </document>
    </xsl:template>
    <xsl:template match="text()"/>
</xsl:stylesheet>

Output:

<document>
    <MAR>
        <name>MAR111</name>
        <value>1</value>
        <value>3</value>
    </MAR>
</document>
<document>
    <MEA>
        <name>MEA111</name>
        <value>1</value>
        <value>4</value>
    </MEA>
</document>
<document>
    <MPR>
        <name>MPR111</name>
        <value>1</value>
        <value>2</value>
    </MPR>
</document>

aaronbauman · Accepted Answer · 2012-12-06 18:08:29Z

2

if you want to implement a catch-all fall through (e.g. equivalent to "else"), you should use otherwise

answered Dec 6, 2012 at 18:08

aaronbauman

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Comments

markus0074 · Accepted Answer · 2014-05-14 15:25:04Z

1

Do you mean something like:

<xsl:choose>
  <xsl:when test="name() = 'MAR111'">
    ... do something ...
  </xsl:when>
  <xsl:otherwise>
    ... do something as fallback ...
  </xsl:otherwise>
</xsl:choose>

BR Markus

answered May 14, 2014 at 15:25

markus0074

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Comments

Draken · Accepted Answer · 2017-04-21 06:45:21Z

1

Yes, we can achieve things using <xsl:choose><xsl:when> but if, else if, condition is also supported in @select attribute of different xslt construct for example :

<xsl:value-of select="if (@geography = 'North America') then 
                 'Domestic car'
                else if (@geography = 'Europe') then 
                  'Import from Europe'
                else if (@geography = 'Asia') then 
                  &quot;It's from Asia&quot;
                (: If it's anything else :)
                else 
                   'We don''t know!'"/>

edited Apr 21, 2017 at 6:45

Draken

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answered Apr 21, 2017 at 6:15

Vivek Dhiman

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1 Comment

michael.hor257k Over a year ago

Requires XSLT 2.0.

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