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Question

How I can repeat an action X times with XSLT

Answer 1

+2 A:

First, use templates instead of for-each, then you can use a recursive template call to emulate a for loop (as seen here):

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt;   
    <xsl:template match="/">
        <html>
        <body>

            <xsl:call-template name="selects">
               <xsl:with-param name="i">1</xsl:with-param>
               <xsl:with-param name="count">20</xsl:with-param>
            </xsl:call-template> 

        </body>    
        </html>
    </xsl:template>

    <xsl:template name="selects">
        <xsl:param name="i" />
        <xsl:param name="count" />

        <xsl:if test="$i &lt;= $count">
          <select name="values[]">
            <xsl:apply-template select="output/select" />
          </select?
        </xsl:if>

        <!--begin_: RepeatTheLoopUntilFinished-->
        <xsl:if test="$i &lt;= $count">
            <xsl:call-template name="selects">
                <xsl:with-param name="i">
                    <xsl:value-of select="$i + 1"/>
                </xsl:with-param>
                <xsl:with-param name="count">
                    <xsl:value-of select="$count"/>
                </xsl:with-param>
            </xsl:call-template>
        </xsl:if>

    </xsl:template>

    <xsl:template match="output/select">
      <option>
        <xsl:attribute name="value">
            <xsl:value-of select="id">
        </xsl:attribute>
        <xsl:value-of select="name" />
      </option>
    </xsl:template>
</xsl:stylesheet>

Oded 2010-09-27 08:46:53

Answer 2

+1 A:

One way to solve this is by loading the option settings into a variable using the XPath document() function and then using a recursive template:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt;

  <xsl:variable name="options" select="document('options.xml')" />

  <xsl:template match="/">
    <html>
      <body>
        <xsl:call-template name="InsertOptions">
          <xsl:with-param name="count" select="20" />
        </xsl:call-template>
      </body>
    </html>
  </xsl:template>

  <xsl:template name="InsertOptions">
    <xsl:param name="index" select="1"/>
    <xsl:param name="count" select="1"/>

    <xsl:if test="$index &lt;= $count">
      <select name="{concat('values', count, '[]')}">
        <option value="0"> </option>
        <xsl:for-each select="$options/output/select">
          <option value="{id}"><xsl:value-of select="name" /></option>
        </xsl:for-each>
      </select>
      <xsl:call-template name="InsertOptions">
        <xsl:with-param name="index" select="$index + 1" />
        <xsl:with-param name="count" select="$count" />
      </xsl:call-template>
    </xsl:if>
  </xsl:template>
</xsl:stylesheet>

0xA3 2010-09-27 08:53:42

Answer 3

+1 A:

I. XSLT 1.0 solution:

<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt;
 <xsl:output omit-xml-declaration="yes" indent="yes"/>
 <xsl:strip-space elements="*"/>

 <xsl:template match="/">
  <html>
    <body>
      <xsl:apply-templates select="*" mode="iter">
       <xsl:with-param name="pCount" select="20"/>
      </xsl:apply-templates>
    </body>
  </html>
 </xsl:template>

 <xsl:template match="/*" mode="iter">
  <xsl:param name="pCount" select="0"/>

  <xsl:if test="$pCount > 0">
      <select name="values[]">
      <xsl:apply-templates/>
      </select>
    <xsl:apply-templates select="." mode="iter">
      <xsl:with-param name="pCount" select="$pCount -1"/>
    </xsl:apply-templates>
  </xsl:if>
 </xsl:template>

 <xsl:template match="select">
  <option value="{id}"><xsl:value-of select="name"/></option>
 </xsl:template>
</xsl:stylesheet>

This is a specific, recursive solution.

When applied to the following XML document:

<output>
    <select>
        <id>0</id>
        <name> </name>
    </select>
    <select>
        <id>1</id>
        <name>One</name>
    </select>
    <select>
        <id>2</id>
        <name>Two</name>
    </select>
    <select>
        <id>3</id>
        <name>Three</name>
    </select>
</output>

the wanted, correct result is produced.

II. XSLT 2.0 solution using the f:repeat() function of FXSL:

<xsl:stylesheet version="2.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
 xmlns:xs="http://www.w3.org/2001/XMLSchema"
 xmlns:f="http://fxsl.sf.net/"
 exclude-result-prefixes="f xs"
 >
 <xsl:import href="../f/func-repeat.xsl"/>
 <xsl:output omit-xml-declaration="yes" indent="yes"/>

 <xsl:variable name="vSelects" as="element()">
   <select name="values[]">
    <xsl:apply-templates select="/*/select"/>
   </select>
 </xsl:variable>

  <xsl:template match="/">
    <html>
      <body>
       <xsl:sequence select="f:repeat($vSelects, 20)"/>
      </body>
    </html>
  </xsl:template>

 <xsl:template match="select">
  <option value="{id}"><xsl:value-of select="name"/></option>
 </xsl:template>
</xsl:stylesheet>

Here we use a very generic function that will repeat its first argument N (the value of its second argument) times.

The function f:repeat() itself is very simple:

<xsl:stylesheet version="2.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
 xmlns:xs="http://www.w3.org/2001/XMLSchema"
 xmlns:f="http://fxsl.sf.net/"
 exclude-result-prefixes="xs f"
>

  <xsl:function name="f:repeat" as="item()+">
    <xsl:param name="pThis" as="item()"/>
    <xsl:param name="pTimes" as="xs:integer"/>

    <xsl:for-each select="1 to $pTimes">
      <xsl:sequence select="$pThis"/>
    </xsl:for-each>
  </xsl:function>
</xsl:stylesheet>

Dimitre Novatchev 2010-09-27 13:37:50

Answer 4

+1 A:

Other solution with "you-will-go-to-hell-if-you-use-this-pattern":

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt;
    <xsl:template match="/">
        <xsl:variable name="vChilds" select="node()"/>
        <xsl:variable name="vStylesheet" select="document('')"/>
        <html>
            <body>
                <xsl:for-each select="($vStylesheet//node()|
                                       $vStylesheet//@*|
                                       $vStylesheet//namespace::*)
                                       [21 > position()]">
                    <xsl:apply-templates select="$vChilds"/>
                </xsl:for-each>
            </body>
        </html>
    </xsl:template>
    <xsl:template match="output">
        <select name="values[]">
            <option value="0"></option>
            <xsl:apply-templates/>
        </select>
    </xsl:template>
    <xsl:template match="select">
        <option value="{id}">
            <xsl:value-of select="name"/>
        </option>
    </xsl:template>
</xsl:stylesheet>

Alejandro 2010-09-27 14:43:51

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How I can repeat an action X times with XSLT

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