How to achieve dynamic binding

li72 · February 21st, 2008, 08:07 AM

Assuming we have an xml document like the one below.
<data>
   <node1 null="true" type="integer" />
   <node2 null="true" type="date" />
   <node3 null="false" type="string" />
   </data>
we need to transform this doc into XForms doc. The behaviour task in XForms is placed inside <model> </model> node.
If we write this part by hand, it looks like
<model>
<xforms:bind nodeset="node1" required="true()" type="xs:integer"/>
<xforms:bind nodeset="node2" required="true()" type="xs:date"/>
<xforms:bind nodeset="node3" required="false()" type="xs:string"/>
</model>
But I need to call a template which builds up this part dynamically. i.e. Xslt processor will visit each node in xml document, read its name as well as its attributes values (null, type), then construct the desired <model> node.

The main structure of this template could be like this
<xsl:template match="data">
  <xsl:for-each select="data/*">
    <xsl:value-of select="local-name()"/>
    <xsl:value-of select="@null" />
    <xsl:value-of select="@type" />

   </xsl:for-each>
  </xsl:template>
My question is how to build up a generic statement that generates the binding part?

Any help is much appreciated

samjudson · February 21st, 2008, 08:13 AM

Use the xsl:attribute instruction, something like the following:

<xforms:bind>
<xsl:attribute name="nodeset"><xsl:value-of select="local-name()"/></xsl:attribute>
<xsl:attribute name="required"><xsl:value-of select="@null"/>()</xsl:attribute>
<xsl:attribute name="type">xs:<xsl:value-of select="@type"/></xsl:attribute>
</xforms:bind>

/- Sam Judson : Wrox Technical Editor -/

li72 · February 21st, 2008, 10:26 AM

Hi.Samjudson
Thanks a lot for ur help
Actually I created the template below and it was called as <xsl:call-template name="templatename" />
The outcome of the translations was :
<xforms:bind nodeset="node3" required="false()" type="xs:string"/> which means we got only the last node produced by the template and we missed the first and second ones.

Any clue?
Many thanks in advance

Here is the template:
<xsl:template match="data" name="templatename">
<xforms:bind>
<xsl:for-each select="data/*">
<xsl:attribute name="nodeset"><xsl:value-of select="local-name()"/></xsl:attribute>
<xsl:attribute name="required"><xsl:value-of select="@null"/>()</xsl:attribute>
<xsl:attribute name="type">xs:<xsl:value-of select="@type"/></xsl:attribute>
</xsl:for-each>

</xforms:bind>
</xsl:template>

Martin Honnen · February 21st, 2008, 11:46 AM

You want one xforms:bind element for each child of the data element so you need to move the xforms:bind element inside of the for-each e.g.

Code:

<xsl:for-each select="data/*">
  <xforms:bind nodeset="{local-name()}"
               required="{@null}"
               type="{concat('xs:', @type)}"/>
</xsl:for-each>