CODEWITHSUNDEEP
xsltxpathxslt-1.0
Patan
Patan

Reputation: 17893

identifying the null element in XSLT which has no value even in child elements

checking for an Null element

<image><a><img src="abcd"/></a></image>

XSLT template:

<xsl:if test="image!=''">
IMAGE HAS TEXT OR INNER ELEMENT
</xsl:if>

I am getting blank output though the "image" element has child elements. and Ideally it is not null.

I have to check the condition that it should have value or the child elements. The child elements can be empty.

How to rectify this.

Thank you

Upvotes: 3

Views: 1840

Answers (3)

StuartLC
StuartLC

Reputation: 107317

You can use this to check for any child nodes (text, elements etc)

<xsl:template match="image">
    <xsl:if test="node()">
        IMAGE HAS TEXT OR INNER ELEMENT
    </xsl:if>
</xsl:template>

Or you can be more specific:

<xsl:template match="image">
    <xsl:if test="a | text()">
        IMAGE HAS TEXT OR INNER ELEMENT
    </xsl:if>
</xsl:template>

Upvotes: 0

Dimitre Novatchev
Dimitre Novatchev

Reputation: 243529

Use:

image[string() or node()]

This evaluates to true() only if there is at least one image child of the current node, such that its string value is non-empty, or it has children (or both).

This can be simplified just to:

 image[node()]

taking into account that in order to have string value, an element must have a text node descendant in its sub-tree.

If you want the string value of image (if any) to be not all-whitespace, modify the first of the above XPath expressions to:

image[normalize-space() or node()]

Upvotes: 5

Martin Honnen
Martin Honnen

Reputation: 167706

Use <xsl:if test="image/node()">...</xsl:if> to check whether the image element has any kind of child node or <xsl:if test="image/*">...</xsl:if> to test whether the image element has at least one child element.

Upvotes: 1

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