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XSTL stylesheet workarounds for exceptions
- From: Jack Bush <netbeansfan@y...>
- To: xml-dev@l...
- Date: Mon, 9 Feb 2009 02:17:46 -0800 (PST)
Hi All,
I am unable to come up with a suitable workaround to kick in when an element is not available. Below are various approaches attempted without success:
Scenario |
|
A. |
<xsl:template match="/">
<area>
<xsl:apply-templates select="//ns:p"/>
<xsl:variable name="hobbie" select="ns:p[ns:strong='Hobbie:']"/>
<xsl:apply-templates select="$hobbie"/>
<xsl:choose>
<xsl:when test="empty($hobbie)">
<xsl:variable name="no_hobbie" select="true"/>
</xsl:when>
<xsl:otherwise>
<xsl:variable name="no_hobbie" select="false"/>
</xsl:otherwise>
</xsl:choose>
</area>
</xsl:template>
<xsl:if test="${no_hobbie} = 'false'">
<xsl:template match="ns:p[ns:strong='Hobbie:']">
<xsl:for-each select="text()[normalize-space() != '']">
<hobbie><xsl:value-of select="normalize-space()"/></hobbie>
</xsl:for-each>
</xsl:template>
</xsl:if>
|
Compilation error |
Error at xsl:if on line 35 column 41
XPST0003: XPath syntax error at char 1 on line 35 in {${no_hobbies}:
expected "<name>", found "{"
Error at xsl:if on line 35 column 41
XTSE0010: Element xsl:if must not appear directly within xsl:stylesheet
Warning: at xsl:variable on line 13 column 59
SXWN9001: A variable with no following sibling instructions has no effect
Warning: at xsl:variable on line 16 column 60
SXWN9001: A variable with no following sibling instructions has no effect
Error at xsl:template on line 36 column 53
XTSE0010: An xsl:if element must not contain an xsl:template element
Error at xsl:template on line 36 column 53
XTSE0010: Element must be used only at top level of stylesheet |
B. |
<xsl:template match="/">
<area>
<xsl:apply-templates select="//ns:p"/>
<xsl:variable name="hobbie" select="ns:p[ns:strong='Hobbie:']"/>
<xsl:apply-templates select="$hobbie"/>
<xsl:choose>
<xsl:when test="empty($hobbie)">
<hobbie>Unknown</hobbie>
</xsl:when>
<xsl:otherwise>
<xsl:template match="ns:p[ns:strong='Hobbie:']">
<xsl:for-each select="text()[normalize-space() != '']">
<hobbie><xsl:value-of select="normalize-space()"/></hobbie>
</xsl:for-each>
</xsl:template>
</xsl:otherwise>
</xsl:choose>
</area>
</xsl:template>
|
Compilation error |
Error at xsl:template on line 17 column 61
XTSE0010: An xsl:otherwise element must not contain an xsl:template element
Error at xsl:template on line 17 column 61
XTSE0010: Element must be used only at top level of stylesheet |
C. |
<xsl:template match="/">
<area>
<xsl:apply-templates select="//ns:p"/>
<xsl:variable name="hobbie" select="ns:p[ns:strong='Hobbie:']"/>
<xsl:apply-templates select="$hobbie"/>
<xsl:choose>
<xsl:when test="empty($hobbie)">
<hobbie>Unknown</hobbie>
</xsl:when>
<xsl:otherwise>
<xsl:call-template name="hobbie"/>
</xsl:otherwise>
</xsl:choose>
</area>
</xsl:template>
<xsl:template name="hobbie" match="ns:p[ns:strong='Hobbie:']">
<xsl:for-each select="text()[normalize-space() != '']">
<hobbie><xsl:value-of select="normalize-space()"/></hobbie>
</xsl:for-each>
</xsl:template>
|
Output |
<hobbie>fishing</hobbie> // should pick up the valid element if there is one exist.
<hobbie>Unknown</hobbie> // only create a default element value when no such element exist. |
D. |
<xsl:template match="/">
<area>
<xsl:apply-templates select="//ns:p"/>
<xsl:variable name="hobbie" select="ns:p[ns:strong='Hobbie:']"/>
<xsl:apply-templates select="$hobbie"/>
<xsl:if test="empty($hobbie)">
<hobbie>Unknown</hobbie>
</xsl:if>
</area>
</xsl:template>
<xsl:template match="ns:p[ns:strong='Hobbie:']">
<xsl:for-each select="text()[normalize-space() != '']">
<hobbie><xsl:value-of select="normalize-space()"/></hobbie>
</xsl:for-each>
</xsl:template>
|
Output |
<hobbie>fishing</hobbie> // should pick up the valid element if there is one exist.
<hobbie>Unknown</hobbie> // only create a default element value when no such element exist. |
I am very new XSLT and can do with some helpful suggestion.
Many thanks,
Jack
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