Re: [xsl] analyze-string regex

["Imsieke, Gerrit, le-tex" <gerrit.imsieke@xxxxxxxxx>]

Hi Peter,

You probably need to make all of the .* in the regex non-greedy (and 
restore flags="s").

Gerrit

On 26.03.2014 21:30, Rushforth, Peter wrote:
> Hi,
>
> I am trying to use xsl:analyze-string to process a json response, the model of which is fixed.
>
> The target environment is saxon-ce, but I am using oxygen to get things working.
>
> I was under the impression that the regex would perform multiple matches, allowing me to generate a sequence of elements from a string containing multiple objects that I match.  If that is true (the spec says it should be, I think), then my regex is faulty.  Could you offer any suggestions about the following, please?
>
> When I use dot-all mode (@flags="s"), I get a single <option> corresponding to the last object in the array.  When no flags, an empty sequence.  Any suggestions appreciated.
>
> My objective is to generate a sequence of <option> elements matching the json objects:
>
> xslt:
>
> <xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; xmlns:ex="http://example.org/namespace"; exclude-result-prefixes="ex">
>    <xsl:output method="xml" omit-xml-declaration="yes"/>
>    <xsl:template match="json">
>      <datalist>
>        <xsl:copy-of select="ex:json2Options(.)"/>
>      </datalist>
>    </xsl:template>
>    <xsl:function name="ex:json2Options">
>      <xsl:param name="json"/><!--           1       2                   3             4                              5                       6               7                        8            9              -->
>      <xsl:variable name="regexps" select="'(\{.*(&quot;title&quot;:.*&quot;(.*?)&quot;).*(&quot;qualifier&quot;:.*&quot;(.*?)&quot;).*(&quot;type&quot;:.*&quot;(.*?)&quot;).*(&quot;geometry&quot;:.*(\{.*?\})).*\}{1,})'"/>
>      <xsl:analyze-string select="$json" regex="{$regexps}">
>        <xsl:matching-substring>
>          <xsl:element name="option">
>            <xsl:attribute name="data-title" select="regex-group(3)"></xsl:attribute>
>            <xsl:attribute name="data-qualifier" select="regex-group(5)"/>
>            <xsl:attribute name="data-type" select="regex-group(7)"/>
>            <xsl:attribute name="data-geometry" select="regex-group(9)"/>
>            <xsl:value-of select="regex-group(3)"/>
>          </xsl:element>
>        </xsl:matching-substring>
>      </xsl:analyze-string>
>    </xsl:function>
> </xsl:stylesheet>
>
> Input document:
>
> <json>
> [
> {
>      "title": "Ottawa, Carleton, Ontario (Unincorporated area)",
>      "qualifier": "LOCATION",
>      "type": "Geoname",
>      "bbox": [-75.6903367156744, 45.373570070138, -75.6524412843256, 45.427540929862],
>      "geometry": {"type":"Point","coordinates":[-75.671387,45.400555]}
> },
> {
>      "title": "Ottawa, Carleton; Russell, Ontario (City)",
>      "qualifier": "LOCATION",
>      "type": "Geoname",
>      "bbox": [-76.3555857, 44.9617738, -75.2465783, 45.5376514],
>      "geometry": {"type":"Point","coordinates":[-75.58429,45.333389]}
> },
> {
>      "title": "031G OTTAWA",
>      "qualifier": "LOCATION",
>      "type": "NTS",
>      "bbox": [-76.0, 45.0, -74.0, 46.0],
>      "geometry": {"type":"Point","coordinates":[-75,45.5]}
> }]</json>
>
>
> Cheers, and thanks,
> Peter Rushforth

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Gerrit Imsieke
GeschC$ftsfC<hrer / Managing Director
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