Subject: Re: [xsl] Multiple replace() in XSLT 2 From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Sat, 18 May 2019 20:21:46 -0000 |
This was an XSLT 1.0 recursive solution: https://stackoverflow.com/a/5283744/36305 Based on this algorithm one can produce a non-recursive XSLT 2.0 solution (and even a single XPath 2 expression). Here is a first, non-polished but working non-recursive MultiReplace implementation in XSLT 2.0 -- just 58 lines and well-formatted. This implementation also solves the problem of overlapping replacement patterns: <xsl:stylesheet version="2.0" xmlns:xsl=" http://www.w3.org/1999/XSL/Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:my="my:my"> <xsl:output omit-xml-declaration="yes" indent="yes"/> <xsl:strip-space elements="*"/> <my:params xml:space="preserve"> <pattern> <old>corelation</old> <new>dependency</new> </pattern> <pattern> <old>relation</old> <new>tie</new> </pattern> <pattern> <old>
</old> <new><br/></new> </pattern> <pattern> <old>quick</old> <new>slow</new> </pattern> <pattern> <old>fox</old> <new>elephant</new> </pattern> <pattern> <old>brown</old> <new>white</new> </pattern> </my:params> <xsl:variable name="vPatterns" select="document('')/*/my:params/*"/> <xsl:template match="/"> <xsl:sequence select="my:MultuReplace(/*)"/> </xsl:template> <xsl:function name="my:MultuReplace"> <xsl:param name="pText" as="xs:string*"/> <xsl:variable name="vStartingIndexes" select= "for $ind in 1 to string-length($pText), $hasMatchingPattern in exists($vPatterns[starts-with(substring($pText, $ind), old)]) return $ind[$hasMatchingPattern] "/> <xsl:variable name="actualIndexes" select= "for $ind in $vStartingIndexes return $ind [position() = 1 or (for $pos in position()[position() > 1], $prevInd in $vStartingIndexes[$pos -1], $prevReplacementLength in string-length($vPatterns[starts-with(substring($pText, $prevInd), old)][1]/old) return $prevReplacementLength le $ind - $prevInd ) ] "/> <xsl:variable name="vResultSequence" as="xs:string*"> <xsl:sequence select= "for $pos in 1 to count($actualIndexes), $indRepl in $actualIndexes[$pos], $startUnprocessedText in (if($pos = 1) then 1 else (for $indLastReplacedText in $actualIndexes[$pos -1], $last-replacedText in $vPatterns[starts-with(substring($pText, $indLastReplacedText), old)][1]/old, $lastReplacementLength in string-length($last-replacedText) return $actualIndexes[$pos -1] + string-length($last-replacedText) ) ) return ( concat( substring($pText, $startUnprocessedText, $indRepl - $startUnprocessedText), $vPatterns[starts-with(substring($pText, $indRepl), old)][1]/new/string() ) ) "/> <xsl:sequence select= "for $lastReplIndex in $actualIndexes[last()], $last-replacedText in $vPatterns[starts-with(substring($pText, $lastReplIndex), old)][1]/old, $lastReplacementLength in string-length($last-replacedText) return substring($pText, $lastReplIndex + $lastReplacementLength) "/> </xsl:variable> <xsl:sequence select="string-join($vResultSequence, '')"/> </xsl:function> </xsl:stylesheet> When this transformation is applied on this source XML document: <t>a corelation between a quick brown fox and a dog</t> the wanted result is produced: *a dependency between a slow white elephant and a dog* Cheers, Dimitre On Thu, May 16, 2019 at 12:49 PM Dimitre Novatchev dnovatchev@xxxxxxxxx < xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > https://stackoverflow.com/a/5283744/36305 > > Cheers, > Dimitre > > On Thu, May 16, 2019 at 11:59 AM Rick Quatro rick@xxxxxxxxxxxxxx < > xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > >> Hi, >> >> >> >> I have a look up file of find/change pairs that I have to apply to a text >> node in my XML document. I am using XSLT 2. Here is an example of the >> lookup file: >> >> >> >> <?xml version="1.0" encoding="UTF-8"?> >> <findchange_lookup> >> <findchange find="Eicas" change="EICAS"/> >> <findchange find="Ulb" change="ULB"/> >> </findchange_lookup> >> >> I am reading this in as a global variable, but I am not sure the best >> approach for doing multiple replacements on the node. I can use recursion >> like in XSLT 1, but I can't think of how to do this in XSLT 2. There could >> be any number of <findchange> elements in my lookup file. Any pointers >> would be appreciated. Thank you very much. >> >> >> >> Rick >> >> >> >> Rick Quatro >> >> Carmen Publishing Inc. >> >> rick@xxxxxxxxxxxxxxx >> >> 585-729-6746 >> >> www.frameexpert.com/store/ >> >> >> >> >> >> >> >> >> XSL-List info and archive <http://www.mulberrytech.com/xsl/xsl-list> >> EasyUnsubscribe <http://lists.mulberrytech.com/unsub/xsl-list/782854> (by >> email) >> > > > XSL-List info and archive <http://www.mulberrytech.com/xsl/xsl-list> > EasyUnsubscribe <http://lists.mulberrytech.com/unsub/xsl-list/782854> (by > email <>) > -- Cheers, Dimitre Novatchev --------------------------------------- Truly great madness cannot be achieved without significant intelligence. --------------------------------------- To invent, you need a good imagination and a pile of junk ------------------------------------- Never fight an inanimate object ------------------------------------- To avoid situations in which you might make mistakes may be the biggest mistake of all ------------------------------------ Quality means doing it right when no one is looking. ------------------------------------- You've achieved success in your field when you don't know whether what you're doing is work or play ------------------------------------- To achieve the impossible dream, try going to sleep. ------------------------------------- Facts do not cease to exist because they are ignored. ------------------------------------- Typing monkeys will write all Shakespeare's works in 200yrs.Will they write all patents, too? :) ------------------------------------- Sanity is madness put to good use. ------------------------------------- I finally figured out the only reason to be alive is to enjoy it.
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