The following function returns the list of integers in the range 1 to
2nd argument that are missing from the first argument.
<xsl:function name="my:missing">
<xsl:param name="numbers" as="xs:integer*"/>
<xsl:param name="max" as="xs:integer"/>
<xsl:choose>
<xsl:when test="$max = 0">
<xsl:value-of select="()"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of
select="(my:missing($numbers,$max - 1),
(if( index-of($numbers,$max) ) then () else $max))"/>
</xsl:otherwise>
</xsl:choose>
</xsl:function>
In your stylesheet you might call it like so:
<xsl:text>Missing from series: </xsl:text>
<xsl:value-of
select="my:missing(current-group()/series/@number,current-group()[last()]/series/@number)"/>
Real numbers in the 1st argument won't matter since the function tests
for integers only.
-W
On Sun, Apr 4, 2010 at 6:28 PM, Kevin Grover <kevin(_at_)kevingrover(_dot_)net>
wrote:
Using XSLT 2, I'm trying to read through a list of books that I keep
in XML. I want to get
the last book that I've read in each series.
I tried to use XML groups and get the last() item, but it's not
working as I expected: it always comes up as the first book in the
series.
What I'm a going wrong?
As an aside, I eventually also want to look through the books for
missing books (starting with 1 and ignoring any series with a
non-integer number, like "3.5" -- which I use to represent a short
story that comes in the storyline at that point.) NOTE: Since I could
not get the last number in the series, I have not even attempted this
in the XSLT file yet.
I've included some sample files at the end of the text: text.xml (the
input) and toread.xsl (the XSLT).
This is the command I'm using:
java -jar saxon9he.jar -s test.xml -o toread.txt toread.xsl
I've included the received output (toread.txt) and the expected output
(toread-expected.txt).
Any pointers appreciated. Thanks.
Files (preceded by '***** FILENAME')
***** text.xml
<?xml version="1.0" encoding='utf-8'?>
<?oxygen RNGSchema="schema/books.rnc" type="compact"?>
<booklist owner="Kevin Grover" cre-date="1991-01-05" mod-date="2010-04-04">
<author>
<name file-as="Adams, Douglas">Douglas Adams</name>
<book>
<title>Hitchhiker's Guide to the Galaxy</title>
<date>1980</date>
<owner>KOG</owner>
<date-read>1984</date-read>
<date-read>1999-06</date-read>
<genre>Comedy</genre>
<genre>SciFi</genre>
<type>book/paperback</type>
<series title="Hitchhiker Series" number="1" />
<comment>Funny!</comment>
</book>
<book>
<title>The Restaurant at the End of the Universe</title>
<date>1980</date>
<owner>KOG</owner>
<date-read>1984</date-read>
<genre>Comedy</genre>
<genre>SciFi</genre>
<series title="Hitchhiker Series" number="2" />
<comment>Funny!</comment>
</book>
<book>
<title>Life, the Universe and Everything</title>
<date>1982</date>
<owner>KOG</owner>
<date-read>1984</date-read>
<genre>Comedy</genre>
<genre>SciFi</genre>
<series title="Hitchhiker Series" number="3" />
<comment>Funny!</comment>
</book>
<book>
<title>So Long and Thanks for all the Fish</title>
<date>1999</date>
<owner>KOG</owner>
<date-read>1999</date-read>
<genre>Comedy</genre>
<genre>SciFi</genre>
<isbn>0-345-39183-7</isbn>
<series title="Hitchhiker Series" number="4" />
</book>
</author>
<author>
<name file-as="Anderson, Kevin J.">Kevin J. Anderson</name>
<book>
<title>Identity Crisis</title>
<date>2000</date>
<owner>FWS</owner>
<date-read>2002-03</date-read>
<genre>SciFi</genre>
<comment>Good. Downloaded from Fictionwise.com</comment>
</book>
<book>
<title>Hopscotch</title>
<date>2003</date>
<owner>GET</owner>
<genre>SciFi</genre>
<comment>Elaboration of 'Identity Crisis' theme: personality
transference.</comment>
</book>
</author>
<author>
<name file-as="Anthony, Piers">Piers Anthony</name>
<book>
<title>The Source of Magic</title>
<date>1979</date>
<owner>KOG</owner>
<date-read>1988</date-read>
<genre>Fantasy</genre>
<type>book/paperback</type>
<series title="The Magic of Xanth" number="2" />
</book>
<book>
<title>Castle Roogna</title>
<date>1979</date>
<owner>KOG</owner>
<date-read>1988</date-read>
<genre>Fantasy</genre>
<type>book/paperback</type>
<series title="The Magic of Xanth" number="3" />
</book>
<book>
<title>Ogre, Ogre</title>
<date>1982</date>
<owner>KOG</owner>
<date-read>1988</date-read>
<genre>Fantasy</genre>
<type>book/paperback</type>
<series title="The Magic of Xanth" number="5" />
</book>
<book>
<title>Night Mare</title>
<date>1982</date>
<owner>KOG</owner>
<date-read>1988</date-read>
<genre>Fantasy</genre>
<type>book/paperback</type>
<series title="The Magic of Xanth" number="6" />
</book>
</author>
</booklist>
<!--
Local Variables:
mode: nxml
mode: auto-fill
mode: flyspell
End:
-->
***** toread.xsl
<?xml version="1.0"?>
<!-- from article: http://www.xml.com/pub/a/2003/11/05/tr.html -->
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
version="2.0">
<xsl:output method="text"/>
<!-- ********************************************* -->
<xsl:template match="/">
<xsl:text>Last books read in each series.
</xsl:text>
<!-- TODO: Add date(file), date(current), vcsversion, ..? -->
<xsl:apply-templates select="/booklist/author"/>
</xsl:template>
<!-- ********************************************* -->
<xsl:template match="author">
<xsl:for-each-group
select="book[series and date-read]"
group-by="series/@title">
<xsl:text>
-------------------------------------------------------
</xsl:text>
<xsl:text>Series: </xsl:text>
<xsl:value-of select="current-grouping-key()"/>
<xsl:text>; Author: </xsl:text>
<xsl:value-of select="../name/text()"/>
<xsl:text>
</xsl:text>
<!-- Last book in series -->
<!-- TODO: this is incorrect, it's the first book in the series -->
<xsl:text>Last Book Read: </xsl:text>
<xsl:value-of select=".[last()]/title"/>
<xsl:text>, #</xsl:text>
<!-- Number in series -->
<!-- TODO: This is incorrect, it always 1 -->
<xsl:value-of select=".[last()]/series/@number"/>
<!-- TODO: if there are missing books in the series, put them here.
e.g. if I read 3-6 then last read is 6 and missing are
1 and 2 -->
<xsl:text>
</xsl:text>
</xsl:for-each-group>
</xsl:template>
</xsl:stylesheet>
***** toread.txt
Last books read in each series.
-------------------------------------------------------
Series: Hitchhiker Series; Author: Douglas Adams
Last Book Read: Hitchhiker's Guide to the Galaxy, #1
-------------------------------------------------------
Series: The Magic of Xanth; Author: Piers Anthony
Last Book Read: A Spell for Chameleon, #1
***** toread-expected.txt
Last books read in each series.
-------------------------------------------------------
Series: Hitchhiker Series; Author: Douglas Adams
Last Book Read: So Long and Thanks for all the Fish, #4
-------------------------------------------------------
Series: The Magic of Xanth; Author: Piers Anthony
Last Book Read: Night Mare, #6
Missing: #1, #4
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