Subject: [xsl] Recursive grouping won't recurse... From: "Hunsberger, Peter" <Peter.Hunsberger@xxxxxxxxxx> Date: Thu, 4 Jul 2002 12:15:21 -0500 |
I'm still shaky on grouping with keys so I've probably missed something obvious, but I can't get a grouping to work when it has to group on a recursive structure. The input looks essentially like the following: <list> <a type="1" flag="false"/> <b type="2" flag="false"/> <c type="3" flag="false"> <d type="4" flag="true"/> <e type="4" flag="true"/> <f type="5" flag="true"/> <g type="5" flag="true"/> </c> </list> <list> <a type="1" flag="false"/> <b type="2" flag="false"/> <c type="3" flag="false"> <d type="7" flag="false"> <e type="4" flag="true"/> <e type="4" flag="true"/> </d> </c> </list> Where, if there are adjacent nodes with the same type than the flag will be true, otherwise the flag will always be false. It could be possible for adjacent nodes to have the same type with the flag set to false. The same structure could go many more levels deep than shown here. The desired output is <list> <a type="1" flag="false"/> <b type="2" flag="false"/> <c type="3" flag="false"> <group> <d type="4" flag="true"/> <e type="4" flag="true"/> </group> <group> <f type="5" flag="true"/> <g type="5" flag="true"/> </group> </c> </list> <list> <a type="1" flag="false"/> <b type="2" flag="false"/> <c type="3" flag="false"> <d type="7" flag="false"> <group> <e type="4" flag="true"/> <e type="4" flag="true"/> </group> </d> </c> </list> Where any adjacent nodes of the same type and with "flag" = true are enclosed in a group. The XSLT I have resembles the following (extracted from a larger XSLT with other things going on): <xsl:key select="." name="menus" match="*" use="@type"/> <xsl:template match="list"> <xsl:apply-templates select="." mode="menu"/> </xsl:template> <xsl:template match="*" mode="menu"> <xsl:for-each select="*[generate-id() = generate-id(key('menus', @type))]"> <xsl:choose> <xsl:when test="@flag='true'"> <group> <xsl:copy select="."> <xsl:apply-templates select="@* | text()"/> <xsl:apply-templates select="." mode="menu"/> </xsl:copy> <xsl:for-each select="current()/following-sibling::*[current()/@type = @type]"> <xsl:copy select="current()"> <xsl:apply-templates select="@* | text()"/> <xsl:apply-templates select="." mode="menu"/> </xsl:copy> </xsl:for-each> </group> </xsl:when> <xsl:otherwise> <xsl:copy select="."> <xsl:apply-templates select="@* | text()"/> <xsl:apply-templates select="." mode="menu"/> </xsl:copy> <xsl:for-each select="current()/following-sibling::*[current()/@type = @type]"> <xsl:copy select="current()"> <xsl:apply-templates select="@* | text()"/> <xsl:apply-templates select="." mode="menu"/> </xsl:copy> </xsl:for-each> </xsl:otherwise> </xsl:choose> </xsl:for-each> </xsl:template> This will produce the desired results for a first level group (as in the first list), but does not produce the desired results for a second level group (as in the second list). The issue is, I'm sure, with the way the key works, but I'm not clear what the problem is? I've also tried doing the same thing with using named templates instead of modes with the same results. I'll have to add additional case handling templates once I've got this working so I'd rather stick with modes if possible... BTW, is there a nice way to say "self and siblings" so that you don't have to copy the current node and then copy the siblings? Peter Hunsberger Phone: 901-495-5252 E-mail: Peter.Hunsberger@xxxxxxxxxx XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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