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 | <?xml version="1.0"?>
 
<!--
   Merging two XML files
   Version 1.6
   LGPL (c) Oliver Becker, 2002-07-05
   obecker@informatik.hu-berlin.de
-->
 
<xslt:transform version="2.0" 
                xmlns:xslt="http://www.w3.org/1999/XSL/Transform"
                xmlns:m="http://informatik.hu-berlin.de/merge"
                exclude-result-prefixes="m" >
<xslt:output method="xml" indent="yes" use-character-maps="doctype"/>
<xslt:character-map name="doctype">
        <xslt:output-character character="" 
string="
<!DOCTYPE" />
        <xslt:output-character character="" string=">
" />
        <xslt:output-character character="
" string=" " />
    </xslt:character-map>
 
 
<!-- Normalize the contents of text, comment, and processing-instruction
     nodes before comparing?
     Default: yes -->
<xslt:param name="normalize" select="'yes'" />
 
<!-- Don't merge elements with this (qualified) name -->
<xslt:param name="dontmerge" />
 
<!-- If set to true, text nodes in file1 will be replaced -->
<xslt:param name="replace" select="false()" />
 
<!-- Variant 1: Source document looks like
     <?xml version="1.0"?>
     <merge xmlns="http://informatik.hu-berlin.de/merge">
        <file1>file1.xml</file1>
        <file2>file2.xml</file2>
     </merge>         
     The transformation sheet merges file1.xml and file2.xml.
-->
<xslt:template match="m:merge" >
   <xslt:variable name="file1" select="string(m:file1)" />
   <xslt:variable name="file2" select="string(m:file2)" />
   <xslt:message>
      <xslt:text />Merging '<xslt:value-of select="$file1" />
      <xslt:text />' and '<xslt:value-of select="$file2"/>'<xslt:text />
   </xslt:message>
   <xslt:if test="$file1='' or $file2=''">
      <xslt:message terminate="yes">
         <xslt:text>No files to merge specified</xslt:text>
      </xslt:message>
   </xslt:if>
   <xslt:call-template name="m:merge">
      <xslt:with-param name="nodes1" select="document($file1,/*)/node()" />
      <xslt:with-param name="nodes2" select="document($file2,/*)/node()" />
   </xslt:call-template>
</xslt:template>
 
 
<!-- Variant 2:
     The transformation sheet merges the source document with the
     document provided by the parameter "with".
-->
<xslt:param name="with" />
 
<xslt:template match="*">
   <xslt:if test="string($with)=''">
      <xslt:message terminate="yes">
        <xslt:text />Merging input with '<xslt:value-of select="$with"/>
        <xslt:text>'</xslt:text>
         <xslt:text>No input file specified (parameter 'with')</xslt:text>
      </xslt:message>
   </xslt:if>
   <xslt:value-of select="replace(
                unparsed-text(document-uri(/)), 
'.*?<!DOCTYPE([^>]+)>.*',
                '$1', 's')" /> 
 
 
        <xslt:comment>
                This is an automagically merged file.
                No need to edit, it will be reconstructed every time you build webapp.
                If you want some changes inside this file, edit the corresponding 
                source files.
                This was merged using '<xslt:value-of select="$with"/>'
        </xslt:comment>
   <xslt:call-template name="m:merge">
      <xslt:with-param name="nodes1" select="/node()" />
      <xslt:with-param name="nodes2" select="document($with,/*)/node()" />
   </xslt:call-template>
</xslt:template>
 
 
<!-- ============================================================== -->
 
<!-- The "merge" template -->
<xslt:template name="m:merge">
   <xslt:param name="nodes1" />
   <xslt:param name="nodes2" />
 
   <xslt:choose>
      <!-- Is $nodes1 resp. $nodes2 empty? -->
      <xslt:when test="count($nodes1)=0">
         <xslt:copy-of select="$nodes2" />
      </xslt:when>
      <xslt:when test="count($nodes2)=0">
         <xslt:copy-of select="$nodes1" />
      </xslt:when>
 
      <xslt:otherwise>
         <!-- Split $nodes1 and $nodes2 -->
         <xslt:variable name="first1" select="$nodes1[1]" />
         <xslt:variable name="rest1" select="$nodes1[position()!=1]" />
         <xslt:variable name="first2" select="$nodes2[1]" />
         <xslt:variable name="rest2" select="$nodes2[position()!=1]" />
         <!-- Determine type of node $first1 -->
         <xslt:variable name="type1">
            <xslt:apply-templates mode="m:detect-type" select="$first1" />
         </xslt:variable>
 
         <!-- Compare $first1 and $first2 -->
         <xslt:variable name="diff-first">
            <xslt:call-template name="m:compare-nodes">
               <xslt:with-param name="node1" select="$first1" />
               <xslt:with-param name="node2" select="$first2" />
            </xslt:call-template>
         </xslt:variable>
 
         <xslt:choose>
            <!-- $first1 != $first2 -->
            <xslt:when test="$diff-first='!'">
               <!-- Compare $first1 and $rest2 -->
               <xslt:variable name="diff-rest">
                  <xslt:for-each select="$rest2">
                     <xslt:call-template name="m:compare-nodes">
                        <xslt:with-param name="node1" select="$first1" />
                        <xslt:with-param name="node2" select="." />
                     </xslt:call-template>
                  </xslt:for-each>
               </xslt:variable>
 
               <xslt:choose>
                  <!-- $first1 is in $rest2 and 
                       $first1 is *not* an empty text node  -->
                  <xslt:when test="contains($diff-rest,'=') and
                                      not($type1='text' and
                                          normalize-space($first1)='')">
                     <!-- determine position of $first1 in $nodes2
                          and copy all preceding nodes of $nodes2 -->
                     <xslt:variable name="pos" 
                           select="string-length(substring-before(
                                                $diff-rest,'=')) + 2" />
                     <xslt:copy-of 
                           select="$nodes2[position() < $pos]" />
                     <!-- merge $first1 with its equivalent node -->
                     <xslt:choose>
                        <!-- Elements: merge -->
                        <xslt:when test="$type1='element'">
                           <xslt:element name="{name($first1)}" 
                                         namespace="{namespace-uri($first1)}">
                              <xslt:copy-of select="$first1/namespace::*" />
                              <xslt:copy-of select="$first2/namespace::*" />
                              <xslt:copy-of select="$first1/@*" />
                              <xslt:call-template name="m:merge">
                                 <xslt:with-param name="nodes1" 
                                       select="$first1/node()" />
                                 <xslt:with-param name="nodes2" 
                                       select="$nodes2[position()=$pos]/node()" />
                              </xslt:call-template>
                           </xslt:element>
                        </xslt:when>
                        <!-- Other: copy -->
                        <xslt:otherwise>
                           <xslt:copy-of select="$first1" />
                        </xslt:otherwise>
                     </xslt:choose>
 
                     <!-- Merge $rest1 and rest of $nodes2 -->
                     <xslt:call-template name="m:merge">
                        <xslt:with-param name="nodes1" select="$rest1" />
                        <xslt:with-param name="nodes2" 
                              select="$nodes2[position() > $pos]" />
                     </xslt:call-template>
                  </xslt:when>
 
                  <!-- $first1 is a text node and replace mode was
                       activated -->
                  <xslt:when test="$type1='text' and $replace">
                     <xslt:call-template name="m:merge">
                        <xslt:with-param name="nodes1" select="$rest1" />
                        <xslt:with-param name="nodes2" select="$nodes2" />
                     </xslt:call-template>
                  </xslt:when>
 
                  <!-- else: $first1 is not in $rest2 or
                       $first1 is an empty text node -->
                  <xslt:otherwise>
                     <xslt:copy-of select="$first1" />
                     <xslt:call-template name="m:merge">
                        <xslt:with-param name="nodes1" select="$rest1" />
                        <xslt:with-param name="nodes2" select="$nodes2" />
                     </xslt:call-template>
                  </xslt:otherwise>
               </xslt:choose>
            </xslt:when>
 
            <!-- else: $first1 = $first2 -->
            <xslt:otherwise>
               <xslt:choose>
                  <!-- Elements: merge -->
                  <xslt:when test="$type1='element'">
                     <xslt:element name="{name($first1)}" 
                                   namespace="{namespace-uri($first1)}">
                        <xslt:copy-of select="$first1/namespace::*" />
                        <xslt:copy-of select="$first2/namespace::*" />
                        <xslt:copy-of select="$first1/@*" />
                        <xslt:call-template name="m:merge">
                           <xslt:with-param name="nodes1" 
                                            select="$first1/node()" />
                           <xslt:with-param name="nodes2" 
                                            select="$first2/node()" />
                        </xslt:call-template>
                     </xslt:element>
                  </xslt:when>
                  <!-- Other: copy -->
                  <xslt:otherwise>
                     <xslt:copy-of select="$first1" />
                  </xslt:otherwise>
               </xslt:choose>
 
               <!-- Merge $rest1 and $rest2 -->
               <xslt:call-template name="m:merge">
                  <xslt:with-param name="nodes1" select="$rest1" />
                  <xslt:with-param name="nodes2" select="$rest2" />
               </xslt:call-template>
            </xslt:otherwise>
         </xslt:choose>
      </xslt:otherwise>
   </xslt:choose>
</xslt:template>
 
 
<!-- Comparing single nodes: 
     if $node1 and $node2 are equivalent then the template creates a 
     text node "=" otherwise a text node "!" -->
<xslt:template name="m:compare-nodes">
   <xslt:param name="node1" />
   <xslt:param name="node2" />
   <xslt:variable name="type1">
      <xslt:apply-templates mode="m:detect-type" select="$node1" />
   </xslt:variable>
   <xslt:variable name="type2">
      <xslt:apply-templates mode="m:detect-type" select="$node2" />
   </xslt:variable>
 
   <xslt:choose>
      <!-- Are $node1 and $node2 element nodes with the same name? -->
      <xslt:when test="$type1='element' and $type2='element' and
                       local-name($node1)=local-name($node2) and
                       namespace-uri($node1)=namespace-uri($node2) and
                       name($node1)!=$dontmerge and name($node2)!=$dontmerge">
         <!-- Comparing the attributes -->
         <xslt:variable name="diff-att">
            <!-- same number ... -->
            <xslt:if test="count($node1/@*)!=count($node2/@*)">.</xslt:if>
            <!-- ... and same name/content -->
            <xslt:for-each select="$node1/@*">
               <xslt:if test="not($node2/@*
                        [local-name()=local-name(current()) and 
                         namespace-uri()=namespace-uri(current()) and 
                         .=current()])">.</xslt:if>
            </xslt:for-each>
         </xslt:variable>
         <xslt:choose>
            <xslt:when test="string-length($diff-att)!=0">!</xslt:when>
            <xslt:otherwise>=</xslt:otherwise>
         </xslt:choose>
      </xslt:when>
 
      <!-- Other nodes: test for the same type and content -->
      <xslt:when test="$type1!='element' and $type1=$type2 and
                       name($node1)=name($node2) and 
                       ($node1=$node2 or 
                          ($normalize='yes' and
                           normalize-space($node1)=
                           normalize-space($node2)))">=</xslt:when>
 
      <!-- Otherwise: different node types or different name/content -->
      <xslt:otherwise>!</xslt:otherwise>
   </xslt:choose>
</xslt:template>
 
 
<!-- Type detection, thanks to M. H. Kay -->
<xslt:template match="*" mode="m:detect-type">element</xslt:template>
<xslt:template match="text()" mode="m:detect-type">text</xslt:template>
<xslt:template match="comment()" mode="m:detect-type">comment</xslt:template>
<xslt:template match="processing-instruction()" mode="m:detect-type">pi</xslt:template>
 
</xslt:transform> | 
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