--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/software/eXist/webapp/mpdl/interface/xpath.xql	Tue Feb 08 15:16:46 2011 +0100
@@ -0,0 +1,70 @@
+xquery version "1.0";
+
+declare namespace request = "http://exist-db.org/xquery/request";
+declare namespace util = "http://exist-db.org/xquery/util";
+declare namespace echo="http://www.mpiwg-berlin.mpg.de/ns/echo/1.0/";
+
+(: ToDo wenn eine pn gegeben ist, wird momentan der namespace ignoriert  :)
+let $mpdlDocUri := request:get-parameter("document", "")
+let $pn := number(request:get-parameter("pn", "-1"))
+let $xpath := request:get-parameter("xpath", "")
+let $output := request:get-parameter("output", "")
+let $resultPageNumber := number(request:get-parameter("resultPN", "1"))
+let $resultPageSize := number(request:get-parameter("resultPageSize", "50"))
+
+let $documentName := substring-before(substring-after(substring-after(substring-after($mpdlDocUri, "/"), "/"), "/"), ".")
+let $docbase := substring-before(substring-after($mpdlDocUri, "/"), "/")
+let $fullDocumentUri := concat('/db/mpdl/documents/morph', $mpdlDocUri)
+let $document := doc($fullDocumentUri)
+let $pageBreaks := 
+  if ($docbase = 'archimedes' and $pn != -1)
+  then $document//pb
+  else if ($docbase = 'echo' and $pn != -1)
+  then $document//echo:pb
+  else $document//pb
+let $countPBs := count($pageBreaks)
+let $pb1 := subsequence($pageBreaks, $pn, 1)
+let $pb2 := subsequence($pageBreaks, $pn + 1, 1)
+let $pageFragmentStr := 
+  if ($pn != -1 and $countPBs > 0)
+  then util:get-fragment-between($pb1, $pb2, true())
+  else if ($pn != -1 and $countPBs = 0)
+  then ""
+  else ()
+let $pageFragment := 
+  if ($countPBs > 0)
+  then util:parse($pageFragmentStr)
+  else $document
+let $xPathFragment := concat(".", $xpath)
+let $resultEval :=
+  if ($pn > 0)
+  then util:eval-inline($pageFragment, $xPathFragment)
+  else util:eval-inline($document, $xPathFragment)
+let $from := ($resultPageNumber * $resultPageSize) - $resultPageSize + 1
+let $to := $resultPageNumber * $resultPageSize
+let $resultEvalPage := 
+  for $entry at $pos in $resultEval
+  where $pos >= $from and $pos <= $to
+  return $entry
+let $size := count($resultEval)
+let $pages := 
+  if ($size = 0)
+  then 0
+  else $size idiv $resultPageSize + 1
+let $result := 
+      <result>
+        <document>{$mpdlDocUri}</document>
+        <documentPageNumber>{$pn}</documentPageNumber>
+        <resultSize>{$size}</resultSize>
+        <resultPageSize>{$resultPageSize}</resultPageSize>
+        <countResultPages>{$pages}</countResultPages>
+        <resultPageNumber>{$resultPageNumber}</resultPageNumber>
+        <resultPage>{$resultEvalPage}</resultPage>
+      </result>  
+
+let $declare := 
+  if ($output != "html")
+  then util:declare-option("exist:serialize", "method=xml media-type=text/xml omit-xml-declaration=no indent=yes encoding=utf-8")
+  else util:declare-option("exist:serialize", "method=html media-type=text/html omit-xml-declaration=no indent=yes encoding=utf-8")
+
+return $result
\ No newline at end of file