/[cvs]/joko/Scripts/xupdate/xupdate.pl
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Annotation of /joko/Scripts/xupdate/xupdate.pl

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Revision 1.4 - (hide annotations)
Thu May 1 19:47:09 2003 UTC (21 years, 2 months ago) by joko
Branch: MAIN
CVS Tags: HEAD
Changes since 1.3: +156 -39 lines
File MIME type: text/plain
attempts to get things going

1 joko 1.1 #!/usr/bin/perl
2    
3     ## -------------------------------------------------------------------------
4 joko 1.4 ## $Id: xupdate.pl,v 1.3 2003/04/26 01:42:39 joko Exp $
5 joko 1.1 ## -------------------------------------------------------------------------
6 joko 1.2 ## $Log: xupdate.pl,v $
7 joko 1.4 ## Revision 1.3 2003/04/26 01:42:39 joko
8     ## first attempt to make up a crud template
9     ##
10 joko 1.3 ## Revision 1.2 2003/04/25 12:35:23 joko
11     ## added some pod
12     ## revamped xsl
13     ##
14 joko 1.2 ## Revision 1.1 2003/04/24 21:07:36 joko
15     ## initial commit
16     ##
17 joko 1.1 ## -------------------------------------------------------------------------
18    
19    
20     =pod
21    
22    
23     =head3 Overview
24    
25     This is not the same xupdate currently available from CPAN at
26     http://search.cpan.org/author/PAJAS/XML-XUpdate-LibXML-0.4.0/xupdate .
27    
28     Its intention - however - is identical:
29     xupdate - Process XUpdate commands over an XML document
30    
31     =head3 Their implementations differ:
32     xupdate (by Petr Pajas) uses ...
33     XML::XUpdate::LibXML - Simple implementation of XUpdate format
34    
35     ... which is based on XML::LibXML which in turn is:
36     This module is an interface to the gnome libxml2 DOM parser (no SAX parser support yet),
37     and the DOM tree. It also provides an XML::XPath-like findnodes() interface, providing
38     access to the XPath API in libxml2.
39    
40    
41 joko 1.2 =head3 Yet another xupdate - facts in short:
42 joko 1.1
43 joko 1.2 S: It would be nice to have a pure perl thingy which does (almost) the same stuff....
44 joko 1.1
45 joko 1.2 Q: Can we achieve compliance with its (XML::XUpdate::LibXML) API? (just a subset ....)
46 joko 1.1
47     Q: Can we achieve the processing declared as a XSL document processed using CPAN's XML::XSLT?
48    
49     Q: Proposal: XML::XUpdate::XSLT!?
50    
51     Q: Can we mimic/use the interface of the - already established - 'xupdate' program???
52    
53 joko 1.2 Q: Should we follow the CRUD path first?
54    
55 joko 1.1
56     =cut
57    
58    
59     package main;
60    
61     use strict;
62     use warnings;
63    
64     BEGIN {
65     use lib '../../../nfo/perl/libs';
66     }
67    
68     use Data::Dumper;
69     use XML::XSLT;
70     #use XML::DOM;
71     #use XML::DOM::Document;
72     use shortcuts::files qw( f2s );
73    
74     my $file = 'c:/home/amo/develop/top-scores.net/ts/backend/var/resources/control/import_select.xml';
75    
76 joko 1.4
77     #my $stylesheet_xupdate = '
78    
79     my $stylesheet_xupdate = '<?xml version="1.0" encoding="ISO-8859-1"?>
80 joko 1.1
81     <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
82    
83     <!--
84    
85     Purpose of this XML Stylesheet is to implement a set of templates
86     to do simple xml node manipulation. (kinda XML API)
87     Main target is "flexible insertion of new xml child nodes".
88    
89     If this attempt works out well, it will be continued by a follow-up
90     trying to implement XUpdate in XSLT.
91    
92    
93     References:
94     - XUpdate:
95     Requirements: http://www.xmldb.org/xupdate/xupdate-req.html
96     Working Draft: http://www.xmldb.org/xupdate/xupdate-wd.html
97     - XML API:
98     - XML::XUpdate::LibXML: http://search.cpan.org/author/PAJAS/XML-XUpdate-LibXML-0.4.0/lib/XML/XUpdate/LibXML.pm
99     - XSL / XSLT:
100     http://www.w3.org/TR/xslt
101     http://www.xsl-rp.de/
102     http://xml.klute-thiemann.de/w3c-de/REC-xslt-20020318/
103     http://xmlxslt.sourceforge.net/
104     - misc pointers:
105     "Re: Modify XML documents": http://aspn.activestate.com/ASPN/Mail/Message/perl-xml/1265431
106     XSL Extensions: http://xmlsoft.org/XSLT/extensions.html
107     EXSLT: http://www.exslt.org/set/functions/difference/index.html
108     "how to insert element at required position in document tree?": http://p2p.wrox.com/archive/xslt/2001-06/98.asp
109     XML APIs for Databases: http://www.javaworld.com/javaworld/jw-01-2000/jw-01-dbxml.html
110    
111     -->
112    
113     <xsl:output method="raw"/>
114    
115 joko 1.3 <!-- 1. This is the passthru logic (copy all untouched nodes). -->
116     <xsl:template name="passthru"><xsl:copy><xsl:apply-templates /></xsl:copy></xsl:template>
117     <!-- activate this -->
118 joko 1.2 <xsl:template match="*"><xsl:call-template name="passthru" /></xsl:template>
119 joko 1.3 <!-- override some builtin rules: see http://www.w3.org/TR/xslt#built-in-rule -->
120 joko 1.4 <xsl:template match="comment()"><xsl:call-template name="passthru" /></xsl:template>
121 joko 1.1
122 joko 1.2 <!-- 2. This is the crud API. -->
123    
124     <!-- 2.a. The context finder. -->
125 joko 1.1
126 joko 1.3 <!-- query part one: the node name -->
127     <xsl:template match="source">
128 joko 1.2 <xsl:choose>
129 joko 1.3 <!-- query part two: the attrib key and value -->
130 joko 1.2 <xsl:when test="@key=expekt">
131 joko 1.3 <xsl:call-template name="crud" >
132 joko 1.4 <xsl:with-param name="action">CREATE</xsl:with-param>
133     <xsl:with-param name="mode">callback</xsl:with-param>
134     <xsl:with-param name="cbname">abc</xsl:with-param>
135 joko 1.3 </xsl:call-template>
136 joko 1.2 </xsl:when>
137     <xsl:otherwise>
138     <xsl:call-template name="passthru_kay" />
139     </xsl:otherwise>
140     </xsl:choose>
141     </xsl:template>
142    
143    
144     <!-- 2.b. The node manipulators: They translate the current context. -->
145    
146     <!-- by Mike Kay, Software AG [http://p2p.wrox.com/archive/xslt/2001-06/98.asp] -->
147     <!-- enhancements & comments: Andreas Motl, rotamente.de -->
148     <!-- <xsl:template match="source"> -->
149     <xsl:template name="passthru_kay">
150     <xsl:copy>
151     <xsl:copy-of select="@*" />
152     <xsl:apply-templates />
153     </xsl:copy>
154     </xsl:template>
155    
156     <xsl:template name="inject_kay_motl">
157 joko 1.3 <xsl:param name="payload" />
158     <xsl:value-of select="$payload" />
159 joko 1.2 <xsl:copy>
160     <xsl:copy-of select="@*" />
161     <xsl:apply-templates />
162     <!-- <xsl:apply-templates select="*[3]" /> -->
163     <!-- <xsl:value-of select="text()" /> -->
164     <!-- Multiple handlers here now: a) create fressshhhh element, b) clone s.th. -->
165     <!-- TODO: Do switch/case or couple of if/then statements here to be able to handle that "at runtime". -->
166     <xsl:call-template name="create_fresh_element" />
167     <xsl:call-template name="clone_last_element" />
168     <xsl:call-template name="clone_element_nr" />
169     </xsl:copy>
170 joko 1.1 </xsl:template>
171    
172 joko 1.3 <xsl:template name="crud">
173    
174 joko 1.4 <xsl:param name="action" />
175     <xsl:param name="payload" />
176     <xsl:param name="mode" />
177     <xsl:param name="cbname" />
178    
179     <!--
180     action: <xsl:value-of select="$action" />
181     payload: <xsl:value-of select="$payload" />
182     -->
183    
184     <!--
185     <xsl:if test="$action=5">
186     CRUD: CREATE - if
187     </xsl:if>
188     -->
189 joko 1.3
190 joko 1.4 <xsl:copy>
191 joko 1.3
192 joko 1.4 <xsl:copy-of select="@*" />
193     <xsl:apply-templates />
194    
195     <!-- crud action dispatcher -->
196     <xsl:choose>
197    
198     <!-- CREATE -->
199     <xsl:when test="{$action}=CREATE">
200    
201     <!-- thats a (compact) switch case in xsl lingo! -->
202     <xsl:choose>
203    
204     <xsl:when test="$payload!=">
205     <xsl:comment> Payload injected on {timestamp} </xsl:comment>
206     <xsl:value-of select="$payload" />
207     </xsl:when>
208    
209     <xsl:when test="$mode=callback">
210     <xsl:comment> Payload injected via callback <xsl:value-of select="{$cbname}" /> on {$timestamp} </xsl:comment>
211     <xsl:call-template name="xupdate_element_create_embedded" />
212     </xsl:when>
213    
214     <xsl:otherwise>
215     <xsl:comment> Cloned last element as template on {timestamp} </xsl:comment>
216     <xsl:call-template name="clone_last_element" />
217     </xsl:otherwise>
218    
219     </xsl:choose>
220    
221     </xsl:when>
222    
223     <xsl:otherwise>
224     <xsl:comment>
225     UNKOWN CRUD ACTION: "<xsl:value-of select="$action" />" on <xsl:value-of select="$now" />.
226     </xsl:comment>
227     </xsl:otherwise>
228    
229     </xsl:choose>
230    
231     </xsl:copy>
232 joko 1.3
233     </xsl:template>
234    
235 joko 1.1
236    
237 joko 1.2 <!-- 2.c. The element manipulators: They mungle a specific element inside the current context. -->
238 joko 1.1
239     <!-- copy over node 1:1 (use last element as a template) -->
240     <xsl:template name="clone_last_element">
241 joko 1.3 <xsl:copy-of select="*[last()]" />
242 joko 1.1 </xsl:template>
243    
244     <xsl:template name="clone_element_nr">
245 joko 1.3 <!-- TODO: let idx be passed in via "with-param" or s.th.l.th. -->
246     <xsl:copy-of select="*[2]" />
247 joko 1.1 </xsl:template>
248    
249     <!-- creates instance of new element -->
250     <xsl:template name="create_fresh_element">
251 joko 1.3 <xsl:element name="new">content</xsl:element>
252 joko 1.1 </xsl:template>
253    
254 joko 1.4 <xsl:template name="xupdate_element_create_embedded">
255     <xsl:variable name="huhu" select="*[0]/@key">haha</xsl:variable>
256     <!-- <xsl:transform version="1.1" xmlns:xupdate="http://www.xmldb.org/xupdate"> -->
257     <!-- <xupdate:modifications version="1.0" xmlns:xupdate="http://www.xmldb.org/xupdate"> -->
258     <!-- <xsl:append select="/addresses" child="last()"> -->
259     <xsl:element name="address">
260     <town>San Francisco</town>
261     </xsl:element>
262     <xsl:value-of select="*[0]/@key" />
263     <xsl:value-of select="$huhu" />
264     <!-- </xupdate:modifications> -->
265     <!-- </xsl:append> -->
266     <!-- </xsl:transform> -->
267     </xsl:template>
268    
269 joko 1.1
270     <!-- inject other stuff -->
271     <xsl:template name="inject_template">
272     <xsl:comment> Hello World! </xsl:comment>
273    
274     </xsl:template>
275    
276    
277    
278 joko 1.2
279     <!-- 0. The root node dispatcher. -->
280     <!-- <xsl:template match="source"><xsl:call-template name="insertChildNode"/></xsl:template> -->
281    
282     <!-- 2. This is the manipulation logic: insertChildNode -->
283    
284     <!-- 2.a. The "API" method. - now deprecated -->
285     <xsl:template name="insertChildNode">
286    
287     <!-- manipulate node -->
288     <xsl:comment> node - begin </xsl:comment>
289    
290     <!-- <xsl:copy-of select="source" /> -->
291 joko 1.1 <xsl:copy>
292 joko 1.2
293     <!-- Pass through children 1:1. -->
294 joko 1.1 <xsl:apply-templates />
295 joko 1.2
296     <!-- Call one of the manipulators - this implements injection behavior. -->
297 joko 1.1 <xsl:call-template name="clone_last_element" />
298 joko 1.2 <xsl:call-template name="inject_template" />
299    
300     </xsl:copy>
301     <xsl:comment> node - end </xsl:comment>
302    
303 joko 1.1 </xsl:template>
304    
305    
306     </xsl:stylesheet>
307    
308     ';
309    
310 joko 1.4
311    
312    
313     # examples from http://www.xmldb.org/xupdate/xupdate-wd.html#N238f4
314    
315     my $xml_document = qq(<?xml version="1.0"?>
316     <addresses version="1.0">
317     <address id="1">
318     <fullname>Andreas Laux</fullname>
319     <born day='1' month='12' year='1978'/>
320     <town>Leipzig</town>
321     <country>Germany</country>
322     </address>
323     </addresses>
324     );
325    
326     # a stripped example (the "xupdate payload")
327     my $xml_xupdate_stripped = qq(
328     <xupdate:element name="address">
329     <xupdate:attribute name="id">2</xupdate:attribute>
330     <fullname>Lars Martin</fullname>
331     <born day='2' month='12' year='1974'/>
332     <town>Leizig</town>
333     <country>Germany</country>
334     </xupdate:element>
335     );
336    
337     # a full xupdate example (including the directive)
338     my $xml_xupdate_full = qq(<?xml version="1.0"?>
339     <xupdate:modifications version="1.0" xmlns:xupdate="http://www.xmldb.org/xupdate">
340    
341     <xupdate:insert-after select="/addresses/address[1]" >
342    
343     <xupdate:element name="address">
344     <xupdate:attribute name="id">2</xupdate:attribute>
345     <fullname>Lars Martin</fullname>
346     <born day='2' month='12' year='1974'/>
347     <town>Leizig</town>
348     <country>Germany</country>
349     </xupdate:element>
350    
351     </xupdate:insert-after>
352    
353     </xupdate:modifications>
354     );
355    
356     sub main_old {
357     #$xslt->open_xml( Source => f2s($file) );
358     #$xslt->open_xml( Source => $xml_xupdate_full );
359     #$xslt->xsl_ns('xupdate', 'xsl');
360    
361     #$xslt->process();
362     #print $xslt->toString(), "\n";
363     }
364    
365    
366 joko 1.1 sub main {
367    
368 joko 1.4 use XML::XUpdate::XSLT;
369     my $xupdate = XML::XUpdate::XSLT->new(
370 joko 1.1 warnings => 1
371     );
372 joko 1.4
373     #print Dumper($xupdate);
374    
375     $xupdate->open_document( $xml_document );
376     #exit;
377 joko 1.1
378 joko 1.4 $xupdate->open_xupdate( $xml_xupdate_full );
379    
380     $xupdate->process();
381     my $result = $xupdate->toString();
382     if ($result) {
383     print $result, "\n";
384     } else {
385     print "No result.", "\n";
386     }
387    
388 joko 1.1 }
389    
390     main();
391     print "ready.", "\n";
392    
393     1;
394     __END__

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