/[cvs]/nfo/perl/libs/XML/XUpdate/xupdate2xsl.xml
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Contents of /nfo/perl/libs/XML/XUpdate/xupdate2xsl.xml

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Revision 1.7 - (show annotations)
Fri Jun 6 04:02:34 2003 UTC (21 years, 5 months ago) by joko
Branch: MAIN
CVS Tags: HEAD
Changes since 1.6: +2 -1 lines
File MIME type: text/xml
modified remove action

1 <?xml version="1.0" encoding="ISO-8859-1"?>
2
3 <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
4
5 <!--
6
7 xupdate2xsl: Translate XML document from namespace 'xupdate' to 'xsl'.
8
9 Purpose of this XML Stylesheet is to implement a set of templates
10 to translate XUpdate lingo into an intermediate xslt stylesheet
11 which actually performs the update to the original xml document
12 in a second step.
13
14 The required glue code - written in Perl - is available in module
15 XML::XUpdate::XSLT. Please have a look at this in order to write
16 code to use this stylesheet from other language bindings.
17
18 Please have a look at the XUpdate specs and associated resources:
19 Requirements: http://www.xmldb.org/xupdate/xupdate-req.html
20 Working Draft: http://www.xmldb.org/xupdate/xupdate-wd.html
21
22 ChangeLog:
23 2003-04-30: first alpha
24 2003-05-01: works: xupdate:insert-after (elements/attributes)
25 2003-05-06: works: xupdate:insert-before (elements/attributes)
26
27 -->
28
29 <xsl:output method="xml" />
30
31 <!-- 1. This is the passthru logic (copy all untouched nodes). -->
32 <xsl:template name="passthru"><xsl:copy><xsl:apply-templates /></xsl:copy></xsl:template>
33 <!-- activate this -->
34 <xsl:template match="*"><xsl:call-template name="passthru" /></xsl:template>
35 <!-- override some builtin rules: see http://www.w3.org/TR/xslt#built-in-rule -->
36 <xsl:template match="comment()"><xsl:call-template name="passthru" /></xsl:template>
37
38
39 <!-- 2. This is the translation part: XUpdate becomes XSLT -->
40
41 <!-- lib -->
42 <!-- This node "encapsulates" common core infrastructure. -->
43 <xsl:template match="xupdate:modifications">
44
45 <!-- <xsl:template name="identity_template_rule"> -->
46 <xsl:element name="xsl:template">
47 <xsl:attribute name="name">identity_template_rule</xsl:attribute>
48
49 <!-- An "identity template rule" - original version by Mike Kay, Software AG -->
50 <!-- Please visit [http://p2p.wrox.com/archive/xslt/2001-06/98.asp] -->
51 <!-- Translated to "self hosting xsl": Andreas Motl, andreas.motl@ilo.de -->
52 <!-- FIXME: Could this be used to replace passthru-logic at 1. ? -->
53 <xsl:element name="xsl:copy">
54 <xsl:element name="xsl:copy-of">
55 <xsl:attribute name="select">@*</xsl:attribute>
56 </xsl:element>
57 <xsl:element name="xsl:apply-templates" />
58 </xsl:element>
59
60 </xsl:element>
61 <!-- </xsl:template> -->
62
63 <!--
64 1. Note: Former custom passthru logic (copy all untouched nodes)
65 now completely replaced by Mike Kay's "identity template rule".
66 What is left here is just the required overriding of some builtin rules
67 to (e.g.) not to loose comments.
68 -->
69 <xsl:comment> 1. override built-in rules </xsl:comment>
70 <!-- override some builtin rules: see http://www.w3.org/TR/xslt#built-in-rule -->
71 <xsl:element name="xsl:template"><xsl:attribute name="match">comment()</xsl:attribute>
72 <xsl:element name="xsl:call-template">
73 <xsl:attribute name="name">identity_template_rule</xsl:attribute>
74 </xsl:element>
75 </xsl:element>
76
77 <!-- continue with all inline nodes -->
78 <xsl:apply-templates />
79
80 </xsl:template>
81
82
83
84
85
86 <!-- code -->
87 <!-- This node "encapsulates" infrastructure for handling the directives. -->
88
89 <!-- Dispatch all "XUpdate Services" here. -->
90 <!-- FIXME: Actually implement action = "CREATE|RETRIEVE|UPDATE|DELETE"!!! -->
91
92 <!--
93 xsl for XUpdate Services [2 XUpdate Syntax] [2.3 Modifications]
94 -->
95
96 <!-- xsl for [2.4 Inserts] -->
97 <xsl:template match="xupdate:insert-after">
98 <!-- <xsl:variable name="select" select="@select">Hello World!</xsl:variable> -->
99 <xsl:call-template name="findcontext">
100 <xsl:with-param name="service">Insert</xsl:with-param>
101 <xsl:with-param name="position">after</xsl:with-param>
102 </xsl:call-template>
103 </xsl:template>
104
105 <!-- xsl for [2.4 Inserts] -->
106 <xsl:template match="xupdate:insert-before">
107 <xsl:call-template name="findcontext">
108 <xsl:with-param name="service">Insert</xsl:with-param>
109 <xsl:with-param name="position">before</xsl:with-param>
110 </xsl:call-template>
111 </xsl:template>
112
113 <!-- xsl for [2.5 Append] -->
114 <xsl:template match="xupdate:append">
115 <xsl:call-template name="findcontext">
116 <xsl:with-param name="service">Append</xsl:with-param>
117 <!-- <xsl:with-param name="position">inline</xsl:with-param> -->
118 <xsl:with-param name="test">.</xsl:with-param>
119 </xsl:call-template>
120 </xsl:template>
121
122 <!-- xsl for [2.6 Update] -->
123 <xsl:template match="xupdate:update">
124 <xsl:call-template name="findcontext">
125 <xsl:with-param name="service">Update</xsl:with-param>
126 <!-- <xsl:with-param name="position">after</xsl:with-param> -->
127 <xsl:with-param name="test">.</xsl:with-param>
128 </xsl:call-template>
129 </xsl:template>
130
131 <!-- xsl for [2.7 Remove] -->
132 <xsl:template match="xupdate:remove">
133 <xsl:call-template name="findcontext">
134 <xsl:with-param name="service">Remove</xsl:with-param>
135 <!-- <xsl:with-param name="position">after</xsl:with-param> -->
136 <!-- 2003-06-04: removed -->
137 <!-- <xsl:with-param name="test">.</xsl:with-param> -->
138 </xsl:call-template>
139 </xsl:template>
140
141 <!-- xsl for [2.8 Rename] -->
142 <xsl:template match="xupdate:rename">
143 <xsl:call-template name="findcontext">
144 <xsl:with-param name="service">Rename</xsl:with-param>
145 <!-- <xsl:with-param name="position">after</xsl:with-param> -->
146 <xsl:with-param name="test">.</xsl:with-param>
147 </xsl:call-template>
148 </xsl:template>
149
150
151
152 <xsl:template name="findcontext">
153
154 <xsl:comment> 2. context finder </xsl:comment>
155
156 <!-- new of 2003-05-06: introducing parameters here to handle all cases -->
157 <xsl:param name="service" />
158 <xsl:param name="position" />
159 <!-- new of 2003-05-07: replacement for test if undef -->
160 <xsl:param name="test" />
161
162 <!--
163 <xsl:comment>
164 service: <xsl:value-of select="$service" />
165 position: <xsl:value-of select="$position" />
166 test: <xsl:value-of select="$test" />
167 </xsl:comment>
168 -->
169
170 <!-- this resembles some parts of the CRUD API - retranslated to self-hosting xsl -->
171
172 <!-- V1 -->
173 <!-- <xsl:element name="xsl:template"> -->
174 <!-- <xsl:attribute name="match"><xsl:value-of select="@select" /></xsl:attribute> -->
175
176 <!-- fallback -->
177 <xsl:element name="xsl:template">
178 <xsl:attribute name="match">*</xsl:attribute>
179 <xsl:element name="xsl:call-template">
180 <xsl:attribute name="name">identity_template_rule</xsl:attribute>
181 <!-- <xsl:attribute name="name">passthru</xsl:attribute> -->
182 </xsl:element>
183 </xsl:element>
184
185 <!-- V2 -->
186 <xsl:element name="xsl:template">
187 <!-- <xsl:attribute name="match">/addresses/address</xsl:attribute> -->
188 <!-- <xsl:attribute name="match">*</xsl:attribute> -->
189 <xsl:attribute name="match"><xsl:value-of select="@select" /></xsl:attribute>
190
191 <xsl:element name="xsl:choose">
192 <!-- <xsl:attribute name="match"><xsl:value-of select="@select" /></xsl:attribute> -->
193 <xsl:element name="xsl:when">
194 <!-- <xsl:attribute name="test"><xsl:value-of select="@select" /></xsl:attribute> -->
195 <xsl:attribute name="test"><xsl:value-of select="@test" /><xsl:value-of select="$test" /></xsl:attribute>
196
197 <xsl:choose>
198 <xsl:when test="{$service}=Insert">
199
200 <xsl:comment> 2.a. Insert </xsl:comment>
201
202 <!-- Implementation of "xupdate:insert-before" -->
203 <xsl:choose>
204 <xsl:when test="{$position}=before">
205 <xsl:apply-templates />
206 </xsl:when>
207 </xsl:choose>
208
209 <!-- call the "identity template rule" to passthru all childnodes -->
210 <xsl:element name="xsl:call-template">
211 <xsl:attribute name="name">identity_template_rule</xsl:attribute>
212 <!-- <xsl:attribute name="name">passthru</xsl:attribute> -->
213 </xsl:element>
214
215 <!-- Implementation of "xupdate:insert-after" -->
216 <xsl:choose>
217 <xsl:when test="{$position}=after">
218 <xsl:apply-templates />
219 </xsl:when>
220 </xsl:choose>
221
222 </xsl:when>
223
224 <!-- Implementation of "xupdate:append" -->
225 <xsl:when test="{$service}=Append">
226 <xsl:comment> 2.b. Append </xsl:comment>
227 <!-- V1 -->
228 <!-- <xsl:apply-templates /> -->
229 <!-- V2 -->
230 <xsl:element name="xsl:copy">
231 <!--
232 <xsl:element name="xsl:copy-of">
233 <xsl:attribute name="select">@*</xsl:attribute>
234 </xsl:element>
235 -->
236 <!-- Keep content ... -->
237 <xsl:element name="xsl:apply-templates" />
238 <!-- Append this: -->
239 <xsl:apply-templates />
240 </xsl:element>
241 </xsl:when>
242
243 <!-- Implementation of "xupdate:update" -->
244 <xsl:when test="{$service}=Update">
245 <xsl:comment> 2.c. Update </xsl:comment>
246 <!-- V1 -->
247 <!-- <xsl:apply-templates /> -->
248 <!-- V2 -->
249 <xsl:element name="xsl:copy">
250 <!--
251 <xsl:element name="xsl:copy-of">
252 <xsl:attribute name="select">@*</xsl:attribute>
253 </xsl:element>
254 -->
255 <!-- Keep content ... -->
256 <!-- <xsl:element name="xsl:apply-templates" /> -->
257 <!-- Add (replace through) this: -->
258 <xsl:apply-templates />
259 </xsl:element>
260 </xsl:when>
261
262 <!-- Implementation of "xupdate:remove" -->
263 <xsl:when test="{$service}=Remove">
264 <xsl:comment> 2.d. Remove </xsl:comment>
265 </xsl:when>
266
267 <!-- Implementation of "xupdate:rename" -->
268 <xsl:when test="{$service}=Rename">
269 <xsl:comment> 2.e. Rename (Remove context and Append modified identity template) </xsl:comment>
270
271 <xsl:comment> [5.a.] modify node name </xsl:comment>
272 <xsl:element name="xsl:element">
273 <!-- this renames the node (change the "name"-attribute) -->
274 <xsl:attribute name="name">
275 <xsl:apply-templates />
276 </xsl:attribute>
277 <!-- this propagates the original content -->
278 <xsl:element name="xsl:apply-templates" />
279 </xsl:element>
280
281 </xsl:when>
282
283 </xsl:choose>
284
285 </xsl:element>
286 <xsl:element name="xsl:otherwise">
287
288 <!-- call the "identity template rule" to passthru all childnodes -->
289 <xsl:element name="xsl:call-template">
290 <xsl:attribute name="name">identity_template_rule</xsl:attribute>
291 <!-- <xsl:attribute name="name">passthru</xsl:attribute> -->
292 </xsl:element>
293
294 <!-- <xsl:apply-templates /> -->
295 </xsl:element>
296
297 </xsl:element>
298 </xsl:element>
299
300 <!-- <xsl:apply-templates /> -->
301
302 </xsl:template>
303
304
305 <!--
306 Rewrite XUpdate elements to XSLT elements.
307 These templates pass through all attributes
308 and childnodes rewriting the tagname only.
309 FIXME: The redundant encoding for each XUpdate
310 element type seems dummy. Could this be stripped
311 shorter somehow sometimes?
312 -->
313
314 <!--
315 xsl for [2.4 Inserts]
316 -->
317
318 <!-- xsl for [2.4.1 Creating Elements] -->
319 <xsl:template match="xupdate:element">
320 <xsl:comment> 3.a. vivify generic node </xsl:comment>
321 <xsl:element name="xsl:element">
322 <xsl:copy-of select="@*"/>
323 <xsl:apply-templates />
324 </xsl:element>
325 </xsl:template>
326
327 <!-- xsl for [2.4.2 Creating Attributes] -->
328 <xsl:template match="xupdate:attribute">
329 <xsl:comment> 3.b. vivify node attributes </xsl:comment>
330 <xsl:element name="xsl:attribute">
331 <xsl:copy-of select="@*"/>
332 <xsl:apply-templates />
333 </xsl:element>
334 </xsl:template>
335
336 <!-- xsl for [2.4.3 Creating Text] -->
337 <xsl:template match="xupdate:text">
338 <xsl:comment> 4.a. vivify text node </xsl:comment>
339 <xsl:element name="xsl:text">
340 <xsl:copy-of select="@*"/>
341 <xsl:apply-templates />
342 </xsl:element>
343 </xsl:template>
344
345 <!-- xsl for [2.4.4 Creating Processing Instructions] -->
346 <xsl:template match="xupdate:processing-instruction">
347 <xsl:comment> 4.b. vivify PI node </xsl:comment>
348 <xsl:element name="xsl:processing-instruction">
349 <xsl:copy-of select="@*"/>
350 <xsl:apply-templates />
351 </xsl:element>
352 </xsl:template>
353
354 <!-- xsl for [2.4.5 Creating Comments] -->
355 <xsl:template match="xupdate:comment">
356 <xsl:comment> 4.c. vivify comment node </xsl:comment>
357 <xsl:element name="xsl:comment">
358 <xsl:copy-of select="@*"/>
359 <xsl:apply-templates />
360 </xsl:element>
361 </xsl:template>
362
363
364 <!--
365 xsl for [2.9 Variables and Values of Variables]
366 Encapsulates block payload into a named template.
367 -->
368 <xsl:template match="xupdate:variable">
369 <xsl:comment> 5.a. vivify xsl-element "variable" </xsl:comment>
370
371 <xsl:element name="xsl:template">
372 <xsl:attribute name="name">Variables</xsl:attribute>
373
374 <!--
375 <xsl:element name="xsl:variable">
376 <xsl:attribute name="name"><xsl:value-of select="@name" /></xsl:attribute>
377 -->
378
379 <xsl:choose>
380
381 <!-- Mode 1 [spec]: just evaluate as (sub-)selection if "select"-attribute is not empty -->
382 <xsl:when test="@select!=">
383 <xsl:element name="xsl:apply-templates">
384 <xsl:attribute name="select"><xsl:value-of select="@select" /></xsl:attribute>
385 </xsl:element>
386 </xsl:when>
387
388 <!-- Mode 2 [feature]: in other cases: pass thru the current node w/o any operation(s) on it -->
389 <xsl:otherwise>
390 <xsl:value-of select="." />
391 </xsl:otherwise>
392
393 </xsl:choose>
394
395 <!--
396 </xsl:element>
397 -->
398
399 </xsl:element>
400
401 </xsl:template>
402
403 <!--
404 xsl for [2.9 Variables and Values of Variables]
405 Calls encapsulated named template "Variables"
406 for each occourance of an "xupdate:value-of" element.
407 -->
408 <xsl:template match="xupdate:value-of">
409 <xsl:comment> 5.b. vivify xsl-element "value-of" </xsl:comment>
410 <xsl:element name="xsl:call-template">
411 <xsl:attribute name="name">Variables</xsl:attribute>
412 </xsl:element>
413
414 <!-- is this required any more??? -->
415 <xsl:element name="xsl:value-of">
416 <xsl:copy-of select="@*"/>
417 <!-- <xsl:apply-templates /> -->
418 <!-- this propagates the original content -->
419 <!-- <xsl:element name="xsl:apply-templates"> -->
420 <!-- <xsl:attribute name="" > -->
421 <!-- </xsl:element> -->
422 </xsl:element>
423 </xsl:template>
424
425
426 </xsl:stylesheet>
427

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