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From Apache Wiki <wikidi...@apache.org>
Subject [Cocoon Wiki] Update of "Logicsheets in Logicsheets" by VadimGritsenko
Date Wed, 10 Aug 2005 03:36:06 GMT
Dear Wiki user,

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The following page has been changed by VadimGritsenko:
http://wiki.apache.org/cocoon/Logicsheets_in_Logicsheets

The comment on the change is:
corrections

------------------------------------------------------------------------------
  
  According to Alfred, when two or more builtin logicsheets are used in an XSP page, "the
order [in which they get applied] is not defined since it is derived from the namespace declaration
on the xsp:page root element." (See Cocoon User mailing list. URL?) However if one logicsheet
is meant to produce XML that is to be transformed by another, the order of application must
be well-defined. Otherwise you may get a situation where an application works sometimes, or
even most of the time, but can fail at unpredictable moments.
  
- To solve this problem, you can put <xsp:logicsheet location="path/to/logicsheetA.xsl"/>
as a (the first?) child of <xsp:page>, where logicsheetA is the logicsheet that must
run first (because it produces output to be processed by another logicsheet). This tells the
logicsheet processor to run logicsheetA first. Examples for location:
+ To solve this problem, you can either put processing instruction <?xsp-logicsheet href="path/to/logicsheetA.xsl"?>
before <xsp:page>, or add element <xsp:logicsheet location="path/to/logicsheetA.xsl"/>
as the first child of <xsp:page>, where logicsheetA is the logicsheet that must run
first (because it produces output to be processed by another logicsheet). This tells the logicsheet
processor to add logicsheetA before adding any logcisheets referenced by xml namespace declarations.
Examples for href and location attributes:
  
   * location="path/to/logicsheetA.xsl" (a file path relative to current sitemap, or absolute)
  
@@ -21, +21 @@

   * location="cocoon://path/to/logicsheetA.xsl" (a pipeline URL relative to root sitemap)
  
  
- NB the xsp:logicsheet magic happens in o.a.c.components.language.markup.CocoonMarkupLanguage.
+ NB The xsp:logicsheet magic happens in o.a.c.components.language.markup.CocoonMarkupLanguage.CocoonTransformerChainBuilderFilter.
  
+ PS !AbstractMarkupLanguage.addLogicsheetsToGenerator is responsible for logicsheet application
order, I have not seen cases when it's not working ''-- [wiki:VadimGritsenko Vadim]''
+ 

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