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Posted to dev@cocoon.apache.org by Donald Ball <ba...@webslingerZ.com> on 2001/06/22 03:08:16 UTC
more data on the pattern matching bug
here's some more data on the pattern matching bug i've exposed. my sitemap
has these relevant pipelines:
<map:match pattern="*">
<map:aggregate element="root">
<map:part src="plain/meta"/>
<map:part src="plain/{1}"/>
</map:aggregate>
<map:act type="resource-exists">
<map:parameter name="url" value="context://style/{1}.xsl"/>
<map:transform src="style/{../1}.xsl"/>
</map:act>
<map:select>
<map:when test="wap">
<map:transform src="style/wziml-wml.xsl"/>
<mal:serialize type="wap"/>
</map:when>
<map:otherwise>
<map:transform src="style/wziml-html.xsl"/>
<map:serialize type="html"/>
</map:otherwise>
</map:select>
</map:match>
<map:match pattern="plain/*">
<map:generate src="content/{1}.xml" type="serverpages"/>
<map:serialize/>
</map:match>
this used to work fine, but now i'm getting the exceptions i described in
an earlier email. i put some debugging code in AbstractSitemap and i see
the following information for the sitemap above when i request 'clients':
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): ContentAggregator:
root element='root' ns='' prefix=''
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): Substituting string
plain/meta
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): List item:
{1=clients}
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): ContentAggregator:
part uri='plain/meta' element='' ns='' stripRootElement='' prefix=''
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): Substituting string
plain/{1}
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): List item:
{1=clients}
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): K: 0
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): S: 1
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): Map: {1=clients}
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): Val: clients
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): substitute evaluated
value for 1 as clients
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): ContentAggregator:
part uri='plain/clients' element='' ns='' stripRootElement='' prefix=''
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): Substituting string
context://style/{1}.xsl
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): List item:
{1=clients}
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): K: 0
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): S: 1
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): Map: {1=clients}
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): Val: clients
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): substitute evaluated
value for 1 as clients
WARN 56213 [cocoon ] (HttpProcessor[8080][4]): Looking up component
on an uninitialized ComponentManager: resource-exists
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): Action
((Action)this.actions.select( resource-exists )).act
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): Substituting string
context://style/{1}.xsl
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): List item:
{1=clients}
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): List item: {}
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): K: 1
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): S: 1
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): Map: {}
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): Val: null
ERROR 56213 [cocoon ] (HttpProcessor[8080][4]):
AbstractSitemap:substitute()
java.lang.NullPointerException
at
org.apache.cocoon.sitemap.AbstractSitemap.substitute(AbstractSitemap.java:298)
(the debugging code simply consists of printing the match expression and
iterating over the list of maps and printing them, and printing out the
variables relevant to the pattern resolution just before it tried to
evaluate it. nothing exotic.)
as you can see, it's calling AbstractSitemap.substitute _twice_ for the
context://style/{1}.xsl expression. the first time, it evalutes properly:
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): Substituting string
context://style/{1}.xsl
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): List item:
{1=clients}
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): K: 0
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): S: 1
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): Map: {1=clients}
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): Val: clients
DEBUG 56212 [cocoon ] (HttpProcessor[8080][4]): substitute evaluated
value for 1 as clients
but the second time it does not:
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): Substituting string
context://style/{1}.xsl
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): List item:
{1=clients}
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): List item: {}
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): K: 1
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): S: 1
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): Map: {}
DEBUG 56213 [cocoon ] (HttpProcessor[8080][4]): Val: null
ERROR 56213 [cocoon ] (HttpProcessor[8080][4]):
AbstractSitemap:substitute()
java.lang.NullPointerException
at
org.apache.cocoon.sitemap.AbstractSitemap.substitute(AbstractSitemap.java:298)
i believe the first time the substitute method is invoked is from the
sitemap, and the second time it's invoked is from the SourceResolver
that's passed to the ResourceExistsAction. what i _can't_ figure out is
why the context (e.g. the listOfMaps) would be any different in the one
place v.s. the other. but clearly this is a bug and needs to be addressed.
actually, on further reflection, i have no idea why this pattern is being
evaluated twice. it doesn't make any sense for it to ever be evaluted
outside of the ResourceExistsAction. does anyone have a clue?
(note this may or may not have anything to do with the context: url
changes - it's actually been a couple of days since i last updated this
particular webapp with the latest c2 and library changes.)
- donald
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