Hello.
I have been beating my head around the data-config.xml listed
at the end of this message. It breaks in a few different ways.
1) I have bodged TemplateTransformer to allow it to return
when one of the variables is undefined. This ensures my
uniqueKey is always defined. But thinking more on
Nobel's comments there is use in having it work both ways.
ie leaving the column undefined or replacing the variable
with "". I still like my idea about using the default
value of a solr field from schema.xml, but I cant figure
out how/where to best implement it.
2) Having used TemplateTransformer to assign a value to an
entity column that column cannot be used in other
TemplateTransformer operations. In my project I am
attempting to reuse "x.fileWebPath". To fix this, the
last line of transformRow() in TemplateTransformer.java
needs replaced with the following which as well as
'putting' the templated-ed string in 'row' also saves it
into the 'resolver'.
**originally**
row.put(column, resolver.replaceTokens(expr));
}
**new**
String columnName = map.get(DataImporter.COLUMN);
expr=resolver.replaceTokens(expr);
row.put(columnName, expr);
resolverMapCopy.put(columnName, expr);
}
As an aside I think I ran into the issues covered by
SOLR-993. It took a while to figure out I could not a
a single columnname/value to the resolver. I had instead
to add to the map that was already stored within the
resolver.
3) No entity column names can be used within RegexTransformer.
I guess all the stuff that was added to TemplateTransformer
to allow column names to be used in templates needs re-added
into RegexTransformer. I am doing that now... but am confused
by the fragment of code which copies from resolverMap into
resolverMapCopy. As best I can see resolverMap is always
empty; but I am barely able to follow the code! Can somebody
explain when/why resolverMap would be populated.
Also, I begin to understand comments made by Noble in
SOL-1001 about resolving "entity attributes in
ContextImpl.getEntityAttribute" and I guess Shalin was
right as well. However it also seems wrong that at the
top of every transformer we are going to repeat the
same code to load the resolver with information about the
entity.
4) In that I am reusing template output within other templates
the order of execution becomes important. Can I assume that
the explicitly listed columns in an entity are processed by
the various transformers in the order they appear within
data-config.xml. I *think* that the list of columns within
an entity as returned by getAllEntityFields() is actually
an ArrayList which I think or order dependent. IS this
correct?
5) Should I raise this as a single JIRA issue?
6) Having played with this stuff, I was going to add a bit
more to the wiki highlighting some of the possibilities
and issues with transformers. But want to check with the
list first!
<dataConfig>
<dataSource name="myfilereader" type="FileDataSource"/>
<document>
<entity name="jc"
processor="FileListEntityProcessor"
fileName="^.*\.xml$"
newerThan="'NOW-1000DAYS'"
recursive="true"
rootEntity="false"
dataSource="null"
baseDir="/Volumes/spare/ts/solr/content"
>
<entity name="x"
dataSource="myfilereader"
processor="XPathEntityProcessor"
url="${jc.fileAbsolutePath}"
rootEntity="true"
stream="false"
forEach="/record | /record/mediaBlock"
transformer="DateFormatTransformer,TemplateTransformer,RegexTransformer">
<field column="fileAbsolutePath" template="${jc.fileAbsolutePath}" />
<field column="fileWebPath" regex="${x.test}(.*)"
replaceWith="/ford$1" sourceColName="fileAbsolutePath"/>
<field column="title" xpath="/record/title" />
<field column="para1" name="para" xpath="/record/sect1/para" />
<field column="para2" name="para" xpath="/record/list/listitem/para" />
<field column="pubdate"
xpath="/record/metadata/da...@qualifier='pubDate']" dateTimeFormat="yyyyMMdd"
/>
<field column="vurl"
xpath="/record/mediaBlock/mediaObject/@vurl" />
<field column="imgSrcArticle"
template="${dataimporter.request.fordinstalldir}" />
<field column="imgCpation" xpath="/record/mediaBlock/caption" />
<field column="test"
template="${dataimporter.request.contentinstalldir}" />
<!-- **problem is that vurl is just a fragment of the info needed to access the
picture. -->
<field column="imgWebPathICON" regex="(.*)/.*"
replaceWith="$1/imagery/${x.vurl}s.jpg" sourceColName="fileWebPath"/>
<field column="imgWebPathFULL" regex="(.*)/.*"
replaceWith="$1/imagery/${x.vurl}.jpg" sourceColName="fileWebPath"/>
<field column="vdkvgwkey"
template="${jc.fileAbsolutePath}#${x.vurl}" />
</entity>
</entity>
</document>
</dataConfig>
Regards Fergus.
--
===============================================================
Fergus McMenemie Email:fer...@twig.me.uk
Techmore Ltd Phone:(UK) 07721 376021
Unix/Mac/Intranets Analyst Programmer
===============================================================
