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https://issues.apache.org/jira/browse/SOLR-1387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12751032#action_12751032
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Anil Khadka commented on SOLR-1387:
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I've come up with following code. Any suggestions??
[This is just a code snippet]
{code:title=Extension of SimpleFacet.java|borderStyle=solid}
/*** SEARCHING ***/
// HashSet is choosen to avoid duplicate entry
HashSet<String> termsDump = new HashSet<String>();
for (String term: terms ) { //<------ terms[] from FieldCache.DEFAULT ...
StringIndex.loopup
if (term == null ) continue;
for (String p : iprefixList) { //<--- list of prefix to be search case
insensitively.
// doing iprefix
if (term.toUpperCase().startsWith(p.toUpperCase())) { //<---- Is this
the best way to do??
termsDump.add(term);
}
}
for (String re: regexList) { // <--- list of regular expression
if (term.matches(re)) {
//equivalent to Pattern.compile(re).matcher(term).matches()
termsDump.add(term);
}
}
}
// Just add the list of input terms without searching :)
termsDump.addAll(inputTermsList);
/*** COUNTING ***/ // <-- this counting method is different from regular prefix
(finding spectrum in an array)
FieldType ft = searcher.getSchema().getFieldType(field);
NamedList<Integer> res = new NamedList();
Term t = new Term(field);
for (String term : termList) { // <---- termList = termsDump from above
String internal = ft.toInternal(term);
int count = searcher.numDocs(new TermQuery(t.createTerm(internal)),
base); // <--- Do we loose performance on this??
res.add(term, count);
}
/*** SORTING ***/ // <-- regular CountPair<String,Integer> thing.
for (int i = 0, n= nList.size(); i <n; i++){
queue.add(new CountPair<String,Integer>(res.getName(i),
res.getVal(i)));
}
{code}
The syntax would look like (localParams style) this:
{code}
&facet.field={!XFilter=on prefix=A,B,C iPrefix=a,b,c,d termsList=e,f,g,h
regex=^a[a-z0-9]+g$,z*}field_name
{code}
XFilter: i called this eXtended Filter for facet!!
> Add more search options for filtering facets.
> ---------------------------------------------
>
> Key: SOLR-1387
> URL: https://issues.apache.org/jira/browse/SOLR-1387
> Project: Solr
> Issue Type: New Feature
> Components: search
> Affects Versions: 1.4
> Reporter: Anil Khadka
>
> Currently for filtering the facets, we have to use prefix (which use
> String.startsWith() in java).
> We can add some parameters like
> * facet.iPrefix : this would act like case-insensitive search. (or --->
> facet.prefix=a&facet.caseinsense=on)
> * facet.regex : this is pure regular expression search (which obviously would
> be expensive if issued).
> Moreover, allowing multiple filtering for same field would be great like
> facet.prefix=a OR facet.prefix=A ... sth like this.
> All above concepts could be equally applicable to TermsComponent.
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