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https://issues.apache.org/jira/browse/SOLR-8673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17245647#comment-17245647
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Mikhail Khludnev commented on SOLR-8673:
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Sorry to hear that, @thekabdude. I'm on it.
> o.a.s.search.facet classes not public/extendable
> ------------------------------------------------
>
> Key: SOLR-8673
> URL: https://issues.apache.org/jira/browse/SOLR-8673
> Project: Solr
> Issue Type: Improvement
> Components: Facet Module
> Affects Versions: 5.4.1
> Reporter: Markus Jelsma
> Priority: Major
> Fix For: 6.2, 7.0
>
> Attachments: SOLR-8673.patch, SOLR-8673.patch
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> It is not easy to create a custom JSON facet function. A simple function
> based on AvgAgg quickly results in the following compilation failures:
> {code}
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-compiler-plugin:3.3:compile (default-compile)
> on project openindex-solr: Compilation failure: Compilation failure:
> [ERROR]
> /home/markus/projects/openindex/solr/trunk/src/main/java/i.o.s.search/facet/CustomAvgAgg.java:[22,36]
> org.apache.solr.search.facet.FacetContext is not public in
> org.apache.solr.search.facet; cannot be accessed from outside package
> [ERROR]
> /home/markus/projects/openindex/solr/trunk/src/main/java/i.o.s.search/facet/CustomAvgAgg.java:[23,36]
> org.apache.solr.search.facet.FacetDoubleMerger is not public in
> org.apache.solr.search.facet; cannot be accessed from outside package
> [ERROR]
> /home/markus/projects/openindex/solr/trunk/src/main/java/i.o.s.search/facet/CustomAvgAgg.java:[40,32]
> cannot find symbol
> [ERROR] symbol: class FacetContext
> [ERROR] location: class i.o.s.search.facet.CustomAvgAgg
> [ERROR]
> /home/markus/projects/openindex/solr/trunk/src/main/java/i.o.s.search/facet/CustomAvgAgg.java:[49,39]
> cannot find symbol
> [ERROR] symbol: class FacetDoubleMerger
> [ERROR] location: class i.o.s.search.facet.CustomAvgAgg
> [ERROR]
> /home/markus/projects/openindex/solr/trunk/src/main/java/i.o.s.search/facet/CustomAvgAgg.java:[54,43]
> cannot find symbol
> [ERROR] symbol: class Context
> [ERROR] location: class i.o.s.search.facet.CustomAvgAgg.Merger
> [ERROR]
> /home/markus/projects/openindex/solr/trunk/src/main/java/i.o.s.search/facet/CustomAvgAgg.java:[41,16]
> cannot find symbol
> [ERROR] symbol: class AvgSlotAcc
> [ERROR] location: class i.o.s.search.facet.CustomAvgAgg
> [ERROR]
> /home/markus/projects/openindex/solr/trunk/src/main/java/i.o.s.search/facet/CustomAvgAgg.java:[46,12]
> incompatible types: i.o.s.search.facet.CustomAvgAgg.Merger cannot be
> converted to org.apache.solr.search.facet.FacetMerger
> [ERROR]
> /home/markus/projects/openindex/solr/trunk/src/main/java/i.o.s.search/facet/CustomAvgAgg.java:[53,5]
> method does not override or implement a method from a supertype
> [ERROR]
> /home/markus/projects/openindex/solr/trunk/src/main/java/i.o.s.search/facet/CustomAvgAgg.java:[60,5]
> method does not override or implement a method from a supertype
> {code}
> It seems lots of classes are tucked away in FacetModule, which we can't reach
> from outside.
> Originates from this thread:
> http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201602.mbox/%3ccab_8yd9ldbg_0zxm_h1igkfm6bqeypd5ilyy7tty8cztscv...@mail.gmail.com%3E
> ( also available at
> https://lists.apache.org/thread.html/9fddcad3136ec908ce1c57881f8d3069e5d153f08b71f80f3e18d995%401455019826%40%3Csolr-user.lucene.apache.org%3E
> )
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