[jira] [Created] (SOLR-9275) make XML Query Parser support extensible-via-configuration

["Christine Poerschke (JIRA)" <ji...@apache.org>]

Christine Poerschke created SOLR-9275:
-----------------------------------------

             Summary: make XML Query Parser support extensible-via-configuration
                 Key: SOLR-9275
                 URL: https://issues.apache.org/jira/browse/SOLR-9275
             Project: Solr
          Issue Type: New Feature
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Christine Poerschke
            Assignee: Christine Poerschke
            Priority: Minor


SOLR-839 added XML QueryParser support (deftype=xmlparser) and this ticket here proposes to make that support extensible-via-configuration.

Objective:
 * To support use of custom query builders.
 * To support use of custom query builders _without_ a corresponding custom XmlQParser plugin class.

Illustration:
 * solrconfig.xml snippet to configure use of the custom builders
{code}
<queryParser name="testxmlparser" class="XmlQParserPlugin">
  <str name="HelloQuery">org.apache.solr.search.HelloQueryBuilder</str>
  <str name="GoodbyeQuery">org.apache.solr.search.GoodbyeQueryBuilder</str>
</queryParser>
{code}
* HelloQueryBuilder and GoodbyeQueryBuilder both extend the new abstract SolrQueryBuilder class.
{code}
+ public abstract class SolrQueryBuilder implements QueryBuilder {
+   protected final SolrQueryRequest req;
+   protected final QueryBuilder queryFactory;
+   public SolrQueryBuilder(String defaultField, Analyzer analyzer,
+       SolrQueryRequest req, QueryBuilder queryFactory) {
+     this.req = req;
+     this.queryFactory = queryFactory;
+   }
+ }
{code}



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