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Posted to dev@lucene.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2014/03/20 20:16:44 UTC
[jira] [Commented] (LUCENE-4890) QueryTreeBuilder.getBuilder() only
finds interfaces on the most derived class
[ https://issues.apache.org/jira/browse/LUCENE-4890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13942162#comment-13942162 ]
ASF subversion and git services commented on LUCENE-4890:
---------------------------------------------------------
Commit 1579717 from [~mikemccand] in branch 'dev/branches/lucene_solr_3_6'
[ https://svn.apache.org/r1579717 ]
LUCENE-4890: get this test passing again
> QueryTreeBuilder.getBuilder() only finds interfaces on the most derived class
> -----------------------------------------------------------------------------
>
> Key: LUCENE-4890
> URL: https://issues.apache.org/jira/browse/LUCENE-4890
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/queryparser
> Affects Versions: 2.9, 2.9.1, 2.9.2, 2.9.3, 2.9.4, 3.0, 3.0.1, 3.0.2, 3.0.3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.6.1, 3.6.2
> Environment: Lucene 3.3.0 on Win32
> Reporter: Philip Searle
> Assignee: Adriano Crestani
> Priority: Minor
> Fix For: 3.6.3, 4.4, 5.0
>
> Attachments: LUCENE-4890_2013_05_25.patch
>
>
> QueryBuilder implementations registered with QueryTreeBuilder.setBuilder() are not recognized by QueryTreeBuilder.getBuilder() if they are registered for an interface implemented by a superclass. Registering them for a concrete query node class or an interface implemented by the most-derived class do work.
> {code:title=example.java|borderStyle=solid}
> /* Our custom query builder */
> class CustomQueryTreeBuilder extends QueryTreeBuilder {
> public CustomQueryTreeBuilder() {
> /* Turn field:"value" into an application-specific object */
> setBuilder(FieldQueryNode.class, new QueryBuilder() {
> @Override
> public Object build(QueryNode queryNode) {
> FieldQueryNode node = (FieldQueryNode) queryNode;
> return new ApplicationSpecificClass(node.getFieldAsString());
> }
> });
> /* Ignore all other query node types */
> setBuilder(QueryNode.class, new QueryBuilder() {
> @Override
> public Object build(QueryNode queryNode) {
> return null;
> }
> });
> }
> }
> /* Assume this is in the main program: */
> StandardQueryParser queryParser = new StandardQueryParser();
> queryParser.setQueryBuilder(new CustomQueryTreeBuilder());
> /* The following line will throw an exception because it can't find a builder for BooleanQueryNode.class */
> Object queryObject = queryParser.parse("field:\"value\" field2:\"value2\"", "field");
> {code}
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