Package org.apache.solr.search

Class SolrSearcherRequirementDetector

java.lang.Object

org.apache.lucene.search.QueryVisitor

org.apache.solr.search.SolrSearcherRequirementDetector

public class SolrSearcherRequirementDetector
extends org.apache.lucene.search.QueryVisitor

Detects whether a query can be run using a standard Lucene IndexSearcher

Some Solr Query implementations are written to assume access to a SolrIndexSearcher. But these objects aren't always available: some code-paths (e.g. when executing a "delete-by-query") execute the query using the standard IndexSearcher available in Lucene. This QueryVisitor allows code to detect whether a given Query requires SolrIndexSearcher or not.

Instances should not be reused for multiple query-tree inspections.

See Also:

SolrSearcherRequirer

WARNING: This API is experimental and might change in incompatible ways in the next release.

Field Summary

Fields inherited from class org.apache.lucene.search.QueryVisitor

EMPTY_VISITOR

Constructor Summary

Constructors

Constructor	Description
SolrSearcherRequirementDetector()

Method Summary

Modifier and Type	Method	Description
boolean	getRequiresSolrSearcher()
org.apache.lucene.search.QueryVisitor	getSubVisitor(org.apache.lucene.search.BooleanClause.Occur occur, org.apache.lucene.search.Query parent)
void	visitLeaf(org.apache.lucene.search.Query query)

Methods inherited from class org.apache.lucene.search.QueryVisitor

acceptField, consumeTerms, consumeTermsMatching, termCollector

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SolrSearcherRequirementDetector

public SolrSearcherRequirementDetector()

Method Detail

getSubVisitor

public org.apache.lucene.search.QueryVisitor getSubVisitor(org.apache.lucene.search.BooleanClause.Occur occur,
                                                           org.apache.lucene.search.Query parent)

Overrides:

getSubVisitor in class org.apache.lucene.search.QueryVisitor

visitLeaf

public void visitLeaf(org.apache.lucene.search.Query query)

Overrides:

visitLeaf in class org.apache.lucene.search.QueryVisitor

getRequiresSolrSearcher

public boolean getRequiresSolrSearcher()