org.apache.solr.util
Class SolrPluginUtils.DisjunctionMaxQueryParser

java.lang.Object
  org.apache.lucene.queryparser.classic.QueryParserBase
      org.apache.lucene.queryparser.classic.QueryParser
          org.apache.solr.search.SolrQueryParser
              org.apache.solr.util.SolrPluginUtils.DisjunctionMaxQueryParser

All Implemented Interfaces:

QueryParserConstants

Enclosing class:

SolrPluginUtils

public static class SolrPluginUtils.DisjunctionMaxQueryParser
extends SolrQueryParser

A subclass of SolrQueryParser that supports aliasing fields for constructing DisjunctionMaxQueries.

Nested Class Summary

protected static class

SolrPluginUtils.DisjunctionMaxQueryParser.Alias A simple container for storing alias info

Nested classes/interfaces inherited from class org.apache.solr.search.SolrQueryParser

SolrQueryParser.MagicFieldName

Nested classes/interfaces inherited from class org.apache.lucene.queryparser.classic.QueryParser

QueryParser.Operator

Nested classes/interfaces inherited from class org.apache.lucene.queryparser.classic.QueryParserBase

QueryParserBase.MethodRemovedUseAnother

Field Summary

protected Map<String,SolrPluginUtils.DisjunctionMaxQueryParser.Alias>

aliases Where we store a map from field name we expect to see in our query string, to Alias object containing the fields to use in our DisjunctionMaxQuery and the tiebreaker to use.

Fields inherited from class org.apache.solr.search.SolrQueryParser

defaultField, parser, schema

Fields inherited from class org.apache.lucene.queryparser.classic.QueryParser

jj_nt, token, token_source

Fields inherited from class org.apache.lucene.queryparser.classic.QueryParserBase

AND_OPERATOR, OR_OPERATOR

Fields inherited from interface org.apache.lucene.queryparser.classic.QueryParserConstants

_ESCAPED_CHAR, _NUM_CHAR, _QUOTED_CHAR, _TERM_CHAR, _TERM_START_CHAR, _WHITESPACE, AND, BAREOPER, Boost, CARAT, COLON, DEFAULT, EOF, FUZZY_SLOP, LPAREN, MINUS, NOT, NUMBER, OR, PLUS, PREFIXTERM, QUOTED, Range, RANGE_GOOP, RANGE_QUOTED, RANGE_TO, RANGEEX_END, RANGEEX_START, RANGEIN_END, RANGEIN_START, REGEXPTERM, RPAREN, STAR, TERM, tokenImage, WILDTERM

Constructor Summary

SolrPluginUtils.DisjunctionMaxQueryParser(QParser qp, String defaultField)

Method Summary

void	addAlias(String field, float tiebreaker, Map<String,Float> fieldBoosts) Add an alias to this query parser.
protected Query	getFieldQuery(String field, String queryText, boolean quoted) Delegates to the super class unless the field has been specified as an alias -- in which case we recurse on each of the aliased fields, and the results are composed into a DisjunctionMaxQuery.

Methods inherited from class org.apache.solr.search.SolrQueryParser

analyzeIfMultitermTermText, getPrefixQuery, getRangeQuery, getRegexpQuery, getReversedWildcardFilterFactory, getWildcardQuery

Methods inherited from class org.apache.lucene.queryparser.classic.QueryParser

Clause, Conjunction, disable_tracing, enable_tracing, generateParseException, getNextToken, getToken, Modifiers, Query, ReInit, ReInit, Term, TopLevelQuery

Methods inherited from class org.apache.lucene.queryparser.classic.QueryParserBase

addClause, analyzeMultitermTerm, escape, getAllowLeadingWildcard, getAnalyzer, getAnalyzeRangeTerms, getAutoGeneratePhraseQueries, getBooleanQuery, getBooleanQuery, getDateResolution, getDefaultOperator, getEnablePositionIncrements, getField, getFieldQuery, getFuzzyMinSim, getFuzzyPrefixLength, getFuzzyQuery, getLocale, getLowercaseExpandedTerms, getMultiTermRewriteMethod, getPhraseSlop, init, newBooleanClause, newBooleanQuery, newFieldQuery, newFuzzyQuery, newMatchAllDocsQuery, newMultiPhraseQuery, newPhraseQuery, newPrefixQuery, newRangeQuery, newRegexpQuery, newTermQuery, newWildcardQuery, parse, setAllowLeadingWildcard, setAnalyzeRangeTerms, setAutoGeneratePhraseQueries, setDateResolution, setDateResolution, setDefaultOperator, setEnablePositionIncrements, setFuzzyMinSim, setFuzzyPrefixLength, setLocale, setLowercaseExpandedTerms, setMultiTermRewriteMethod, setPhraseSlop

Methods inherited from class java.lang.Object

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

Field Detail

aliases

protected Map<String,SolrPluginUtils.DisjunctionMaxQueryParser.Alias> aliases

Where we store a map from field name we expect to see in our query string, to Alias object containing the fields to use in our DisjunctionMaxQuery and the tiebreaker to use.

Constructor Detail

SolrPluginUtils.DisjunctionMaxQueryParser

public SolrPluginUtils.DisjunctionMaxQueryParser(QParser qp,
                                                 String defaultField)

Method Detail

addAlias

public void addAlias(String field,
                     float tiebreaker,
                     Map<String,Float> fieldBoosts)

Add an alias to this query parser.

Parameters:

field - the field name that should trigger alias mapping

fieldBoosts - the mapping from fieldname to boost value that should be used to build up the clauses of the DisjunctionMaxQuery.

tiebreaker - to the tiebreaker to be used in the DisjunctionMaxQuery

See Also:

SolrPluginUtils.parseFieldBoosts(java.lang.String)

getFieldQuery

protected Query getFieldQuery(String field,
                              String queryText,
                              boolean quoted)
                       throws ParseException

Delegates to the super class unless the field has been specified as an alias -- in which case we recurse on each of the aliased fields, and the results are composed into a DisjunctionMaxQuery. (so yes: aliases which point at other aliases should work)

Overrides:

getFieldQuery in class SolrQueryParser

Throws:

ParseException