org.apache.solr.util

Class SolrPluginUtils.DisjunctionMaxQueryParser

java.lang.Object

org.apache.lucene.queryParser.QueryParser

org.apache.solr.search.SolrQueryParser

org.apache.solr.util.SolrPluginUtils.DisjunctionMaxQueryParser

All Implemented Interfaces:

org.apache.lucene.queryParser.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

Nested Classes

Modifier and Type	Class and Description
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.QueryParser

org.apache.lucene.queryParser.QueryParser.Operator

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Map<java.lang.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.QueryParser

AND_OPERATOR, jj_nt, OR_OPERATOR, token, token_source

Fields inherited from interface org.apache.lucene.queryParser.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, RangeEx, RANGEEX_END, RANGEEX_GOOP, RANGEEX_QUOTED, RANGEEX_START, RANGEEX_TO, RangeIn, RANGEIN_END, RANGEIN_GOOP, RANGEIN_QUOTED, RANGEIN_START, RANGEIN_TO, RPAREN, STAR, TERM, tokenImage, WILDTERM

Constructor Summary

Constructors

Constructor and Description
DisjunctionMaxQueryParser(IndexSchema s)
DisjunctionMaxQueryParser(IndexSchema s, java.lang.String defaultField)
DisjunctionMaxQueryParser(QParser qp, java.lang.String defaultField)

Method Summary

Modifier and Type	Method and Description
void	addAlias(java.lang.String field, float tiebreaker, java.util.Map<java.lang.String,java.lang.Float> fieldBoosts) Add an alias to this query parser.
protected org.apache.lucene.search.Query	getFieldQuery(java.lang.String field, java.lang.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, getReversedWildcardFilterFactory, getWildcardQuery

Methods inherited from class org.apache.lucene.queryParser.QueryParser

addClause, Clause, Conjunction, disable_tracing, enable_tracing, escape, generateParseException, getAllowLeadingWildcard, getAnalyzer, getAutoGeneratePhraseQueries, getBooleanQuery, getBooleanQuery, getDateResolution, getDefaultOperator, getEnablePositionIncrements, getField, getFieldQuery, getFieldQuery, getFuzzyMinSim, getFuzzyPrefixLength, getFuzzyQuery, getLocale, getLowercaseExpandedTerms, getMultiTermRewriteMethod, getNextToken, getPhraseSlop, getRangeCollator, getToken, main, Modifiers, newBooleanClause, newBooleanQuery, newFuzzyQuery, newMatchAllDocsQuery, newMultiPhraseQuery, newPhraseQuery, newPrefixQuery, newRangeQuery, newTermQuery, newWildcardQuery, parse, Query, ReInit, ReInit, setAllowLeadingWildcard, setAutoGeneratePhraseQueries, setDateResolution, setDateResolution, setDefaultOperator, setEnablePositionIncrements, setFuzzyMinSim, setFuzzyPrefixLength, setLocale, setLowercaseExpandedTerms, setMultiTermRewriteMethod, setPhraseSlop, setRangeCollator, Term, TopLevelQuery

Methods inherited from class java.lang.Object

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

Field Detail

aliases

protected java.util.Map<java.lang.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

DisjunctionMaxQueryParser

public DisjunctionMaxQueryParser(QParser qp,
                                 java.lang.String defaultField)

DisjunctionMaxQueryParser

public DisjunctionMaxQueryParser(IndexSchema s,
                                 java.lang.String defaultField)

DisjunctionMaxQueryParser

public DisjunctionMaxQueryParser(IndexSchema s)

Method Detail

addAlias

public void addAlias(java.lang.String field,
                     float tiebreaker,
                     java.util.Map<java.lang.String,java.lang.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 org.apache.lucene.search.Query getFieldQuery(java.lang.String field,
                                                       java.lang.String queryText,
                                                       boolean quoted)
                                                throws org.apache.lucene.queryParser.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:

org.apache.lucene.queryParser.ParseException