org.apache.solr.util

Class SolrPluginUtils.DisjunctionMaxQueryParser

java.lang.Object

org.apache.solr.parser.SolrQueryParserBase

org.apache.solr.parser.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

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.parser.QueryParser

QueryParser.Operator

Nested classes/interfaces inherited from class org.apache.solr.parser.SolrQueryParserBase

SolrQueryParserBase.MagicFieldName

Field Summary

Fields

Modifier and Type	Field and Description
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.parser.QueryParser

jj_nt, token, token_source

Fields inherited from class org.apache.solr.parser.SolrQueryParserBase

analyzer, AND_OPERATOR, explicitField, OR_OPERATOR, parser, schema

Fields inherited from interface org.apache.solr.parser.QueryParserConstants

_ESCAPED_CHAR, _NUM_CHAR, _QUOTED_CHAR, _SQUOTED_CHAR, _TERM_CHAR, _TERM_START_CHAR, _WHITESPACE, AND, BAREOPER, Boost, CARAT, COLON, DEFAULT, EOF, FUZZY_SLOP, LPARAMS, 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

Constructors

Constructor and Description
SolrPluginUtils.DisjunctionMaxQueryParser(QParser qp, String defaultField)

Method Summary

Methods

Modifier and Type	Method and Description
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.parser.QueryParser

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

Methods inherited from class org.apache.solr.parser.SolrQueryParserBase

addClause, analyzeIfMultitermTermText, escape, getAllowLeadingWildcard, getAutoGeneratePhraseQueries, getBooleanQuery, getBooleanQuery, getDefaultField, getDefaultOperator, getEnablePositionIncrements, getExplicitField, getField, getFieldQuery, getFuzzyMinSim, getFuzzyPrefixLength, getFuzzyQuery, getLocalParams, getMultiTermRewriteMethod, getPhraseSlop, getPrefixQuery, getRangeQuery, getRegexpQuery, getReversedWildcardFilterFactory, getWildcardQuery, init, newBooleanClause, newBooleanQuery, newFieldQuery, newFuzzyQuery, newMatchAllDocsQuery, newMultiPhraseQuery, newPhraseQuery, newPrefixQuery, newRegexpQuery, newTermQuery, newWildcardQuery, parse, setAllowLeadingWildcard, setAutoGeneratePhraseQueries, setDefaultOperator, setEnablePositionIncrements, setFuzzyMinSim, setFuzzyPrefixLength, 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 SyntaxError

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 SolrQueryParserBase

Throws:

SyntaxError