org.apache.solr.parser
Class SolrQueryParserBase

java.lang.Object
  org.apache.lucene.util.QueryBuilder
      org.apache.solr.parser.SolrQueryParserBase

Direct Known Subclasses:

QueryParser

public abstract class SolrQueryParserBase
extends QueryBuilder

This class is overridden by QueryParser in QueryParser.jj and acts to separate the majority of the Java code from the .jj grammar file.

Nested Class Summary

static class

SolrQueryParserBase.MagicFieldName Identifies the list of all known "magic fields" that trigger special parsing behavior

Field Summary

static QueryParser.Operator	AND_OPERATOR Alternative form of QueryParser.Operator.AND
protected String	explicitField
static QueryParser.Operator	OR_OPERATOR Alternative form of QueryParser.Operator.OR
protected QParser	parser
protected IndexSchema	schema

Constructor Summary

protected

SolrQueryParserBase()

Method Summary

protected void	addClause(List<BooleanClause> clauses, int conj, int mods, Query q)
protected String	analyzeIfMultitermTermText(String field, String part, FieldType fieldType)
static String	escape(String s) Returns a String where those characters that QueryParser expects to be escaped are escaped by a preceding \.
boolean	getAllowLeadingWildcard()
boolean	getAutoGeneratePhraseQueries()
protected Query	getBooleanQuery(List<BooleanClause> clauses) Factory method for generating query, given a set of clauses.
protected Query	getBooleanQuery(List<BooleanClause> clauses, boolean disableCoord) Factory method for generating query, given a set of clauses.
String	getDefaultField()
QueryParser.Operator	getDefaultOperator() Gets implicit operator setting, which will be either AND_OPERATOR or OR_OPERATOR.
String	getExplicitField() For a fielded query, returns the actual field specified (i.e.
String	getField(String fieldName) Handles the default field if null is passed
protected Query	getFieldQuery(String field, String queryText, boolean quoted)
protected Query	getFieldQuery(String field, String queryText, int slop) Base implementation delegates to getFieldQuery(String,String,boolean).
float	getFuzzyMinSim() Get the minimal similarity for fuzzy queries.
int	getFuzzyPrefixLength() Get the prefix length for fuzzy queries.
protected Query	getFuzzyQuery(String field, String termStr, float minSimilarity)
protected Query	getLocalParams(String qfield, String lparams)
MultiTermQuery.RewriteMethod	getMultiTermRewriteMethod()
int	getPhraseSlop() Gets the default slop for phrases.
protected Query	getPrefixQuery(String field, String termStr)
protected Query	getRangeQuery(String field, String part1, String part2, boolean startInclusive, boolean endInclusive)
protected Query	getRegexpQuery(String field, String termStr)
protected ReversedWildcardFilterFactory	getReversedWildcardFilterFactory(FieldType fieldType)
protected Query	getWildcardQuery(String field, String termStr)
void	init(Version matchVersion, String defaultField, QParser parser)
protected BooleanClause	newBooleanClause(Query q, BooleanClause.Occur occur) Builds a new BooleanClause instance
protected Query	newFieldQuery(Analyzer analyzer, String field, String queryText, boolean quoted)
protected Query	newFuzzyQuery(Term term, float minimumSimilarity, int prefixLength) Builds a new FuzzyQuery instance
protected Query	newMatchAllDocsQuery() Builds a new MatchAllDocsQuery instance
protected Query	newPrefixQuery(Term prefix) Builds a new PrefixQuery instance
protected Query	newRegexpQuery(Term regexp) Builds a new RegexpQuery instance
protected Query	newWildcardQuery(Term t) Builds a new WildcardQuery instance
Query	parse(String query) Parses a query string, returning a Query.
abstract void	ReInit(CharStream stream)
void	setAllowLeadingWildcard(boolean allowLeadingWildcard) Set to true to allow leading wildcard characters.
void	setAutoGeneratePhraseQueries(boolean value) Set to true if phrase queries will be automatically generated when the analyzer returns more than one term from whitespace delimited text.
void	setDefaultOperator(QueryParser.Operator op) Sets the boolean operator of the QueryParser.
void	setFuzzyMinSim(float fuzzyMinSim) Set the minimum similarity for fuzzy queries.
void	setFuzzyPrefixLength(int fuzzyPrefixLength) Set the prefix length for fuzzy queries.
void	setMultiTermRewriteMethod(MultiTermQuery.RewriteMethod method) By default QueryParser uses MultiTermQuery.CONSTANT_SCORE_AUTO_REWRITE_DEFAULT when creating a PrefixQuery, WildcardQuery or RangeQuery.
void	setPhraseSlop(int phraseSlop) Sets the default slop for phrases.
abstract Query	TopLevelQuery(String field)

Methods inherited from class org.apache.lucene.util.QueryBuilder

createBooleanQuery, createBooleanQuery, createFieldQuery, createMinShouldMatchQuery, createPhraseQuery, createPhraseQuery, getAnalyzer, getEnablePositionIncrements, newBooleanQuery, newMultiPhraseQuery, newPhraseQuery, newTermQuery, setAnalyzer, setEnablePositionIncrements

Methods inherited from class java.lang.Object

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

Field Detail

AND_OPERATOR

public static final QueryParser.Operator AND_OPERATOR

Alternative form of QueryParser.Operator.AND

OR_OPERATOR

public static final QueryParser.Operator OR_OPERATOR

Alternative form of QueryParser.Operator.OR

schema

protected IndexSchema schema

parser

protected QParser parser

explicitField

protected String explicitField

Constructor Detail

SolrQueryParserBase

protected SolrQueryParserBase()

Method Detail

ReInit

public abstract void ReInit(CharStream stream)

TopLevelQuery

public abstract Query TopLevelQuery(String field)
                             throws ParseException,
                                    SyntaxError

Throws:

ParseException

SyntaxError

init

public void init(Version matchVersion,
                 String defaultField,
                 QParser parser)

parse

public Query parse(String query)
            throws SyntaxError

Parses a query string, returning a Query.

Parameters:

query - the query string to be parsed.

Throws:

SyntaxError

getDefaultField

public String getDefaultField()

Returns:

Returns the default field.

getField

public String getField(String fieldName)

Handles the default field if null is passed

getExplicitField

public String getExplicitField()

For a fielded query, returns the actual field specified (i.e. null if default is being used) myfield:A or myfield:(A B C) will both return "myfield"

getAutoGeneratePhraseQueries

public final boolean getAutoGeneratePhraseQueries()

See Also:

setAutoGeneratePhraseQueries(boolean)

setAutoGeneratePhraseQueries

public final void setAutoGeneratePhraseQueries(boolean value)

Set to true if phrase queries will be automatically generated when the analyzer returns more than one term from whitespace delimited text. NOTE: this behavior may not be suitable for all languages.

Set to false if phrase queries should only be generated when surrounded by double quotes.

getFuzzyMinSim

public float getFuzzyMinSim()

Get the minimal similarity for fuzzy queries.

setFuzzyMinSim

public void setFuzzyMinSim(float fuzzyMinSim)

Set the minimum similarity for fuzzy queries. Default is 2f.

getFuzzyPrefixLength

public int getFuzzyPrefixLength()

Get the prefix length for fuzzy queries.

Returns:

Returns the fuzzyPrefixLength.

setFuzzyPrefixLength

public void setFuzzyPrefixLength(int fuzzyPrefixLength)

Set the prefix length for fuzzy queries. Default is 0.

Parameters:

fuzzyPrefixLength - The fuzzyPrefixLength to set.

setPhraseSlop

public void setPhraseSlop(int phraseSlop)

Sets the default slop for phrases. If zero, then exact phrase matches are required. Default value is zero.

getPhraseSlop

public int getPhraseSlop()

Gets the default slop for phrases.

setAllowLeadingWildcard

public void setAllowLeadingWildcard(boolean allowLeadingWildcard)

Set to true to allow leading wildcard characters.

When set, * or ? are allowed as the first character of a PrefixQuery and WildcardQuery. Note that this can produce very slow queries on big indexes.

Default: false.

getAllowLeadingWildcard

public boolean getAllowLeadingWildcard()

See Also:

setAllowLeadingWildcard(boolean)

setDefaultOperator

public void setDefaultOperator(QueryParser.Operator op)

Sets the boolean operator of the QueryParser. In default mode (OR_OPERATOR) terms without any modifiers are considered optional: for example capital of Hungary is equal to capital OR of OR Hungary.
In AND_OPERATOR mode terms are considered to be in conjunction: the above mentioned query is parsed as capital AND of AND Hungary

getDefaultOperator

public QueryParser.Operator getDefaultOperator()

Gets implicit operator setting, which will be either AND_OPERATOR or OR_OPERATOR.

setMultiTermRewriteMethod

public void setMultiTermRewriteMethod(MultiTermQuery.RewriteMethod method)

By default QueryParser uses MultiTermQuery.CONSTANT_SCORE_AUTO_REWRITE_DEFAULT when creating a PrefixQuery, WildcardQuery or RangeQuery. This implementation is generally preferable because it a) Runs faster b) Does not have the scarcity of terms unduly influence score c) avoids any "TooManyBooleanClauses" exception. However, if your application really needs to use the old-fashioned BooleanQuery expansion rewriting and the above points are not relevant then use this to change the rewrite method.

getMultiTermRewriteMethod

public MultiTermQuery.RewriteMethod getMultiTermRewriteMethod()

See Also:

setMultiTermRewriteMethod(org.apache.lucene.search.MultiTermQuery.RewriteMethod)

addClause

protected void addClause(List<BooleanClause> clauses,
                         int conj,
                         int mods,
                         Query q)

newFieldQuery

protected Query newFieldQuery(Analyzer analyzer,
                              String field,
                              String queryText,
                              boolean quoted)
                       throws SyntaxError

Throws:

SyntaxError

getFieldQuery

protected Query getFieldQuery(String field,
                              String queryText,
                              int slop)
                       throws SyntaxError

Base implementation delegates to getFieldQuery(String,String,boolean). This method may be overridden, for example, to return a SpanNearQuery instead of a PhraseQuery.

Throws:

SyntaxError

newBooleanClause

protected BooleanClause newBooleanClause(Query q,
                                         BooleanClause.Occur occur)

Builds a new BooleanClause instance

Parameters:

q - sub query

occur - how this clause should occur when matching documents

Returns:

new BooleanClause instance

newPrefixQuery

protected Query newPrefixQuery(Term prefix)

Builds a new PrefixQuery instance

Parameters:

prefix - Prefix term

Returns:

new PrefixQuery instance

newRegexpQuery

protected Query newRegexpQuery(Term regexp)

Builds a new RegexpQuery instance

Parameters:

regexp - Regexp term

Returns:

new RegexpQuery instance

newFuzzyQuery

protected Query newFuzzyQuery(Term term,
                              float minimumSimilarity,
                              int prefixLength)

Builds a new FuzzyQuery instance

Parameters:

term - Term

minimumSimilarity - minimum similarity

prefixLength - prefix length

Returns:

new FuzzyQuery Instance

newMatchAllDocsQuery

protected Query newMatchAllDocsQuery()

Builds a new MatchAllDocsQuery instance

Returns:

new MatchAllDocsQuery instance

newWildcardQuery

protected Query newWildcardQuery(Term t)

Builds a new WildcardQuery instance

Parameters:

t - wildcard term

Returns:

new WildcardQuery instance

getBooleanQuery

protected Query getBooleanQuery(List<BooleanClause> clauses)
                         throws SyntaxError

Factory method for generating query, given a set of clauses. By default creates a boolean query composed of clauses passed in. Can be overridden by extending classes, to modify query being returned.

Parameters:

clauses - List that contains BooleanClause instances to join.

Returns:

Resulting Query object.

Throws:

SyntaxError

getBooleanQuery

protected Query getBooleanQuery(List<BooleanClause> clauses,
                                boolean disableCoord)
                         throws SyntaxError

Factory method for generating query, given a set of clauses. By default creates a boolean query composed of clauses passed in. Can be overridden by extending classes, to modify query being returned.

Parameters:

clauses - List that contains BooleanClause instances to join.

disableCoord - true if coord scoring should be disabled.

Returns:

Resulting Query object.

Throws:

SyntaxError

escape

public static String escape(String s)

Returns a String where those characters that QueryParser expects to be escaped are escaped by a preceding \.

getReversedWildcardFilterFactory

protected ReversedWildcardFilterFactory getReversedWildcardFilterFactory(FieldType fieldType)

analyzeIfMultitermTermText

protected String analyzeIfMultitermTermText(String field,
                                            String part,
                                            FieldType fieldType)

getFieldQuery

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

Throws:

SyntaxError

getRangeQuery

protected Query getRangeQuery(String field,
                              String part1,
                              String part2,
                              boolean startInclusive,
                              boolean endInclusive)
                       throws SyntaxError

Throws:

SyntaxError

getPrefixQuery

protected Query getPrefixQuery(String field,
                               String termStr)
                        throws SyntaxError

Throws:

SyntaxError

getWildcardQuery

protected Query getWildcardQuery(String field,
                                 String termStr)
                          throws SyntaxError

Throws:

SyntaxError

getRegexpQuery

protected Query getRegexpQuery(String field,
                               String termStr)
                        throws SyntaxError

Throws:

SyntaxError

getFuzzyQuery

protected Query getFuzzyQuery(String field,
                              String termStr,
                              float minSimilarity)
                       throws SyntaxError

Throws:

SyntaxError

getLocalParams

protected Query getLocalParams(String qfield,
                               String lparams)
                        throws SyntaxError

Throws:

SyntaxError