org.apache.lucene.search
Class TermRangeQuery

java.lang.Object
  org.apache.lucene.search.Query
      org.apache.lucene.search.MultiTermQuery
          org.apache.lucene.search.TermRangeQuery

All Implemented Interfaces:

Serializable, Cloneable

public class TermRangeQuery
extends MultiTermQuery

A Query that matches documents within an range of terms.

This query matches the documents looking for terms that fall into the supplied range according to String.compareTo(String), unless a Collator is provided. It is not intended for numerical ranges; use NumericRangeQuery instead.

This query uses the MultiTermQuery.CONSTANT_SCORE_AUTO_REWRITE_DEFAULT rewrite method.

Since:

2.9

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.search.MultiTermQuery

MultiTermQuery.ConstantScoreAutoRewrite, MultiTermQuery.RewriteMethod, MultiTermQuery.TopTermsBoostOnlyBooleanQueryRewrite, MultiTermQuery.TopTermsScoringBooleanQueryRewrite

Field Summary

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

CONSTANT_SCORE_AUTO_REWRITE_DEFAULT, CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE, CONSTANT_SCORE_FILTER_REWRITE, rewriteMethod, SCORING_BOOLEAN_QUERY_REWRITE

Constructor Summary

TermRangeQuery(String field, String lowerTerm, String upperTerm, boolean includeLower, boolean includeUpper)
Constructs a query selecting all terms greater/equal than lowerTerm but less/equal than upperTerm.

TermRangeQuery(String field, String lowerTerm, String upperTerm, boolean includeLower, boolean includeUpper, Collator collator)
Constructs a query selecting all terms greater/equal than lowerTerm but less/equal than upperTerm.

Method Summary

boolean	equals(Object obj)
Collator	getCollator() Returns the collator used to determine range inclusion, if any.
protected FilteredTermEnum	getEnum(IndexReader reader) Construct the enumeration to be used, expanding the pattern term.
String	getField() Returns the field name for this query
String	getLowerTerm() Returns the lower value of this range query
String	getUpperTerm() Returns the upper value of this range query
int	hashCode()
boolean	includesLower() Returns true if the lower endpoint is inclusive
boolean	includesUpper() Returns true if the upper endpoint is inclusive
String	toString(String field) Prints a user-readable version of this query.

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

clearTotalNumberOfTerms, getRewriteMethod, getTotalNumberOfTerms, incTotalNumberOfTerms, rewrite, setRewriteMethod

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

clone, combine, createWeight, extractTerms, getBoost, getSimilarity, mergeBooleanQueries, setBoost, toString, weight

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

TermRangeQuery

public TermRangeQuery(String field,
                      String lowerTerm,
                      String upperTerm,
                      boolean includeLower,
                      boolean includeUpper)

Constructs a query selecting all terms greater/equal than lowerTerm but less/equal than upperTerm.

If an endpoint is null, it is said to be "open". Either or both endpoints may be open. Open endpoints may not be exclusive (you can't select all but the first or last term without explicitly specifying the term to exclude.)

Parameters:

field - The field that holds both lower and upper terms.

lowerTerm - The term text at the lower end of the range

upperTerm - The term text at the upper end of the range

includeLower - If true, the lowerTerm is included in the range.

includeUpper - If true, the upperTerm is included in the range.

TermRangeQuery

public TermRangeQuery(String field,
                      String lowerTerm,
                      String upperTerm,
                      boolean includeLower,
                      boolean includeUpper,
                      Collator collator)

Constructs a query selecting all terms greater/equal than lowerTerm but less/equal than upperTerm.

If an endpoint is null, it is said to be "open". Either or both endpoints may be open. Open endpoints may not be exclusive (you can't select all but the first or last term without explicitly specifying the term to exclude.)

If collator is not null, it will be used to decide whether index terms are within the given range, rather than using the Unicode code point order in which index terms are stored.

WARNING: Using this constructor and supplying a non-null value in the collator parameter will cause every single index Term in the Field referenced by lowerTerm and/or upperTerm to be examined. Depending on the number of index Terms in this Field, the operation could be very slow.

Parameters:

lowerTerm - The Term text at the lower end of the range

upperTerm - The Term text at the upper end of the range

includeLower - If true, the lowerTerm is included in the range.

includeUpper - If true, the upperTerm is included in the range.

collator - The collator to use to collate index Terms, to determine their membership in the range bounded by lowerTerm and upperTerm.

Method Detail

getField

public String getField()

Returns the field name for this query

getLowerTerm

public String getLowerTerm()

Returns the lower value of this range query

getUpperTerm

public String getUpperTerm()

Returns the upper value of this range query

includesLower

public boolean includesLower()

Returns true if the lower endpoint is inclusive

includesUpper

public boolean includesUpper()

Returns true if the upper endpoint is inclusive

getCollator

public Collator getCollator()

Returns the collator used to determine range inclusion, if any.

getEnum

protected FilteredTermEnum getEnum(IndexReader reader)
                            throws IOException

Description copied from class: MultiTermQuery

Construct the enumeration to be used, expanding the pattern term.

Specified by:

getEnum in class MultiTermQuery

Throws:

IOException

toString

public String toString(String field)

Prints a user-readable version of this query.

Specified by:

toString in class Query

hashCode

public int hashCode()

Overrides:

hashCode in class MultiTermQuery

equals

public boolean equals(Object obj)

Overrides:

equals in class MultiTermQuery