org.apache.lucene.search
Class TermRangeFilter

java.lang.Object
  org.apache.lucene.search.Filter
      org.apache.lucene.search.MultiTermQueryWrapperFilter<TermRangeQuery>
          org.apache.lucene.search.TermRangeFilter

All Implemented Interfaces:

Serializable

public class TermRangeFilter
extends MultiTermQueryWrapperFilter<TermRangeQuery>

A Filter that restricts search results to a range of term values in a given field.

This filter 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 NumericRangeFilter instead.

If you construct a large number of range filters with different ranges but on the same field, FieldCacheRangeFilter may have significantly better performance.

Since:

2.9

See Also:

Serialized Form

Field Summary

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

query

Constructor Summary

TermRangeFilter(String fieldName, String lowerTerm, String upperTerm, boolean includeLower, boolean includeUpper)

TermRangeFilter(String fieldName, String lowerTerm, String upperTerm, boolean includeLower, boolean includeUpper, Collator collator)
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.

Method Summary

Collator	getCollator() Returns the collator used to determine range inclusion, if any.
String	getField() Returns the field name for this filter
String	getLowerTerm() Returns the lower value of this range filter
String	getUpperTerm() Returns the upper value of this range filter
boolean	includesLower() Returns true if the lower endpoint is inclusive
boolean	includesUpper() Returns true if the upper endpoint is inclusive
static TermRangeFilter	Less(String fieldName, String upperTerm) Constructs a filter for field fieldName matching less than or equal to upperTerm.
static TermRangeFilter	More(String fieldName, String lowerTerm) Constructs a filter for field fieldName matching greater than or equal to lowerTerm.

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

clearTotalNumberOfTerms, equals, getDocIdSet, getTotalNumberOfTerms, hashCode, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

TermRangeFilter

public TermRangeFilter(String fieldName,
                       String lowerTerm,
                       String upperTerm,
                       boolean includeLower,
                       boolean includeUpper)

Parameters:

fieldName - The field this range applies to

lowerTerm - The lower bound on this range

upperTerm - The upper bound on this range

includeLower - Does this range include the lower bound?

includeUpper - Does this range include the upper bound?

Throws:

IllegalArgumentException - if both terms are null or if lowerTerm is null and includeLower is true (similar for upperTerm and includeUpper)

TermRangeFilter

public TermRangeFilter(String fieldName,
                       String lowerTerm,
                       String upperTerm,
                       boolean includeLower,
                       boolean includeUpper,
                       Collator collator)

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 lower bound on this range

upperTerm - The upper bound on this range

includeLower - Does this range include the lower bound?

includeUpper - Does this range include the upper bound?

collator - The collator to use when determining range inclusion; set to null to use Unicode code point ordering instead of collation.

Throws:

IllegalArgumentException - if both terms are null or if lowerTerm is null and includeLower is true (similar for upperTerm and includeUpper)

Method Detail

Less

public static TermRangeFilter Less(String fieldName,
                                   String upperTerm)

Constructs a filter for field fieldName matching less than or equal to upperTerm.

More

public static TermRangeFilter More(String fieldName,
                                   String lowerTerm)

Constructs a filter for field fieldName matching greater than or equal to lowerTerm.

getField

public String getField()

Returns the field name for this filter

getLowerTerm

public String getLowerTerm()

Returns the lower value of this range filter

getUpperTerm

public String getUpperTerm()

Returns the upper value of this range filter

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.