Module org.apache.lucene.queries

Package org.apache.lucene.queries.function.valuesource

Class EnumFieldSource

java.lang.Object

org.apache.lucene.queries.function.ValueSource

org.apache.lucene.queries.function.valuesource.FieldCacheSource

org.apache.lucene.queries.function.valuesource.EnumFieldSource

public class EnumFieldSource
extends FieldCacheSource

Obtains int field values from LeafReader.getNumericDocValues(java.lang.String) and makes those values available as other numeric types, casting as needed. strVal of the value is not the int value, but its string (displayed) value

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final Integer	DEFAULT_VALUE
(package private) final Map<Integer,String>	enumIntToStringMap
(package private) final Map<String,Integer>	enumStringToIntMap

Fields inherited from class org.apache.lucene.queries.function.valuesource.FieldCacheSource

field

Constructor Summary

Constructors

Constructor	Description
EnumFieldSource(String field, Map<Integer,String> enumIntToStringMap, Map<String,Integer> enumStringToIntMap)

Method Summary

Modifier and Type	Method	Description
String	description()	description of field, used in explain()
boolean	equals(Object o)
FunctionValues	getValues(Map<Object,Object> context, LeafReaderContext readerContext)	Gets the values for this reader and the context that was previously passed to createWeight().
int	hashCode()
private String	intValueToStringValue(Integer intVal)
private Integer	stringValueToIntValue(String stringVal)
private static Integer	tryParseInt(String valueStr)

Methods inherited from class org.apache.lucene.queries.function.valuesource.FieldCacheSource

getField

Methods inherited from class org.apache.lucene.queries.function.ValueSource

asDoubleValuesSource, asLongValuesSource, createWeight, fromDoubleValuesSource, getSortField, newContext, toString

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_VALUE

static final Integer DEFAULT_VALUE

enumIntToStringMap

final Map<Integer,String> enumIntToStringMap

enumStringToIntMap

final Map<String,Integer> enumStringToIntMap

Constructor Details

EnumFieldSource

public EnumFieldSource(String field,
 Map<Integer,String> enumIntToStringMap,
 Map<String,Integer> enumStringToIntMap)

Method Details

tryParseInt

private static Integer tryParseInt(String valueStr)

intValueToStringValue

private String intValueToStringValue(Integer intVal)

stringValueToIntValue

private Integer stringValueToIntValue(String stringVal)

description

public String description()

Description copied from class: ValueSource

description of field, used in explain()

Overrides:

description in class FieldCacheSource

getValues

public FunctionValues getValues(Map<Object,Object> context,
 LeafReaderContext readerContext)
                         throws IOException

Description copied from class: ValueSource

Gets the values for this reader and the context that was previously passed to createWeight(). The values must be consumed in a forward docID manner, and you must call this method again to iterate through the values again.

Specified by:

getValues in class ValueSource

Throws:

IOException

equals

public boolean equals(Object o)

Overrides:

equals in class FieldCacheSource

hashCode

public int hashCode()

Overrides:

hashCode in class FieldCacheSource