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Description
Class Summary  

BoolFunction  Abstract parent class for those ValueSource implementations which
apply boolean logic to their values 
ByteFieldSource  Obtains int field values from the FieldCache
using getInts()
and makes those values available as other numeric types, casting as needed. 
BytesRefFieldSource  An implementation for retrieving FunctionValues instances for string based fields. 
ConstNumberSource  ConstNumberSource is the base class for all constant numbers 
ConstValueSource  ConstValueSource returns a constant for all documents 
DefFunction  ValueSource implementation which only returns the values from the provided
ValueSources which are available for a particular docId. 
DivFloatFunction  Function to divide "a" by "b" 
DocFreqValueSource  DocFreqValueSource returns the number of documents containing the term. 
DoubleConstValueSource  Function that returns a constant double value for every document. 
DoubleFieldSource  Obtains float field values from the FieldCache
using getFloats()
and makes those values available as other numeric types, casting as needed. 
DualFloatFunction  Abstract ValueSource implementation which wraps two ValueSources
and applies an extendible float function to their values. 
FieldCacheSource  A base class for ValueSource implementations that retrieve values for
a single field from the FieldCache . 
FloatFieldSource  Obtains float field values from the FieldCache
using getFloats()
and makes those values available as other numeric types, casting as needed. 
IDFValueSource  Function that returns #idf(long, long)
for every document. 
IfFunction  Depending on the boolean value of the ifSource function,
returns the value of the trueSource or falseSource function. 
IntFieldSource  Obtains int field values from the FieldCache
using getInts()
and makes those values available as other numeric types, casting as needed. 
JoinDocFreqValueSource  Use a field value and find the Document Frequency within another field. 
LinearFloatFunction  LinearFloatFunction implements a linear function over
another ValueSource . 
LiteralValueSource  Pass a the field value through as a String, no matter the type // Q: doesn't this mean it's a "string"? 
LongFieldSource  Obtains float field values from the FieldCache
using getFloats()
and makes those values available as other numeric types, casting as needed. 
MaxDocValueSource  Returns the value of IndexReader.maxDoc()
for every document. 
MaxFloatFunction  MaxFloatFunction returns the max of it's components. 
MinFloatFunction  MinFloatFunction returns the min of it's components. 
MultiBoolFunction  Abstract ValueSource implementation which wraps multiple ValueSources
and applies an extendible boolean function to their values. 
MultiFloatFunction  Abstract ValueSource implementation which wraps multiple ValueSources
and applies an extendible float function to their values. 
MultiFunction  Abstract parent class for ValueSource implementations that wrap multiple
ValueSources and apply their own logic. 
MultiValueSource  A ValueSource that abstractly represents ValueSource s for
poly fields, and other things. 
NormValueSource  Function that returns TFIDFSimilarity.decodeNormValue(byte)
for every document. 
NumDocsValueSource  Returns the value of IndexReader.numDocs()
for every document. 
OrdFieldSource  Obtains the ordinal of the field value from the default Lucene FieldCache using getStringIndex(). 
PowFloatFunction  Function to raise the base "a" to the power "b" 
ProductFloatFunction  ProductFloatFunction returns the product of it's components. 
QueryValueSource  QueryValueSource returns the relevance score of the query 
RangeMapFloatFunction  LinearFloatFunction implements a linear function over
another ValueSource . 
ReciprocalFloatFunction  ReciprocalFloatFunction implements a reciprocal function f(x) = a/(mx+b), based on
the float value of a field or function as exported by ValueSource . 
ReverseOrdFieldSource  Obtains the ordinal of the field value from the default Lucene FieldCache using getTermsIndex()
and reverses the order. 
ScaleFloatFunction  Scales values to be between min and max. 
ShortFieldSource  Obtains short field values from the FieldCache
using getShorts()
and makes those values available as other numeric types, casting as needed. 
SimpleBoolFunction  BoolFunction implementation which applies an extendible boolean
function to the values of a single wrapped ValueSource . 
SimpleFloatFunction  A simple float function with a single argument 
SingleFunction  A function with a single argument 
SumFloatFunction  SumFloatFunction returns the sum of it's components. 
SumTotalTermFreqValueSource  SumTotalTermFreqValueSource returns the number of tokens. 
TermFreqValueSource  Function that returns DocsEnum.freq() for the
supplied term in every document. 
TFValueSource  Function that returns TFIDFSimilarity.tf(int)
for every document. 
TotalTermFreqValueSource  TotalTermFreqValueSource returns the total term freq
(sum of term freqs across all documents). 
VectorValueSource  Converts individual ValueSource instances to leverage the FunctionValues *Val functions that work with multiple values, i.e. 
A variety of functions to use with FunctionQuery.


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