org.geotools.filter
Interfaces 
BetweenFilter
CompareFilter
EnvironmentVariable
FidFilter
Filter
FilterFactory
FilterHandler
FilterType
FilterVisitor
GeometryDistanceFilter
GeometryFilter
LikeFilter
LogicFilter
MapScaleDenominator
NullFilter
SortBy
SortBy2
Classes 
AbstractFilter
AbstractFilterImpl
AndImpl
AreaFunction
AttributeExpressionImpl
AttributeExpressionImpl2
BBoxExpressionImpl
BetweenFilterImpl
BinaryComparisonAbstract
BinaryLogicAbstract
CartesianDistanceFilter
CompareFilterImpl
DefaultExpression
Expr
ExpressionBuilder
ExpressionDOMParser
ExpressionSAXParser
FidFilterImpl
FilterAbstract
FilterAttributeExtractor
FilterCapabilities
FilterCapabilitiesMask
FilterDOMParser
FilterFactoryFinder
FilterFactoryImpl
FilterFilter
FilteringIteration
Filters
FilterSAXParser
FilterTransformer
FilterTransformer.FilterTranslator
FilterVisitorFilterWrapper
FunctionExpressionImpl
GeometryEncoderSDE
GeometryExpressionImpl
GeometryFilterImpl
HsqlFilterFactoryImpl
IsBetweenImpl
IsEqualsToImpl
IsGreaterThanImpl
IsGreaterThanOrEqualToImpl
IsLessThenImpl
IsLessThenOrEqualToImpl
IsNotEqualToImpl
IsNullImpl
LengthFunction
LikeFilterImpl
LiteralExpressionImpl
LogicFilterImpl
LogicSAXParser
MapScaleDenominatorImpl
MathExpressionImpl
MaxFunction
MinFunction
NotImpl
NullFilterImpl
OrImpl
SortOrder
SQLEncoder
SQLEncoderBBOX
SQLEncoderHsql
SQLEncoderLocationsXY
SQLEncoderMySQL
SQLEncoderOracle
SQLEncoderPostgis
SQLEncoderPostgisGeos
SQLEncoderSDE
SQLUnpacker
XMLEncoder
Exceptions 
FilterFactoryCreationException
GeometryEncoderException
IllegalFilterException
MalformedFilterException
SQLEncoderException