org.geotools.data
Interfaces 
AttributeReader
AttributeWriter
Catalog
DataStore
DataStoreFactorySpi
FeatureListener
FeatureLocking
FeatureReader
FeatureResults
FeatureSource
FeatureStore
FeatureWriter
FIDReader
LockingManager
Transaction
Transaction.State
Classes 
AbstractAttributeIO
AbstractDataStore
AbstractFeatureLocking
AbstractFeatureSource
AbstractFeatureStore
DataStoreFactorySpi.Param
DataStoreFinder
DataTestCase
DataUtilities
DataUtilities.AbstractFilterVisitor
DataUtilities.Traversal
DefaultCatalog
DefaultFeatureReader
DefaultFeatureResults
DefaultFIDReader
DefaultTransaction
DiffFeatureReader
DiffFeatureWriter
EmptyFeatureReader
EmptyFeatureWriter
FeatureEvent
FeatureListenerManager
FeatureLocking.Response
FIDFeatureReader
FilteringFeatureReader
FilteringFeatureWriter
InProcessLockingManager
JoiningAttributeReader
JoiningAttributeWriter
MaxFeatureReader
ReTypeFeatureReader
TransactionStateDiff
Exceptions 
FeatureLockException
SchemaNotFoundException