org.geotools.data
Interfaces 
AttributeReader
AttributeWriter
DataStore
DataStoreFactorySpi
FeatureListener
FeatureLock
FeatureLocking
FeatureReader
FeatureResults
FeatureSource
FeatureStore
FeatureWriter
FIDReader
FileDataStoreFactorySpi
LockingManager
Query
Repository
Transaction
Transaction.State
Classes 
AbstractAttributeIO
AbstractDataStore
AbstractDataStoreFactory
AbstractDataStoreTest
AbstractFeatureLocking
AbstractFeatureSource
AbstractFeatureStore
AbstractFileDataStore
CollectionFeatureReader
DataStoreFactorySpi.Param
DataStoreFinder
DataTestCase
DataUtilities
DataUtilities.AbstractFilterVisitor
DataUtilities.Traversal
DefaultFeatureLock
DefaultFeatureLockFactory
DefaultFeatureReader
DefaultFeatureResults
DefaultFIDReader
DefaultQuery
DefaultRepository
DefaultTransaction
Diff
DiffFeatureReader
DiffFeatureWriter
EmptyFeatureReader
EmptyFeatureWriter
FeatureEvent
FeatureListenerManager
FeatureLockFactory
FeatureLocking.Response
FeatureSourceRepository
FIDFeatureReader
FileDataStoreFinder
FilteringFeatureReader
FilteringFeatureWriter
InProcessLockingManager
JoiningAttributeReader
JoiningAttributeWriter
MaxFeatureReader
ReTypeFeatureReader
TransactionStateDiff
Exceptions 
DataSourceException
FeatureLockException
SchemaNotFoundException