@LimitedPrivate("Filesystems") @Unstable

Package org.apache.hadoop.fs.impl

This package contains implementation classes for use inside filesystems. These classes MUST NOT be directly exposed as the arguments or return values of methods, or as part of a visible inheritance tree. These classes MAY be returned behind interfaces. When such interfaces are used as parameters, the methods which accept the interfaces MUST NOT cast them to the classes contained therein: they MUST interact purely through the interface. That is: don't expose the implementation classes in here, and don't expect input interface implementations to always be the classes in here. These classes are for the private use of FileSystem/ FileContext implementations. Implementation classes not developed within the ASF Hadoop codebase MAY use these, with the caveat that these classes are highly unstable.

Interface Summary

Interface	Description
FsLinkResolution.FsLinkResolutionFunction<T>	The signature of the function to invoke.
FunctionsRaisingIOE.BiFunctionRaisingIOE<T,U,R>	Deprecated. use BiFunctionRaisingIOE
FunctionsRaisingIOE.CallableRaisingIOE<R>	Deprecated. use CallableRaisingIOE
FunctionsRaisingIOE.FunctionRaisingIOE<T,R>	Deprecated. use FunctionRaisingIOE

Class Summary

Class	Description
AbstractFSBuilderImpl<S,B extends FSBuilder<S,B>>	Builder for filesystem/filecontext operations of various kinds, with option support.
AbstractMultipartUploader	Standard base class for Multipart Uploaders.
BackReference	Holds reference to an object to be attached to a stream or store to avoid the reference being lost to GC.
CombinedFileRange	A file range that represents a set of underlying file ranges.
DefaultBulkDeleteOperation	Default implementation of the BulkDelete interface.
FileRangeImpl	A range of bytes from a file with an optional buffer to read those bytes for zero copy.
FileSystemMultipartUploader	A MultipartUploader that uses the basic FileSystem commands.
FileSystemMultipartUploaderBuilder	Builder for FileSystemMultipartUploader.
FlagSet<E extends java.lang.Enum<E>>	A set of flags, constructed from a configuration option or from a string, with the semantics of ConfigurationHelper.parseEnumSet(String, String, Class, boolean) and implementing StreamCapabilities.
FSBuilderSupport	Class to help with use of FSBuilder.
FsLinkResolution<T>	Class to allow Lambda expressions to be used in FileContext link resolution.
FunctionsRaisingIOE	Deprecated. use org.apache.hadoop.util.functional
FutureDataInputStreamBuilderImpl	Builder for input streams and subclasses whose return value is actually a completable future: this allows for better asynchronous operation.
FutureIOSupport	Deprecated.
MultipartUploaderBuilderImpl<S extends MultipartUploader,B extends MultipartUploaderBuilder<S,B>>	Builder for MultipartUploader implementations.
OpenFileParameters	All the parameters from the openFile builder for the openFileWithOptions commands.
PathCapabilitiesSupport
StoreImplementationUtils	Utility classes to help implementing filesystems and streams.
WeakReferenceThreadMap<V>	A WeakReferenceMap for threads.
WeakRefMetricsSource	A weak referenced metrics source which avoids hanging on to large objects if somehow they don't get fully closed/cleaned up.

Exception Summary

Exception	Description
WrappedIOException	Deprecated. use the UncheckedIOException directly.]