org.apache.hadoop.io
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## Package `org.apache.hadoop.io`

Added Classes
`BloomMapFile` | This class extends MapFile and provides very much the same functionality.
`BloomMapFile.Reader` |
`BloomMapFile.Writer` |
`SecureIOUtils` | This class provides secure APIs for opening and creating files on the local disk.
`SecureIOUtils.AlreadyExistsException` | Signals that an attempt to create a file at a given pathname has failed because another file already existed at that path.

Changed Classes and Interfaces
ArrayFile.Writer | Write a new array file.
ArrayWritable | A Writable for arrays containing instances of a class.
BinaryComparable | Interface supported by org.apache.hadoop.io.WritableComparable types supporting ordering/permutation by a representative set of bytes.
BytesWritable | A byte sequence that is usable as a key or value.
DefaultStringifier | DefaultStringifier is the default implementation of the Stringifier interface which stringifies the objects using base64 encoding of the serialized version of the objects.
IOUtils | An utility class for I/O related functionality.
MD5Hash | A Writable for MD5 hash values.
MapFile | A file-based map from keys to values.
MapFile.Reader | Provide access to an existing map.
MapFile.Writer | Writes a new map.
MapWritable | A Writable Map.
MultipleIOException | Encapsulate a list of IOException into an IOException
RawComparator | A Comparator that operates directly on byte representations of objects.
SequenceFile.CompressionType | The compression type used to compress key/value pairs in the SequenceFile
SequenceFile.Metadata | The class encapsulating with the metadata of a file.
SequenceFile.Reader | Reads key/value pairs from a sequence-format file.
SequenceFile.Sorter | Sorts key/value pairs in a sequence-format file.
SequenceFile.Writer | Write key/value pairs to a sequence-format file.
SetFile.Writer | Write a new set file.
SortedMapWritable | A Writable SortedMap.
Stringifier | Stringifier interface offers two methods to convert an object to a string representation and restore the object given its string representation.
Text | This class stores text using standard UTF8 encoding.
WritableComparable | A Writable which is also Comparable
WritableComparator | A Comparator for
WritableFactories | Factories for non-public writables.
WritableName | Utility to permit renaming of Writable implementation classes without invalidiating files that contain their class name.
WritableUtils |

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