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See:
Description
Interface Summary | |
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Writable | A simple, efficient, serialization protocol, based on DataInput and
DataOutput . |
WritableComparable | An interface which extends both Writable and Comparable . |
WritableFactory | A factory for a class of Writable. |
Class Summary | |
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ArrayWritable | A Writable for arrays containing instances of a class. |
BooleanWritable | A WritableComparable for booleans. |
BooleanWritable.Comparator | A Comparator optimized for BooleanWritable. |
BytesWritable | A byte sequence that is usable as a key or value. |
BytesWritable.Comparator | A Comparator optimized for BytesWritable. |
CompressedWritable | A base-class for Writables which store themselves compressed and lazily inflate on field access. |
DataInputBuffer | A reusable DataInput implementation that reads from an in-memory
buffer. |
DataOutputBuffer | A reusable DataOutput implementation that writes to an in-memory
buffer. |
FloatWritable | A WritableComparable for floats. |
FloatWritable.Comparator | A Comparator optimized for FloatWritable. |
GenericWritable | A wrapper for Writable instances. |
IntWritable | A WritableComparable for ints. |
IntWritable.Comparator | A Comparator optimized for IntWritable. |
LongWritable | A WritableComparable for longs. |
LongWritable.Comparator | A Comparator optimized for LongWritable. |
LongWritable.DecreasingComparator | A decreasing Comparator optimized for LongWritable. |
MD5Hash | A Writable for MD5 hash values. |
MD5Hash.Comparator | A WritableComparator optimized for MD5Hash keys. |
NullWritable | Singleton Writable with no data. |
ObjectWritable | A polymorphic Writable that writes an instance with it's class name. |
Text | This class stores text using standard UTF8 encoding. |
Text.Comparator | A WritableComparator optimized for Text keys. |
TwoDArrayWritable | A Writable for 2D arrays containing a matrix of instances of a class. |
VersionedWritable | A base class for Writables that provides version checking. |
VIntWritable | A WritableComparable for integer values stored in variable-length format. |
VLongWritable | A WritableComparable for longs in a variable-length format. |
WritableComparator | A Comparator for WritableComparable s. |
WritableFactories | Factories for non-public writables. |
WritableName | Utility to permit renaming of Writable implementation classes without invalidiating files that contain their class name. |
WritableUtils |
Exception Summary | |
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VersionMismatchException | Thrown by VersionedWritable.readFields(DataInput) when the
version of an object being read does not match the current implementation
version as returned by VersionedWritable.getVersion() . |
Generic i/o code for use when reading and writing data to the network, to databases, and to files.
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