Uses of Interface
org.apache.hadoop.io.WritableComparable

Packages that use WritableComparable
org.apache.hadoop.contrib.index.mapred   
org.apache.hadoop.examples Hadoop example code. 
org.apache.hadoop.examples.dancing This package is a distributed implementation of Knuth's dancing links algorithm that can run under Hadoop. 
org.apache.hadoop.io Generic i/o code for use when reading and writing data to the network, to databases, and to files. 
org.apache.hadoop.mapred A software framework for easily writing applications which process vast amounts of data (multi-terabyte data-sets) parallelly on large clusters (thousands of nodes) built of commodity hardware in a reliable, fault-tolerant manner. 
org.apache.hadoop.mapred.join Given a set of sorted datasets keyed with the same class and yielding equal partitions, it is possible to effect a join of those datasets prior to the map. 
org.apache.hadoop.mapred.lib Library of generally useful mappers, reducers, and partitioners. 
org.apache.hadoop.mapred.lib.aggregate Classes for performing various counting and aggregations. 
org.apache.hadoop.mapreduce   
org.apache.hadoop.mapreduce.lib.output   
org.apache.hadoop.mapreduce.lib.partition   
org.apache.hadoop.record Hadoop record I/O contains classes and a record description language translator for simplifying serialization and deserialization of records in a language-neutral manner. 
org.apache.hadoop.record.meta   
org.apache.hadoop.typedbytes Typed bytes are sequences of bytes in which the first byte is a type code. 
org.apache.hadoop.util.bloom   
 

Uses of WritableComparable in org.apache.hadoop.contrib.index.mapred
 

Classes in org.apache.hadoop.contrib.index.mapred with type parameters of type WritableComparable
 interface ILocalAnalysis<K extends WritableComparable,V extends Writable>
          Application specific local analysis.
 class IndexUpdateMapper<K extends WritableComparable,V extends Writable>
          This class applies local analysis on a key-value pair and then convert the result docid-operation pair to a shard-and-intermediate form pair.
 

Classes in org.apache.hadoop.contrib.index.mapred that implement WritableComparable
 class DocumentID
          The class represents a document id, which is of type text.
 class Shard
          This class represents the metadata of a shard.
 

Methods in org.apache.hadoop.contrib.index.mapred that return types with arguments of type WritableComparable
static Class<? extends WritableComparable> IndexUpdateMapper.getMapOutputKeyClass()
          Get the map output key class.
static Class<? extends WritableComparable> IndexUpdateReducer.getOutputKeyClass()
          Get the reduce output key class.
 

Uses of WritableComparable in org.apache.hadoop.examples
 

Classes in org.apache.hadoop.examples that implement WritableComparable
static class MultiFileWordCount.WordOffset
          This record keeps <filename,offset> pairs.
static class SecondarySort.IntPair
          Define a pair of integers that are writable.
 

Method parameters in org.apache.hadoop.examples with type arguments of type WritableComparable
 void PiEstimator.PiReducer.reduce(BooleanWritable isInside, Iterator<LongWritable> values, OutputCollector<WritableComparable<?>,Writable> output, Reporter reporter)
          Accumulate number of points inside/outside results from the mappers.
 

Uses of WritableComparable in org.apache.hadoop.examples.dancing
 

Methods in org.apache.hadoop.examples.dancing with parameters of type WritableComparable
 void DistributedPentomino.PentMap.map(WritableComparable key, Text value, OutputCollector<Text,Text> output, Reporter reporter)
          Break the prefix string into moves (a sequence of integer row ids that will be selected for each column in order).
 

Uses of WritableComparable in org.apache.hadoop.io
 

Classes in org.apache.hadoop.io that implement WritableComparable
 class BooleanWritable
          A WritableComparable for booleans.
 class BytesWritable
          A byte sequence that is usable as a key or value.
 class ByteWritable
          A WritableComparable for a single byte.
 class DoubleWritable
          Writable for Double values.
 class FloatWritable
          A WritableComparable for floats.
 class IntWritable
          A WritableComparable for ints.
 class LongWritable
          A WritableComparable for longs.
 class MD5Hash
          A Writable for MD5 hash values.
 class NullWritable
          Singleton Writable with no data.
 class Text
          This class stores text using standard UTF8 encoding.
 class UTF8
          Deprecated. replaced by Text
 class VIntWritable
          A WritableComparable for integer values stored in variable-length format.
 class VLongWritable
          A WritableComparable for longs in a variable-length format.
 

Methods in org.apache.hadoop.io that return WritableComparable
 WritableComparable SortedMapWritable.firstKey()
          
 WritableComparable SetFile.Reader.get(WritableComparable key)
          Read the matching key from a set into key.
 WritableComparable MapFile.Reader.getClosest(WritableComparable key, Writable val)
          Finds the record that is the closest match to the specified key.
 WritableComparable MapFile.Reader.getClosest(WritableComparable key, Writable val, boolean before)
          Finds the record that is the closest match to the specified key.
 WritableComparable SortedMapWritable.lastKey()
          
 WritableComparable MapFile.Reader.midKey()
          Get the key at approximately the middle of the file.
 WritableComparable WritableComparator.newKey()
          Construct a new WritableComparable instance.
 

Methods in org.apache.hadoop.io that return types with arguments of type WritableComparable
 Comparator<? super WritableComparable> SortedMapWritable.comparator()
          
 Set<Map.Entry<WritableComparable,Writable>> SortedMapWritable.entrySet()
          
 Class<? extends WritableComparable> WritableComparator.getKeyClass()
          Returns the WritableComparable implementation class.
 SortedMap<WritableComparable,Writable> SortedMapWritable.headMap(WritableComparable toKey)
          
 Set<WritableComparable> SortedMapWritable.keySet()
          
 SortedMap<WritableComparable,Writable> SortedMapWritable.subMap(WritableComparable fromKey, WritableComparable toKey)
          
 SortedMap<WritableComparable,Writable> SortedMapWritable.tailMap(WritableComparable fromKey)
          
 

Methods in org.apache.hadoop.io with parameters of type WritableComparable
 void SetFile.Writer.append(WritableComparable key)
          Append a key to a set.
 void MapFile.Writer.append(WritableComparable key, Writable val)
          Append a key/value pair to the map.
 void BloomMapFile.Writer.append(WritableComparable key, Writable val)
           
 int WritableComparator.compare(WritableComparable a, WritableComparable b)
          Compare two WritableComparables.
 int WritableComparator.compare(WritableComparable a, WritableComparable b)
          Compare two WritableComparables.
 int LongWritable.DecreasingComparator.compare(WritableComparable a, WritableComparable b)
           
 int LongWritable.DecreasingComparator.compare(WritableComparable a, WritableComparable b)
           
 void MapFile.Reader.finalKey(WritableComparable key)
          Reads the final key from the file.
 WritableComparable SetFile.Reader.get(WritableComparable key)
          Read the matching key from a set into key.
 Writable MapFile.Reader.get(WritableComparable key, Writable val)
          Return the value for the named key, or null if none exists.
 Writable BloomMapFile.Reader.get(WritableComparable key, Writable val)
          Fast version of the MapFile.Reader.get(WritableComparable, Writable) method.
 WritableComparable MapFile.Reader.getClosest(WritableComparable key, Writable val)
          Finds the record that is the closest match to the specified key.
 WritableComparable MapFile.Reader.getClosest(WritableComparable key, Writable val, boolean before)
          Finds the record that is the closest match to the specified key.
 SortedMap<WritableComparable,Writable> SortedMapWritable.headMap(WritableComparable toKey)
          
 boolean SetFile.Reader.next(WritableComparable key)
          Read the next key in a set into key.
 boolean MapFile.Reader.next(WritableComparable key, Writable val)
          Read the next key/value pair in the map into key and val.
 boolean BloomMapFile.Reader.probablyHasKey(WritableComparable key)
          Checks if this MapFile has the indicated key.
 Writable SortedMapWritable.put(WritableComparable key, Writable value)
          
 boolean MapFile.Reader.seek(WritableComparable key)
          Positions the reader at the named key, or if none such exists, at the first entry after the named key.
 boolean SetFile.Reader.seek(WritableComparable key)
           
 SortedMap<WritableComparable,Writable> SortedMapWritable.subMap(WritableComparable fromKey, WritableComparable toKey)
          
 SortedMap<WritableComparable,Writable> SortedMapWritable.subMap(WritableComparable fromKey, WritableComparable toKey)
          
 SortedMap<WritableComparable,Writable> SortedMapWritable.tailMap(WritableComparable fromKey)
          
 

Method parameters in org.apache.hadoop.io with type arguments of type WritableComparable
static WritableComparator WritableComparator.get(Class<? extends WritableComparable> c)
          Get a comparator for a WritableComparable implementation.
 void SortedMapWritable.putAll(Map<? extends WritableComparable,? extends Writable> t)
          
 

Constructor parameters in org.apache.hadoop.io with type arguments of type WritableComparable
BloomMapFile.Writer(Configuration conf, FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass, Class valClass)
           
BloomMapFile.Writer(Configuration conf, FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass, Class<? extends Writable> valClass, SequenceFile.CompressionType compress, CompressionCodec codec, Progressable progress)
           
BloomMapFile.Writer(Configuration conf, FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass, Class valClass, SequenceFile.CompressionType compress)
           
BloomMapFile.Writer(Configuration conf, FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass, Class valClass, SequenceFile.CompressionType compress, Progressable progress)
           
MapFile.Writer(Configuration conf, FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass, Class valClass)
          Create the named map for keys of the named class.
MapFile.Writer(Configuration conf, FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass, Class valClass, SequenceFile.CompressionType compress)
          Create the named map for keys of the named class.
MapFile.Writer(Configuration conf, FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass, Class valClass, SequenceFile.CompressionType compress, CompressionCodec codec, Progressable progress)
          Create the named map for keys of the named class.
MapFile.Writer(Configuration conf, FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass, Class valClass, SequenceFile.CompressionType compress, Progressable progress)
          Create the named map for keys of the named class.
SequenceFile.Sorter(FileSystem fs, Class<? extends WritableComparable> keyClass, Class valClass, Configuration conf)
          Sort and merge files containing the named classes.
SetFile.Writer(Configuration conf, FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass, SequenceFile.CompressionType compress)
          Create a set naming the element class and compression type.
SetFile.Writer(FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass)
          Deprecated. pass a Configuration too
WritableComparator(Class<? extends WritableComparable> keyClass)
          Construct for a WritableComparable implementation.
WritableComparator(Class<? extends WritableComparable> keyClass, boolean createInstances)
           
 

Uses of WritableComparable in org.apache.hadoop.mapred
 

Methods in org.apache.hadoop.mapred with type parameters of type WritableComparable
static
<K extends WritableComparable,V extends Writable>
Writable
MapFileOutputFormat.getEntry(MapFile.Reader[] readers, Partitioner<K,V> partitioner, K key, V value)
          Get an entry from output generated by this class.
 

Methods in org.apache.hadoop.mapred that return types with arguments of type WritableComparable
 RecordWriter<WritableComparable,Writable> MapFileOutputFormat.getRecordWriter(FileSystem ignored, JobConf job, String name, Progressable progress)
           
static Class<? extends WritableComparable> SequenceFileAsBinaryOutputFormat.getSequenceFileOutputKeyClass(JobConf conf)
          Get the key class for the SequenceFile
 

Uses of WritableComparable in org.apache.hadoop.mapred.join
 

Classes in org.apache.hadoop.mapred.join with type parameters of type WritableComparable
 interface ComposableInputFormat<K extends WritableComparable,V extends Writable>
          Refinement of InputFormat requiring implementors to provide ComposableRecordReader instead of RecordReader.
 interface ComposableRecordReader<K extends WritableComparable,V extends Writable>
          Additional operations required of a RecordReader to participate in a join.
 class CompositeInputFormat<K extends WritableComparable>
          An InputFormat capable of performing joins over a set of data sources sorted and partitioned the same way.
 class CompositeRecordReader<K extends WritableComparable,V extends Writable,X extends Writable>
          A RecordReader that can effect joins of RecordReaders sharing a common key type and partitioning.
 class InnerJoinRecordReader<K extends WritableComparable>
          Full inner join.
 class JoinRecordReader<K extends WritableComparable>
          Base class for Composite joins returning Tuples of arbitrary Writables.
 class MultiFilterRecordReader<K extends WritableComparable,V extends Writable>
          Base class for Composite join returning values derived from multiple sources, but generally not tuples.
 class OuterJoinRecordReader<K extends WritableComparable>
          Full outer join.
 class OverrideRecordReader<K extends WritableComparable,V extends Writable>
          Prefer the "rightmost" data source for this key.
 class WrappedRecordReader<K extends WritableComparable,U extends Writable>
          Proxy class for a RecordReader participating in the join framework.
 

Uses of WritableComparable in org.apache.hadoop.mapred.lib
 

Classes in org.apache.hadoop.mapred.lib with type parameters of type WritableComparable
 class TotalOrderPartitioner<K extends WritableComparable,V>
          Partitioner effecting a total order by reading split points from an externally generated source.
 

Methods in org.apache.hadoop.mapred.lib that return types with arguments of type WritableComparable
static Class<? extends WritableComparable> MultipleOutputs.getNamedOutputKeyClass(JobConf conf, String namedOutput)
          Returns the key class for a named output.
 

Uses of WritableComparable in org.apache.hadoop.mapred.lib.aggregate
 

Classes in org.apache.hadoop.mapred.lib.aggregate with type parameters of type WritableComparable
 class ValueAggregatorCombiner<K1 extends WritableComparable,V1 extends Writable>
          This class implements the generic combiner of Aggregate.
 class ValueAggregatorJobBase<K1 extends WritableComparable,V1 extends Writable>
          This abstract class implements some common functionalities of the the generic mapper, reducer and combiner classes of Aggregate.
 class ValueAggregatorMapper<K1 extends WritableComparable,V1 extends Writable>
          This class implements the generic mapper of Aggregate.
 class ValueAggregatorReducer<K1 extends WritableComparable,V1 extends Writable>
          This class implements the generic reducer of Aggregate.
 

Uses of WritableComparable in org.apache.hadoop.mapreduce
 

Classes in org.apache.hadoop.mapreduce that implement WritableComparable
 class ID
          A general identifier, which internally stores the id as an integer.
 class JobID
          JobID represents the immutable and unique identifier for the job.
 class TaskAttemptID
          TaskAttemptID represents the immutable and unique identifier for a task attempt.
 class TaskID
          TaskID represents the immutable and unique identifier for a Map or Reduce Task.
 

Uses of WritableComparable in org.apache.hadoop.mapreduce.lib.output
 

Methods in org.apache.hadoop.mapreduce.lib.output that return types with arguments of type WritableComparable
static Class<? extends WritableComparable> SequenceFileAsBinaryOutputFormat.getSequenceFileOutputKeyClass(JobContext job)
          Get the key class for the SequenceFile
 

Uses of WritableComparable in org.apache.hadoop.mapreduce.lib.partition
 

Classes in org.apache.hadoop.mapreduce.lib.partition with type parameters of type WritableComparable
 class TotalOrderPartitioner<K extends WritableComparable<?>,V>
          Partitioner effecting a total order by reading split points from an externally generated source.
 

Uses of WritableComparable in org.apache.hadoop.record
 

Classes in org.apache.hadoop.record that implement WritableComparable
 class Record
          Abstract class that is extended by generated classes.
 

Constructor parameters in org.apache.hadoop.record with type arguments of type WritableComparable
RecordComparator(Class<? extends WritableComparable> recordClass)
          Construct a raw Record comparison implementation.
 

Uses of WritableComparable in org.apache.hadoop.record.meta
 

Classes in org.apache.hadoop.record.meta that implement WritableComparable
 class RecordTypeInfo
          A record's Type Information object which can read/write itself.
 

Uses of WritableComparable in org.apache.hadoop.typedbytes
 

Classes in org.apache.hadoop.typedbytes that implement WritableComparable
 class TypedBytesWritable
          Writable for typed bytes.
 

Uses of WritableComparable in org.apache.hadoop.util.bloom
 

Classes in org.apache.hadoop.util.bloom that implement WritableComparable
 class Key
          The general behavior of a key that must be stored in a filter.
 



Copyright © 2009 The Apache Software Foundation