Uses of Interface org.apache.hadoop.mapred.InputFormat (Hadoop 1.2.1 API)
Date: 2013-07-22

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## Uses of Interface
org.apache.hadoop.mapred.InputFormat

Packages that use InputFormat
org.apache.hadoop.contrib.index.example |
org.apache.hadoop.contrib.index.mapred |
org.apache.hadoop.examples | Hadoop example code.
org.apache.hadoop.examples.terasort | This package consists of 3 map/reduce applications for Hadoop to compete in the annual terabyte sort competition.
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.db | org.apache.hadoop.mapred.lib.db Package
org.apache.hadoop.streaming | `Hadoop Streaming` is a utility which allows users to create and run Map-Reduce jobs with any executables (e.g.

Uses of InputFormat in org.apache.hadoop.contrib.index.example

Classes in org.apache.hadoop.contrib.index.example that implement InputFormat
`class` | `LineDocInputFormat` An InputFormat for LineDoc for plain text files where each line is a doc.

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

Methods in org.apache.hadoop.contrib.index.mapred that return types with arguments of type InputFormat
`Class<? extends InputFormat>` | `IndexUpdateConfiguration.getIndexInputFormatClass()` Get the index input format class.

Method parameters in org.apache.hadoop.contrib.index.mapred with type arguments of type InputFormat
`void` | `IndexUpdateConfiguration.setIndexInputFormatClass(Class<? extends InputFormat> theClass)` Set the index input format class.

Uses of InputFormat in org.apache.hadoop.examples

Classes in org.apache.hadoop.examples that implement InputFormat
`static class` | `MultiFileWordCount.MyInputFormat` To use `MultiFileInputFormat`, one should extend it, to return a (custom) `RecordReader`.
`static class` | `SleepJob.SleepInputFormat`

Uses of InputFormat in org.apache.hadoop.examples.terasort

Classes in org.apache.hadoop.examples.terasort that implement InputFormat
`class` | `TeraInputFormat` An input format that reads the first 10 characters of each line as the key and the rest of the line as the value.

Uses of InputFormat in org.apache.hadoop.mapred

Classes in org.apache.hadoop.mapred that implement InputFormat
`class` | `FileInputFormat<K,V>` A base class for file-based `InputFormat`.
`class` | `KeyValueTextInputFormat` An `InputFormat` for plain text files.
`class` | `MultiFileInputFormat<K,V>` Deprecated. Use `CombineFileInputFormat` instead
`class` | `SequenceFileAsBinaryInputFormat` InputFormat reading keys, values from SequenceFiles in binary (raw) format.
`class` | `SequenceFileAsTextInputFormat` This class is similar to SequenceFileInputFormat, except it generates SequenceFileAsTextRecordReader which converts the input keys and values to their String forms by calling toString() method.
`class` | `SequenceFileInputFilter<K,V>` A class that allows a map/red job to work on a sample of sequence files.
`class` | `SequenceFileInputFormat<K,V>` An `InputFormat` for `SequenceFile`s.
`class` | `TextInputFormat` An `InputFormat` for plain text files.

Methods in org.apache.hadoop.mapred that return InputFormat
`InputFormat` | `JobConf.getInputFormat()` Get the `InputFormat` implementation for the map-reduce job, defaults to `TextInputFormat` if not specified explicity.

Method parameters in org.apache.hadoop.mapred with type arguments of type InputFormat
`void` | `JobConf.setInputFormat(Class<? extends InputFormat> theClass)` Set the `InputFormat` implementation for the map-reduce job.

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

Subinterfaces of InputFormat in org.apache.hadoop.mapred.join
`interface` | `ComposableInputFormat<K extends WritableComparable,V extends Writable>` Refinement of InputFormat requiring implementors to provide ComposableRecordReader instead of RecordReader.

Classes in org.apache.hadoop.mapred.join that implement InputFormat
`class` | `CompositeInputFormat<K extends WritableComparable>` An InputFormat capable of performing joins over a set of data sources sorted and partitioned the same way.
`static class` | `Parser.Node`

Method parameters in org.apache.hadoop.mapred.join with type arguments of type InputFormat
`static String` | `CompositeInputFormat.compose(Class<? extends InputFormat> inf, String path)` Convenience method for constructing composite formats.
`static String` | `CompositeInputFormat.compose(String op, Class<? extends InputFormat> inf, Path... path)` Convenience method for constructing composite formats.
`static String` | `CompositeInputFormat.compose(String op, Class<? extends InputFormat> inf, String... path)` Convenience method for constructing composite formats.

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

Classes in org.apache.hadoop.mapred.lib that implement InputFormat
`class` | `CombineFileInputFormat<K,V>` An abstract `InputFormat` that returns `CombineFileSplit`'s in `getSplits(JobConf, int)` method.
`class` | `DelegatingInputFormat<K,V>` An `InputFormat` that delegates behaviour of paths to multiple other InputFormats.
`class` | `NLineInputFormat` NLineInputFormat which splits N lines of input as one split.

Methods in org.apache.hadoop.mapred.lib with parameters of type InputFormat
`K[]` | `InputSampler.Sampler.getSample(InputFormat<K,V> inf, JobConf job)` For a given job, collect and return a subset of the keys from the input data.
`K[]` | `InputSampler.SplitSampler.getSample(InputFormat<K,V> inf, JobConf job)` From each split sampled, take the first numSamples / numSplits records.
`K[]` | `InputSampler.RandomSampler.getSample(InputFormat<K,V> inf, JobConf job)` Randomize the split order, then take the specified number of keys from each split sampled, where each key is selected with the specified probability and possibly replaced by a subsequently selected key when the quota of keys from that split is satisfied.
`K[]` | `InputSampler.IntervalSampler.getSample(InputFormat<K,V> inf, JobConf job)` For each split sampled, emit when the ratio of the number of records retained to the total record count is less than the specified frequency.

Method parameters in org.apache.hadoop.mapred.lib with type arguments of type InputFormat
`static void` | `MultipleInputs.addInputPath(JobConf conf, Path path, Class<? extends InputFormat> inputFormatClass)` Add a `Path` with a custom `InputFormat` to the list of inputs for the map-reduce job.
`static void` | `MultipleInputs.addInputPath(JobConf conf, Path path, Class<? extends InputFormat> inputFormatClass, Class<? extends Mapper> mapperClass)` Add a `Path` with a custom `InputFormat` and `Mapper` to the list of inputs for the map-reduce job.

Uses of InputFormat in org.apache.hadoop.mapred.lib.db

Classes in org.apache.hadoop.mapred.lib.db that implement InputFormat
`class` | `DBInputFormat<T extends DBWritable>` A InputFormat that reads input data from an SQL table.

Uses of InputFormat in org.apache.hadoop.streaming

Classes in org.apache.hadoop.streaming that implement InputFormat
`class` | `AutoInputFormat` An `InputFormat` that tries to deduce the types of the input files automatically.
`class` | `StreamInputFormat` An input format that selects a RecordReader based on a JobConf property.

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