Uses of Interface org.apache.hadoop.mapred.join.ResetableIterator (Hadoop 0.20.2-cdh3u1 API)
Date: 2011-07-18

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## Uses of Interface
org.apache.hadoop.mapred.join.ResetableIterator

Packages that use ResetableIterator
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.

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

Classes in org.apache.hadoop.mapred.join that implement ResetableIterator
`class` | `ArrayListBackedIterator<X extends Writable>` This class provides an implementation of ResetableIterator.
`protected class` | `JoinRecordReader.JoinDelegationIterator` Since the JoinCollector is effecting our operation, we need only provide an iterator proxy wrapping its operation.
`protected class` | `MultiFilterRecordReader.MultiFilterDelegationIterator` Proxy the JoinCollector, but include callback to emit.
`static class` | `ResetableIterator.EMPTY<U extends Writable>`
`class` | `StreamBackedIterator<X extends Writable>` This class provides an implementation of ResetableIterator.

Methods in org.apache.hadoop.mapred.join that return ResetableIterator
`protected abstract ResetableIterator<X>` | `CompositeRecordReader.getDelegate()` Obtain an iterator over the child RRs apropos of the value type ultimately emitted from this join.
`protected ResetableIterator<TupleWritable>` | `JoinRecordReader.getDelegate()` Return an iterator wrapping the JoinCollector.
`protected ResetableIterator<V>` | `MultiFilterRecordReader.getDelegate()` Return an iterator returning a single value from the tuple.

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