| Package | Description | 
|---|---|
| org.apache.hadoop.mapred.join | 
| Modifier and Type | Method and Description | 
|---|---|
| protected TupleWritable | CompositeRecordReader. createInternalValue()Create a value to be used internally for joins. | 
| TupleWritable | JoinRecordReader. createValue()Create an object of the appropriate type to be used as a value. | 
| Modifier and Type | Method and Description | 
|---|---|
| protected ResetableIterator<TupleWritable> | JoinRecordReader. getDelegate()Return an iterator wrapping the JoinCollector. | 
| ComposableRecordReader<K,TupleWritable> | CompositeInputFormat. getRecordReader(InputSplit split,
                              JobConf job,
                              Reporter reporter)Construct a CompositeRecordReader for the children of this InputFormat
 as defined in the init expression. | 
| Modifier and Type | Method and Description | 
|---|---|
| protected boolean | MultiFilterRecordReader. combine(Object[] srcs,
              TupleWritable dst)Default implementation offers  MultiFilterRecordReader.emit(org.apache.hadoop.mapred.join.TupleWritable)every Tuple from the
 collector (the outer join of child RRs). | 
| protected abstract boolean | CompositeRecordReader. combine(Object[] srcs,
              TupleWritable value) | 
| protected boolean | OuterJoinRecordReader. combine(Object[] srcs,
              TupleWritable dst)Emit everything from the collector. | 
| protected boolean | InnerJoinRecordReader. combine(Object[] srcs,
              TupleWritable dst)Return true iff the tuple is full (all data sources contain this key). | 
| protected V | OverrideRecordReader. emit(TupleWritable dst)Emit the value with the highest position in the tuple. | 
| protected abstract V | MultiFilterRecordReader. emit(TupleWritable dst)For each tuple emitted, return a value (typically one of the values
 in the tuple). | 
| boolean | JoinRecordReader. next(K key,
        TupleWritable value)Emit the next set of key, value pairs as defined by the child
 RecordReaders and operation associated with this composite RR. | 
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