com.fasterxml.sort
Class Merger.PairwiseMerger<T>

java.lang.Object
  com.fasterxml.sort.DataReader<T>
      com.fasterxml.sort.Merger<T>
          com.fasterxml.sort.Merger.PairwiseMerger<T>

Enclosing class:

Merger<T>

protected static class Merger.PairwiseMerger<T>
extends Merger<T>

Nested Class Summary

Nested classes/interfaces inherited from class com.fasterxml.sort.Merger

Merger.PairwiseMerger<T>

Field Summary

protected T	_data1
protected T	_data2
protected DataReader<T>	_reader1
protected DataReader<T>	_reader2

Fields inherited from class com.fasterxml.sort.Merger

_comparator

Constructor Summary

Merger.PairwiseMerger(Comparator<T> comparator, DataReader<T> reader1, DataReader<T> reader2)

Method Summary

void	close() Method for closing the reader.
int	estimateSizeInBytes(T item) Method that should estimate memory usage of given item, for purpose of limiting amount of data kept in memory during pre-sorting phase.
T	readNext() Method for reading the next data item; will return null to indicate end of input, otherwise return a non-null item.

Methods inherited from class com.fasterxml.sort.Merger

mergedReader

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_reader1

protected final DataReader<T> _reader1

_reader2

protected final DataReader<T> _reader2

_data1

protected T _data1

_data2

protected T _data2

Constructor Detail

Merger.PairwiseMerger

public Merger.PairwiseMerger(Comparator<T> comparator,
                             DataReader<T> reader1,
                             DataReader<T> reader2)
                      throws IOException

Throws:

IOException

Method Detail

readNext

public T readNext()
           throws IOException

Description copied from class: DataReader

Method for reading the next data item; will return null to indicate end of input, otherwise return a non-null item.

Specified by:

readNext in class DataReader<T>

Throws:

IOException

estimateSizeInBytes

public int estimateSizeInBytes(T item)

Description copied from class: DataReader

Method that should estimate memory usage of given item, for purpose of limiting amount of data kept in memory during pre-sorting phase.

Specified by:

estimateSizeInBytes in class DataReader<T>

close

public void close()
           throws IOException

Description copied from class: DataReader

Method for closing the reader. Note that reader needs to ensure that it is ok to call close multiple times. Reader may also close underlying resources as soon as it has reached end of input.

Specified by:

close in class DataReader<T>

Throws:

IOException