joshua.util.ExtractTopCand Class Reference

List of all members.

Static Public Member Functions
static void	main (String[] args)
Static Protected Member Functions
static void	extractOneBest (IndexedReader< String > nbestReader, BufferedWriter onebestWriter) throws IOException

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Detailed Description

This program extracts the 1-best output translations from the n-best output translations generated by joshua.decoder.JoshuaDecoder.

Author:

wren ng thornton wren@.nosp@m.user.nosp@m.s.sou.nosp@m.rcef.nosp@m.orge..nosp@m.net

Version:

LastChangedDate:

2009-03-26 15:06:57 -0400 (Thu, 26 Mar 2009)

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Member Function Documentation

static void joshua.util.ExtractTopCand.extractOneBest	(	IndexedReader< String >	nbestReader,
		BufferedWriter	onebestWriter
	)		throws IOException [static, protected]

Prints the one-best translation for each segment ID from the reader as a line on the writer, and closes both before exiting. The translations for a segment are printed in the order of the first occurance of the segment ID. Any information about the segment other than the translation (including segment ID) is not printed to the writer.

Developer Notes

This implementation assumes:

1. all translations for a segment are contiguous
2. the 1-best translation is the first one encountered.

We will need to alter the implementation if these assumptions no longer hold for the output of JoshuaDecoder (or any sensible n-best format passed to this method).

We should switch to using an n-best joshua.decoder.segment_file.SegmentFileParser to ensure future compatibility with being able to configure the output format of the decoder. The MERT code needs such a SegmentFileParser anyways, so that will reduce the code duplication between these two classes.

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static void joshua.util.ExtractTopCand.main

(

String[]

args

)

[static]

Usage: java ExtractTopCand nbestInputFile 1bestOutputFile.

If the input file name is "-" then input is read from System.in. If the output file name is "-" then output is directed to System.out. If a file already exists with the output file name, it is truncated before writing. The bulk of this program is implemented by extractOneBest(IndexedReader,BufferedWriter).

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