opennlp.maxent.io
Class OldFormatGISModelReader

java.lang.Object
  opennlp.maxent.io.GISModelReader
      opennlp.maxent.io.PlainTextGISModelReader
          opennlp.maxent.io.OldFormatGISModelReader

public class OldFormatGISModelReader
extends PlainTextGISModelReader

A reader for GIS models stored in the format used in v1.0 of Maxent. It extends the PlainTextGISModelReader to read in the info and then overrides the getParameters method so that it can appropriately read the binary file which stores the parameters.

Version:

$Revision: 1.4 $, $Date: 2005/10/06 11:04:16 $

Author:

Jason Baldridge

Field Summary

Fields inherited from class opennlp.maxent.io.GISModelReader

NUM_PREDS

Constructor Summary

OldFormatGISModelReader(java.lang.String modelname)
Constructor which takes the name of the model without any suffixes, such as ".mei.gz" or ".mep.gz".

Method Summary

protected Context[]	getParameters(int[][] outcomePatterns) Reads the parameters from a file and populates an array of context objects.
static void	main(java.lang.String[] args) Convert a model created with Maxent 1.0 to a format used with Maxent 1.2.

Methods inherited from class opennlp.maxent.io.PlainTextGISModelReader

readDouble, readInt, readUTF

Methods inherited from class opennlp.maxent.io.GISModelReader

checkModelType, getCorrectionConstant, getCorrectionParameter, getModel, getOutcomePatterns, getOutcomes, getPredicates

Methods inherited from class java.lang.Object

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

Constructor Detail

OldFormatGISModelReader

public OldFormatGISModelReader(java.lang.String modelname)
                        throws java.io.IOException

Constructor which takes the name of the model without any suffixes, such as ".mei.gz" or ".mep.gz".

Throws:

java.io.IOException

Method Detail

getParameters

protected Context[] getParameters(int[][] outcomePatterns)
                           throws java.io.IOException

Reads the parameters from a file and populates an array of context objects.

Overrides:

getParameters in class GISModelReader

Parameters:

outcomePatterns - The outcomes patterns for the model. The first index refers to which outcome pattern (a set of outcomes that occurs with a context) is being specified. The second index specifies the number of contexts which use this pattern at index 0, and the index of each outcomes which make up this pattern in indicies 1-n.

Returns:

An array of context objects.

Throws:

java.io.IOException - when the model file does not match the outcome patterns or can not be read.

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Convert a model created with Maxent 1.0 to a format used with Maxent 1.2.

Usage: java opennlp.maxent.io.OldFormatGISModelReader model_name_prefix (new_model_name)");

If the new_model_name is left unspecified, the new model will be saved in gzipped, binary format as ".bin.gz".

Throws:

java.io.IOException