io.spokestack.spokestack.nlu.tensorflow.parsers

Class DigitsParser

java.lang.Object

io.spokestack.spokestack.nlu.tensorflow.parsers.DigitsParser

All Implemented Interfaces:

SlotParser

public final class DigitsParser
extends Object
implements SlotParser

This parser converts a string representation of a sequence of digits into the corresponding sequence of digits. Strings may include english cardinal representations of numbers, as well as some simple homophones.

Only positive values are recognized.

These may include hyphenated or unhyphenated numbers from twenty through ninety-nine. Unhyphenated numbers are automatically joined.

Allowing unhyphenated double-digit numbers creates an ambiguity that limits some representations, for example "sixty five thousand" could be parsed as either 65000 or 605000. For this reason, 2- and 3-digit numbers are restricted to even hundreds/thousands. In this model, the above number would always be parsed as "65000" -- in other words, "sixty five thousand one" would be parsed as "650001". This limitation should be acceptable for most multi-digit requirements (telephone numbers, social security numbers, etc.)

Constructor Summary

Constructors

Constructor and Description
DigitsParser() Create a new digit parser.

Method Summary

Modifier and Type	Method and Description
Object	parse(Map<String,Object> metadata, String rawValue) Parse a raw string value from an utterance into a typed value for a concrete slot.

Methods inherited from class java.lang.Object

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

Constructor Detail

DigitsParser

public DigitsParser()

Create a new digit parser.

Method Detail

parse

public Object parse(Map<String,Object> metadata,
                    String rawValue)

Description copied from interface: SlotParser

Parse a raw string value from an utterance into a typed value for a concrete slot.

Implementers should throw an exception if the parsed value is invalid according to the supplied metadata.

Specified by:

parse in interface SlotParser

Parameters:

metadata - A map representing metadata for the particular slot being parsed.

rawValue - The string from a user utterance that represents a slot value.

Returns:

The slot represented by value.