NGramFingerprintKeyer (OpenRefine 4.0-SNAPSHOT API)

java.lang.Object
- org.openrefine.clustering.binning.Keyer
- - org.openrefine.clustering.binning.FingerprintKeyer
  - - org.openrefine.clustering.binning.NGramFingerprintKeyer

```
public class NGramFingerprintKeyer
extends FingerprintKeyer
```
Fingerprint keyer which generates a fingerprint from a sorted list of unique character N-grams after removing all whitespace, control characters, and punctuation. N-grams are concatenated to form a single output key.

Field Summary
- Fields inherited from class org.openrefine.clustering.binning.FingerprintKeyer
  DIACRITICS_AND_FRIENDS

Constructor Summary

Constructors
Constructor Description

NGramFingerprintKeyer()

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`String`	`key(String s, Object... o)`
`protected TreeSet<String>`	`ngram_split(String s, int size)`	Deprecated. 2020-10-17 by tfmorris.
`protected Stream<String>`	`sorted_ngrams(String s, int size)`	Generate a stream of sorted unique character N-grams from a string

Methods inherited from class org.openrefine.clustering.binning.FingerprintKeyer
asciify, normalize, normalize, stripDiacritics

Methods inherited from class org.openrefine.clustering.binning.Keyer
key

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NGramFingerprintKeyer
```
public NGramFingerprintKeyer()
```
- Method Detail
  - key
```
public String key(String s,
                  Object... o)
```
    Overrides:
    
    key in class FingerprintKeyer
  - sorted_ngrams
```
protected Stream<String> sorted_ngrams(String s,
                                       int size)
```
    Generate a stream of sorted unique character N-grams from a string
    
    Parameters:
    
    s - String to generate N-grams from
    
    size - number of characters per N-gram
    
    Returns:
    
    a stream of sorted unique N-gram Strings
  - ngram_split
```
@Deprecated
protected TreeSet<String> ngram_split(String s,
                                      int size)
```
    Deprecated.
    2020-10-17 by tfmorris. Use sorted_ngrams(String, int)