opennlp.tools.ngram

Class NGramCharModel

java.lang.Object

opennlp.tools.ngram.NGramCharModel

All Implemented Interfaces:

Iterable<String>

public class NGramCharModel
extends Object
implements Iterable<String>

The NGramCharModel can be used to create character ngrams.

See Also:

NGramModel}

Constructor Summary

Constructors

Constructor and Description
NGramCharModel() Initializes an empty instance.

Method Summary

Modifier and Type	Method and Description
void	add(CharSequence chars, int minLength, int maxLength) Adds CharSequence that will be ngrammed into chars.
void	add(String ngram) Adds one NGram, if it already exists the count increase by one.
boolean	contains(String ngram) Checks fit he given tokens are contained by the current instance.
void	cutoff(int cutoffUnder, int cutoffOver) Deletes all ngram which do appear less than the cutoffUnder value and more often than the cutoffOver value.
boolean	equals(Object obj)
int	getCount(String ngram) Retrieves the count of the given ngram.
int	hashCode()
Iterator<String>	iterator() Retrieves an Iterator over all String entries.
int	numberOfGrams() Retrieves the total count of all Ngrams.
void	remove(String ngram) Removes the specified tokens form the NGram model, they are just dropped.
void	setCount(String ngram, int count) Sets the count of an existing ngram.
int	size() Retrieves the number of String entries in the current instance.
String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

NGramCharModel

public NGramCharModel()

Initializes an empty instance.

Method Detail

getCount

public int getCount(String ngram)

Retrieves the count of the given ngram.

Parameters:

ngram - an ngram

Returns:

count of the ngram or 0 if it is not contained

setCount

public void setCount(String ngram,
                     int count)

Sets the count of an existing ngram.

Parameters:

ngram -

count -

add

public void add(String ngram)

Adds one NGram, if it already exists the count increase by one.

Parameters:

ngram -

add

public void add(CharSequence chars,
                int minLength,
                int maxLength)

Adds CharSequence that will be ngrammed into chars.

Parameters:

chars -

minLength -

maxLength -

remove

public void remove(String ngram)

Removes the specified tokens form the NGram model, they are just dropped.

Parameters:

ngram -

contains

public boolean contains(String ngram)

Checks fit he given tokens are contained by the current instance.

Parameters:

ngram -

Returns:

true if the ngram is contained

size

public int size()

Retrieves the number of String entries in the current instance.

Returns:

number of different grams

iterator

public Iterator<String> iterator()

Retrieves an Iterator over all String entries.

Specified by:

iterator in interface Iterable<String>

Returns:

iterator over all grams

numberOfGrams

public int numberOfGrams()

Retrieves the total count of all Ngrams.

Returns:

total count of all ngrams

cutoff

public void cutoff(int cutoffUnder,
                   int cutoffOver)

Deletes all ngram which do appear less than the cutoffUnder value and more often than the cutoffOver value.

Parameters:

cutoffUnder -

cutoffOver -

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object