joshua.corpus.ContiguousPhrase Class Reference

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List of all members.

Public Member Functions
	ContiguousPhrase (int startIndex, int endIndex, Corpus corpusArray)
int[]	getWordIDs ()
int	getWordID (int position)
int	size ()
List< Phrase >	getSubPhrases ()
List< Phrase >	getSubPhrases (int maxLength)
Phrase	subPhrase (int start, int end)
Static Public Member Functions
static void	main (String[] args)
Protected Attributes
int	startIndex
int	endIndex
Corpus	corpusArray

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Detailed Description

ContiguousPhrase implements the Phrase interface by linking into indices within a corpus. This is intended to be a very low-memory implementation of the class.

Author:

Chris Callison-Burch

Since:

29 May 2008

Version:

LastChangedDate:

008-09-18 12:47:23 -0500 (Thu, 18 Sep 2008)

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Constructor & Destructor Documentation

joshua.corpus.ContiguousPhrase.ContiguousPhrase	(	int	startIndex,
		int	endIndex,
		Corpus	corpusArray
	)

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Member Function Documentation

List<Phrase> joshua.corpus.ContiguousPhrase.getSubPhrases

(

)

Gets all possible subphrases of this phrase, up to and including the phrase itself. For example, the phrase "I like cheese ." would return the following:

• I
• like
• cheese
• .
• I like
• like cheese
• cheese .
• I like cheese
• like cheese .
• I like cheese .

Returns:

ArrayList of all possible subphrases.

Implements joshua.corpus.Phrase.

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List<Phrase> joshua.corpus.ContiguousPhrase.getSubPhrases

(

int

maxLength

)

Returns a list of subphrases only of length maxLength or smaller.

Parameters:

maxLength

the maximum length phrase to return.

Returns:

ArrayList of all possible subphrases of length maxLength or less

See also:

getSubPhrases()

Implements joshua.corpus.Phrase.

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int joshua.corpus.ContiguousPhrase.getWordID

(

int

position

)

Returns the integer word id of the word at the specified position.

Parameters:

position

Index of a word in this phrase.

Returns:

the integer word id of the word at the specified position.

Implements joshua.corpus.Phrase.

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int [] joshua.corpus.ContiguousPhrase.getWordIDs

(

)

This method copies the phrase into an array of ints. This method should be avoided if possible.

Returns:

an int[] corresponding to the ID of each word in the phrase

Implements joshua.corpus.Phrase.

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static void joshua.corpus.ContiguousPhrase.main

(

String[]

args

)

[static]

Main contains test code

int joshua.corpus.ContiguousPhrase.size

(

)

Returns the number of words in this phrase.

Returns:

the number of words in this phrase.

Implements joshua.corpus.Phrase.

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Phrase joshua.corpus.ContiguousPhrase.subPhrase	(	int	start,
		int	end
	)

creates a new phrase object from the indexes provided.

NOTE: subList merely creates a "view" of the existing Phrase object. Memory taken up by other Words in the Phrase is not freed since the underlying subList object still points to the complete Phrase List.

See also:

ArrayList::subList(int, int)

Implements joshua.corpus.Phrase.

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Member Data Documentation

Corpus joshua.corpus.ContiguousPhrase.corpusArray [protected]

int joshua.corpus.ContiguousPhrase.endIndex [protected]

int joshua.corpus.ContiguousPhrase.startIndex [protected]