joshua.corpus.AbstractPhrase Class Reference

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List of all members.

Public Member Functions
int	hashCode ()
boolean	equals (Object o)
int	compareTo (Phrase other)
String	toString ()
Static Public Attributes
static final int	HASH_SEED = 17
static final int	HASH_OFFSET = 37
Protected Member Functions
int[]	splitSentence (String sentence)

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Detailed Description

This class provides a skeletal implementation of the base methods likely to be common to most or all implementations of the Phrase interface.

Author:

Lane Schwartz

Chris Callison-Burch

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Member Function Documentation

int joshua.corpus.AbstractPhrase.compareTo

(

Phrase

other

)

Compares the two strings based on the lexicographic order of words defined in the Vocabulary.

Parameters:

other

the object to compare to

Returns:

-1 if this object is less than the parameter, 0 if equals, 1 if greater

Exceptions:

ClassCastException

if the passed object is not of type Phrase

Implements joshua.corpus.Phrase.

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boolean joshua.corpus.AbstractPhrase.equals

(

Object

o

)

Two phrases are their word IDs are the same. Note that this could give a false positive if their Vocabularies were different but their IDs were somehow the same.

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int joshua.corpus.AbstractPhrase.hashCode

(

)

Uses the standard java approach of calculating hashCode. Start with a seed, add in every value multiplying the exsiting hash times an offset.

Returns:

int hashCode for the list

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int [] joshua.corpus.AbstractPhrase.splitSentence

(

String

sentence

)

[protected]

Splits a sentence (on white space), then looks up the integer representations of each word using the supplied symbol table.

Parameters:

sentence

White-space separated String of words.

Returns:

Array of integers corresponding to the words in the sentence.

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String joshua.corpus.AbstractPhrase.toString

(

)

Returns a string representation of the phrase.

Returns:

a space-delimited string of the words in the phrase.

Implements joshua.corpus.Phrase.

Reimplemented in joshua.corpus.BasicPhrase.

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Member Data Documentation

final int joshua.corpus.AbstractPhrase.HASH_OFFSET = 37 [static]

offset used in has code generation

final int joshua.corpus.AbstractPhrase.HASH_SEED = 17 [static]

seed used in hash code generation