joshua.decoder.ff.tm.BasicRuleCollection Class Reference

Inheritance diagram for joshua.decoder.ff.tm.BasicRuleCollection:

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List of all members.

Public Member Functions
	BasicRuleCollection (int arity, int[] sourceTokens)
	BasicRuleCollection (int arity, int[] sourceTokens, List< Rule > rules)
int	getArity ()
List< Rule >	getRules ()
synchronized void	sortRules (List< FeatureFunction > l_models)
List< Rule >	getSortedRules ()
int[]	getSourceSide ()
Static Public Member Functions
static void	sortRules (List< Rule > rules, List< FeatureFunction > l_models)
Protected Attributes
boolean	sorted
final List< Rule >	rules
int	arity
int[]	sourceTokens
Static Private Attributes
static final Logger	logger = Logger.getLogger(BasicRuleCollection.class.getName())

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Detailed Description

Basic collection of translation rules.

Author:

Lane Schwartz

Zhifei Li

Version:

$LastChangedDate$

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Constructor & Destructor Documentation

joshua.decoder.ff.tm.BasicRuleCollection.BasicRuleCollection	(	int	arity,
		int[]	sourceTokens
	)

Constructs an initially empty rule collection.

Parameters:

arity	Number of nonterminals in the source pattern
sourceTokens	Sequence of terminals and nonterminals in the source pattern

joshua.decoder.ff.tm.BasicRuleCollection.BasicRuleCollection	(	int	arity,
		int[]	sourceTokens,
		List< Rule >	rules
	)

Constructs a rule collection with the given data.

The list of rules must already be sorted

NOTE: if rules==null, the rule member variable will be initialized to an immutable empty list.

Parameters:

arity
sourceTokens
rules

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Member Function Documentation

int joshua.decoder.ff.tm.BasicRuleCollection.getArity

(

)

Gets the number of nonterminals in the source side of the rules in this RuleCollection. The source side is the same for all the rules in the RuleCollection, so the arity will also be the same for all of these rules.

Returns:

the (common) number of nonterminals in the source side of the rules in this RuleCollection

Implements joshua.decoder.ff.tm.RuleCollection.

List<Rule> joshua.decoder.ff.tm.BasicRuleCollection.getRules

(

)

get the list of rules (which may not be sorted or not)

Implements joshua.decoder.ff.tm.RuleCollection.

List<Rule> joshua.decoder.ff.tm.BasicRuleCollection.getSortedRules

(

)

TODO: now, we assume this function will be called only after all the rules have been read; this method need to be synchronized as we will call this function only after the decoding begins to avoid the synchronized method, we should call this once the grammar is finished

public synchronized ArrayList<Rule> get_sorted_rules(){ l_models: if it is non-null, then the rules will be sorted using the new feature functions (or new weight), otherwise, just return a sorted list based on the last time of feature functions

Only CubePruning requires that rules are sorted based on est_cost (confirmed by zhifei)

Implements joshua.decoder.ff.tm.RuleCollection.

int [] joshua.decoder.ff.tm.BasicRuleCollection.getSourceSide

(

)

Gets the source side for all rules in this RuleCollection. This source side is the same for all the rules in the RuleCollection.

Returns:

the (common) source side for all rules in this RuleCollection

Implements joshua.decoder.ff.tm.RuleCollection.

static void joshua.decoder.ff.tm.BasicRuleCollection.sortRules	(	List< Rule >	rules,
		List< FeatureFunction >	l_models
	)		[static]

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synchronized void joshua.decoder.ff.tm.BasicRuleCollection.sortRules

(

List< FeatureFunction >

l_models

)

Sorts the grammar rules in this collection using the provided feature functions.

Parameters:

l_models

Feature function models to use during sorting.

Implements joshua.decoder.ff.tm.RuleCollection.

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Member Data Documentation

int joshua.decoder.ff.tm.BasicRuleCollection.arity [protected]

Number of nonterminals in the source pattern.

final Logger joshua.decoder.ff.tm.BasicRuleCollection.logger = Logger.getLogger(BasicRuleCollection.class.getName()) [static, private]

Logger for this class.

Reimplemented in joshua.decoder.ff.tm.hash_based.MemoryBasedRuleBin.

final List<Rule> joshua.decoder.ff.tm.BasicRuleCollection.rules [protected]

List of rules stored in this collection.

boolean joshua.decoder.ff.tm.BasicRuleCollection.sorted [protected]

Indicates whether the rules in this collection have been sorted based on the latest feature function values.

int [] joshua.decoder.ff.tm.BasicRuleCollection.sourceTokens [protected]

Sequence of terminals and nonterminals in the source pattern.