From 8e5fad9bcbadf36bbab3c1c5b053e3c8f7dddbce Mon Sep 17 00:00:00 2001
From: Chris Dyer <prguest11@taipan.cs>
Date: Thu, 2 Feb 2012 06:29:50 +0000
Subject: lopez suffix array extractor with copyrighted david chiang code
 excised

---
 sa-extract/manager.py | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 sa-extract/manager.py

(limited to 'sa-extract/manager.py')

diff --git a/sa-extract/manager.py b/sa-extract/manager.py
new file mode 100644
index 00000000..767192c1
--- /dev/null
+++ b/sa-extract/manager.py
@@ -0,0 +1,100 @@
+import csuf
+import cdat
+
+class Sampler(object):
+	'''A Sampler implements a logic for choosing
+	samples from a population range'''
+
+	def __init__(self):
+		pass
+
+	def registerContext(self, context_manager):
+		self.context_manager = context_manager
+
+	def sample(self, phrase_location):
+		return cintlist.CIntList()
+
+
+
+class Extractor(object):
+	'''Extractor is responsible for extracting rules
+	from a given context; once a sentence id/location
+	is found for the source fwords, extractor is 
+	responsible for producing any matching rule(s).
+	Optionally, extractor may return an empty list'''
+
+	def __init__(self):
+		pass
+
+	def registerContext(self, context_manager):
+		self.context_manager = context_manager
+
+	def extract(self, fwords, loc):
+		return []
+	
+
+
+class RuleFactory(object):
+	'''RuleFactory is a class that manages the
+	generation of translation rules, using the Context
+	and (optionally) any of its contained classes or
+	data.  The RuleFactory is responsible for handling
+	any caching (i.e. when presented with an input
+	sentence, it may lookup a rule from its cache
+	rather than extracting a new rule)'''
+
+	def __init__(self):
+		self.num_lookups = 0
+		self.num_extractions = 0
+		self.num_rules = 0
+		self.time = 0.0
+
+
+	def registerContext(self, context_manager):
+		self.context_manager = context_manager
+
+
+	def input(self, fwords):
+		'''Manages the process of enumerating
+		rules for a given input sentence, and
+		looking them with calls to Context,
+		Sampler, and Extractor'''
+		return []
+
+
+class ContextManager(object):
+
+	def __init__(self, ffile, efile, extractor=None, sampler=None, rulefactory=None, from_binary=False):
+		# NOTE: Extractor does not have a default value because
+		# the only nontrivial extractor right now depends on an
+		# alignment file
+
+		self.fsarray = csuf.SuffixArray(ffile, from_binary)
+		self.edarray = cdat.DataArray(efile, from_binary)
+
+		self.factory = rulefactory
+		self.factory.registerContext(self)
+
+		self.sampler = sampler
+		self.sampler.registerContext(self)
+
+		self.models = []
+		self.owner = None
+
+
+	def add_model(self, model):
+		if self.owner is None:
+			self.owner = model
+		model_id = len(self.models)
+		self.models.append(model)
+		return model_id
+
+
+	def input(self, model, fwords, meta):
+		if model != self.owner:
+			return
+		self.fwords = fwords
+		self.factory.input(self.fwords, meta)
+
+
+
-- 
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