def getTermVectors(route):
vm_env = lucene.getVMEnv()
vm_env.attachCurrentThread()
stopWords = []
stopWordsSet = StopFilter.makeStopSet(Version.LUCENE_CURRENT,
stopWords)
analyzer = StopAnalyzer(Version.LUCENE_CURRENT, stopWordsSet)
directory = SimpleFSDirectory(File(route))
ireader = IndexReader.open(directory)
ls = []
for doc in range(ireader.numDocs()):
vector = FreqVector()
vector.vector = []
vector.freqs = []
norm = 0.0
terms = ireader.getTermVector(doc, "content")
if (terms is not None):
termsEnum = terms.iterator(None)
for term in BytesRefIterator.cast_(termsEnum):
text = term.utf8ToString()
tf = 1 + math.log(termsEnum.totalTermFreq(), 2)
t = Term("content", term)
idf = math.log(ireader.numDocs() / ireader.docFreq(t))
vector.vector.append(text)
vector.freqs.append(tf * idf)
norm += (tf * idf) * (tf * idf)
ls.append((vector, math.sqrt(norm)))
else:
ls.append((vector, 0))
return ls
def getMostFrequentTermNoStopwords(route, query):
vm_env = lucene.getVMEnv()
vm_env.attachCurrentThread()
stopWords = []
stopWordsSet = StopFilter.makeStopSet(Version.LUCENE_CURRENT,
stopWords)
analyzer = StopAnalyzer(Version.LUCENE_CURRENT, stopWordsSet)
directory = SimpleFSDirectory(File(route))
ireader = IndexReader.open(directory)
currentTerm = ""
currentTermFreq = 0
for doc in range(ireader.numDocs()):
terms = ireader.getTermVector(doc, "content")
if terms is not None:
termsEnum = terms.iterator(None)
for term in BytesRefIterator.cast_(termsEnum):
text = term.utf8ToString()
t = Term("content", term)
freq = ireader.totalTermFreq(t)
if freq > currentTermFreq and text not in query:
currentTerm = text
currentTermFreq = freq
return currentTerm
def getMostFrequentTermStopwords(route, query):
vm_env = lucene.getVMEnv()
vm_env.attachCurrentThread()
stopWords = [
"a", "an", "and", "are", "as", "at", "be", "but", "by", "for",
"if", "no", "not", "more", "http", "html", "of", "on", "or",
"such", "that", "the", "their", "then", "there", "these", "they",
"this", "to", "was", "will", "with", "el", "la", "lo", "los",
"las", "ante", "con", "sin", "que", "es", "de", "en", "por", "y",
"los"
]
stopWordsSet = StopFilter.makeStopSet(Version.LUCENE_CURRENT,
stopWords)
analyzer = StopAnalyzer(Version.LUCENE_CURRENT, stopWordsSet)
directory = SimpleFSDirectory(File(route))
ireader = IndexReader.open(directory)
currentTerm = ""
currentTermFreq = 0
for doc in range(ireader.numDocs()):
terms = ireader.getTermVector(doc, "content")
if terms is not None:
termsEnum = terms.iterator(None)
for term in BytesRefIterator.cast_(termsEnum):
text = term.utf8ToString().encode('UTF-8')
t = Term("content", term)
freq = ireader.totalTermFreq(t)
if freq > currentTermFreq and text not in query:
currentTerm = text
currentTermFreq = freq
return currentTerm
def testStop(self):
a = StopAnalyzer(EnglishAnalyzer.ENGLISH_STOP_WORDS_SET)
self._assertAnalyzesTo(a, "foo bar FOO BAR",
["foo", "bar", "foo", "bar"])
self._assertAnalyzesTo(a, "foo a bar such FOO THESE BAR",
["foo", "bar", "foo", "bar"])
def createIndexStopwords(texts, route, rebuild):
vm_env = lucene.getVMEnv()
vm_env.attachCurrentThread()
stopWords = [
"a", "an", "and", "are", "as", "at", "be", "but", "by", "for",
"if", "no", "not", "of", "on", "or", "such", "that", "the",
"their", "then", "there", "these", "they", "this", "to", "was",
"will", "with", "el", "la", "lo", "los", "las", "ante", "con",
"sin", "que", "es", "de", "en", "por", "y", "los"
]
stopWordsSet = StopFilter.makeStopSet(Version.LUCENE_CURRENT,
stopWords)
analyzer = StopAnalyzer(Version.LUCENE_CURRENT, stopWordsSet)
directory = SimpleFSDirectory(File(route))
conf = IndexWriterConfig(Version.LUCENE_4_10_1, analyzer)
if rebuild:
conf.setOpenMode(IndexWriterConfig.OpenMode.CREATE)
else:
conf.setOpenMode(IndexWriterConfig.OpenMode.CREATE_OR_APPEND)
iwriter = IndexWriter(directory, conf)
for key in texts:
doc = Document()
doc.add(
Field("docName", key.__str__(), Field.Store.YES,
Field.Index.NOT_ANALYZED))
doc.add(
Field("content", texts[key], Field.Store.YES,
Field.Index.ANALYZED, Field.TermVector.YES))
iwriter.addDocument(doc)
iwriter.close()
def testStopList(self):
stopWords = ["good", "test", "analyzer"]
stopWordsSet = StopFilter.makeStopSet(stopWords)
newStop = StopAnalyzer(stopWordsSet)
reader = StringReader("This is a good test of the english stop analyzer")
stream = newStop.tokenStream("test", reader)
self.assert_(stream is not None)
stream.reset()
termAtt = stream.getAttribute(CharTermAttribute.class_)
while stream.incrementToken():
text = termAtt.toString()
self.assert_(text not in stopWordsSet)
def testStop(self):
a = StopAnalyzer()
self._assertAnalyzesTo(a, "foo bar FOO BAR",
["foo", "bar", "foo", "bar"])
self._assertAnalyzesTo(a, "foo a bar such FOO THESE BAR",
["foo", "bar", "foo", "bar"])
def testStop(self):
a = StopAnalyzer(Version.LUCENE_CURRENT)
self._assertAnalyzesTo(a, "foo bar FOO BAR",
["foo", "bar", "foo", "bar"])
self._assertAnalyzesTo(a, "foo a bar such FOO THESE BAR",
["foo", "bar", "foo", "bar"])
def createIndexNoStopwords(texts, route, rebuild):
vm_env = lucene.getVMEnv()
vm_env.attachCurrentThread()
stopWords = []
stopWordsSet = StopFilter.makeStopSet(Version.LUCENE_CURRENT,
stopWords)
analyzer = StopAnalyzer(Version.LUCENE_CURRENT, stopWordsSet)
directory = SimpleFSDirectory(File(route))
conf = IndexWriterConfig(Version.LUCENE_4_10_1, analyzer)
if rebuild:
conf.setOpenMode(IndexWriterConfig.OpenMode.CREATE)
else:
conf.setOpenMode(IndexWriterConfig.OpenMode.CREATE_OR_APPEND)
iwriter = IndexWriter(directory, conf)
for key in texts:
doc = Document()
doc.add(
Field("docName", "doc", Field.Store.YES,
Field.Index.NOT_ANALYZED))
doc.add(
Field("content", texts[key], Field.Store.YES,
Field.Index.ANALYZED, Field.TermVector.YES))
iwriter.addDocument(doc)
iwriter.close()
def __init__(self):
# self.analyzer = StandardAnalyzer()
# self.analyzer = PersianAnalyzer(StopFilter.makeStopSet(sw))
# self.analyzer = PersianAnalyzer()
self.analyzer = StopAnalyzer(Paths.get(Config.stop_words_address))
self.config = IndexWriterConfig(self.analyzer)
self.index = RAMDirectory()
self.w = IndexWriter(self.index, self.config)
def testStopListPositions(self):
stopWords = ["good", "test", "analyzer"]
stopWordsSet = StopFilter.makeStopSet(stopWords)
newStop = StopAnalyzer(stopWordsSet)
reader = StringReader("This is a good test of the english stop analyzer with positions")
expectedIncr = [ 1, 1, 1, 3, 1, 1, 1, 2, 1]
stream = newStop.tokenStream("test", reader)
self.assert_(stream is not None)
stream.reset()
i = 0
termAtt = stream.getAttribute(CharTermAttribute.class_)
posIncrAtt = stream.addAttribute(PositionIncrementAttribute.class_)
while stream.incrementToken():
text = termAtt.toString()
self.assert_(text not in stopWordsSet)
self.assertEqual(expectedIncr[i],
posIncrAtt.getPositionIncrement())
i += 1
def testPhraseQueryWithStopAnalyzer(self):
writer = self.getWriter(analyzer=StopAnalyzer(Version.LUCENE_CURRENT))
doc = Document()
doc.add(Field("field", "the stop words are here", TextField.TYPE_STORED))
writer.addDocument(doc)
writer.close()
searcher = self.getSearcher()
# valid exact phrase query
query = PhraseQuery()
query.add(Term("field", "stop"))
query.add(Term("field", "words"))
scoreDocs = searcher.search(query, None, 50).scoreDocs
self.assertEqual(1, len(scoreDocs))
def testPhraseQueryWithStopAnalyzer(self):
writer = self.getWriter(analyzer=StopAnalyzer(EnglishAnalyzer.ENGLISH_STOP_WORDS_SET))
doc = Document()
doc.add(Field("field", "the stop words are here", TextField.TYPE_STORED))
writer.addDocument(doc)
writer.close()
searcher = self.getSearcher()
# valid exact phrase query
builder = PhraseQuery.Builder()
builder.add(Term("field", "stop"))
builder.add(Term("field", "words"))
scoreDocs = searcher.search(builder.build(), 50).scoreDocs
self.assertEqual(1, len(scoreDocs))
def getFreqVectorFromText(self, text):
# Initialization of Java Virtual Machine with Lucene
vm_env = lucene.getVMEnv()
vm_env.attachCurrentThread()
indexDir = "res/index"
stopWords = []
stopWordsSet = StopFilter.makeStopSet(Version.LUCENE_CURRENT, stopWords)
analyzer = StopAnalyzer(Version.LUCENE_CURRENT, stopWordsSet)
directory = SimpleFSDirectory(File(indexDir))
conf = IndexWriterConfig(Version.LUCENE_4_10_1, analyzer)
rebuild = True
if rebuild:
conf.setOpenMode(IndexWriterConfig.OpenMode.CREATE)
else:
conf.setOpenMode(IndexWriterConfig.OpenMode.CREATE_OR_APPEND)
iwriter = IndexWriter(directory, conf)
doc = Document()
doc.add(Field("docName", 'url', Field.Store.YES, Field.Index.NOT_ANALYZED))
doc.add(Field("content", text, Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.YES))
iwriter.addDocument(doc)
iwriter.close()
ireader = IndexReader.open(directory)
freqVector = []
docVector = ireader.getTermVector(0, "content")
termsEnum = docVector.iterator(None)
for term in BytesRefIterator.cast_(termsEnum):
text = term.utf8ToString()
freq = termsEnum.totalTermFreq()
freqVector.append((text, freq))
freqVector = sorted(freqVector, key=itemgetter(1), reverse=True)
self.vector = list()
self.freqs = list()
for el in freqVector:
self.vector.append(el[0])
self.freqs.append(el[1])
class StopAnalyzerTestCase(unittest.TestCase):
"""
Unit tests ported from Java Lucene
"""
def setUp(self):
self.stop = StopAnalyzer()
self.invalidTokens = StopAnalyzer.ENGLISH_STOP_WORDS_SET
def testDefaults(self):
self.assert_(self.stop is not None)
reader = StringReader("This is a test of the english stop analyzer")
stream = self.stop.tokenStream("test", reader)
self.assert_(stream is not None)
stream.reset()
termAtt = stream.getAttribute(CharTermAttribute.class_)
while stream.incrementToken():
self.assert_(termAtt.toString() not in self.invalidTokens)
def testStopList(self):
stopWords = ["good", "test", "analyzer"]
stopWordsSet = StopFilter.makeStopSet(stopWords)
newStop = StopAnalyzer(stopWordsSet)
reader = StringReader("This is a good test of the english stop analyzer")
stream = newStop.tokenStream("test", reader)
self.assert_(stream is not None)
stream.reset()
termAtt = stream.getAttribute(CharTermAttribute.class_)
while stream.incrementToken():
text = termAtt.toString()
self.assert_(text not in stopWordsSet)
def testStopListPositions(self):
stopWords = ["good", "test", "analyzer"]
stopWordsSet = StopFilter.makeStopSet(stopWords)
newStop = StopAnalyzer(stopWordsSet)
reader = StringReader("This is a good test of the english stop analyzer with positions")
expectedIncr = [ 1, 1, 1, 3, 1, 1, 1, 2, 1]
stream = newStop.tokenStream("test", reader)
self.assert_(stream is not None)
stream.reset()
i = 0
termAtt = stream.getAttribute(CharTermAttribute.class_)
posIncrAtt = stream.addAttribute(PositionIncrementAttribute.class_)
while stream.incrementToken():
text = termAtt.toString()
self.assert_(text not in stopWordsSet)
self.assertEqual(expectedIncr[i],
posIncrAtt.getPositionIncrement())
i += 1
def setUp(self):
self.stop = StopAnalyzer(Version.LUCENE_CURRENT)
self.invalidTokens = StopAnalyzer.ENGLISH_STOP_WORDS_SET
def setUp(self):
self.stop = StopAnalyzer()
self.invalidTokens = StopAnalyzer.ENGLISH_STOP_WORDS_SET
def parseQuery(myQuery):
parser = QueryParser("", StopAnalyzer())
parsedQuery = parser.parse(myQuery)
myQueryTerms = parsedQuery.toString().split(" ")
return myQueryTerms
