ExactPhraseScorerpublic final class ExactPhraseScorer extends PhraseScorer | Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License. |
| Methods Summary |
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| protected final float | phraseFreq()
// sort list with pq
pq.clear();
for (PhrasePositions pp = first; pp != null; pp = pp.next) {
pp.firstPosition();
pq.put(pp); // build pq from list
}
pqToList(); // rebuild list from pq
// for counting how many times the exact phrase is found in current document,
// just count how many times all PhrasePosition's have exactly the same position.
int freq = 0;
do { // find position w/ all terms
while (first.position < last.position) { // scan forward in first
do {
if (!first.nextPosition())
return (float)freq;
} while (first.position < last.position);
firstToLast();
}
freq++; // all equal: a match
} while (last.nextPosition());
return (float)freq;
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