1 /* ====================================================================
2 * Licensed under the Apache License, Version 2.0 (the "License");
3 * you may not use this file except in compliance with the License.
4 * You may obtain a copy of the License at
6 * http://www.apache.org/licenses/LICENSE-2.0
8 * Unless required by applicable law or agreed to in writing, software
9 * distributed under the License is distributed on an "AS IS" BASIS,
10 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 * See the License for the specific language governing permissions and
12 * limitations under the License.
13 * ====================================================================
16 package org.apache.pylucene.search;
18 import org.apache.lucene.search.Similarity;
19 import org.apache.lucene.search.Searcher;
20 import org.apache.lucene.search.Explanation.IDFExplanation;
21 import org.apache.lucene.index.FieldInvertState;
22 import org.apache.lucene.index.Term;
23 import java.util.Collection;
26 public class PythonSimilarity extends Similarity {
28 private long pythonObject;
30 public PythonSimilarity()
34 public void pythonExtension(long pythonObject)
36 this.pythonObject = pythonObject;
38 public long pythonExtension()
40 return this.pythonObject;
43 public void finalize()
49 public IDFExplanation idfExplain(final Collection<Term> terms,
50 final Searcher searcher)
52 return new IDFExplanation() {
55 return idfTerms(terms, searcher);
58 public String explain()
65 public native void pythonDecRef();
67 public native float idfTerms(Collection terms, Searcher searcher);
69 public native float coord(int overlap, int maxOverlap);
70 public native float idf(int docFreq, int numDocs);
71 public native float computeNorm(String fieldName, FieldInvertState state);
72 public native float queryNorm(float sumOfSquaredWeights);
73 public native float sloppyFreq(int distance);
74 public native float tf(float freq);
75 public native float scorePayload(int docId, String fieldName,
76 int start, int end, byte [] payload,
77 int offset, int length);