/* ====================================================================
* Licensed 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.
* ====================================================================
*/
package org.apache.pylucene.search;
import org.apache.lucene.search.Similarity;
import org.apache.lucene.search.Searcher;
import org.apache.lucene.search.Explanation.IDFExplanation;
import org.apache.lucene.index.FieldInvertState;
import org.apache.lucene.index.Term;
import java.util.Collection;
public class PythonSimilarity extends Similarity {
private long pythonObject;
public PythonSimilarity()
{
}
public void pythonExtension(long pythonObject)
{
this.pythonObject = pythonObject;
}
public long pythonExtension()
{
return this.pythonObject;
}
public void finalize()
throws Throwable
{
pythonDecRef();
}
public IDFExplanation idfExplain(final Collection<Term> terms,
final Searcher searcher)
{
return new IDFExplanation() {
public float getIdf()
{
return idfTerms(terms, searcher);
}
public String explain()
{
return null;
}
};
}
public native void pythonDecRef();
public native float idfTerms(Collection terms, Searcher searcher);
public native float coord(int overlap, int maxOverlap);
public native float idf(int docFreq, int numDocs);
public native float computeNorm(String fieldName, FieldInvertState state);
public native float queryNorm(float sumOfSquaredWeights);
public native float sloppyFreq(int distance);
public native float tf(float freq);
public native float scorePayload(int docId, String fieldName,
int start, int end, byte [] payload,
int offset, int length);
}