Example usage for org.apache.lucene.search Weight explain

List of usage examples for org.apache.lucene.search Weight explain

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Introduction

In this page you can find the example usage for org.apache.lucene.search Weight explain.

Prototype

public abstract Explanation explain(LeafReaderContext context, int doc) throws IOException;

Source Link

Document

An explanation of the score computation for the named document.

Usage

From source file:com.sindicetech.siren.search.node.TestNodePhraseQuery.java

License:Open Source License

@Test
public void testExplain() throws IOException {
    this.addDocuments("\"Renaud Delbru\" . ", "\"Renaud Delbru\" . \"Renaud Delbru\" . ");

    final Query query = npq("renaud", "delbru").getLuceneProxyQuery();

    final Weight w = query.createWeight(searcher);

    // Explain entity 0 : 1 match
    Explanation explanation = w.explain((AtomicReaderContext) reader.getContext(), 0);
    assertNotNull("explanation is null and it shouldn't be", explanation);

    //    final Similarity sim = searcher.getSimilarity();
    // TODO: The similarity is randomly set
    //     System.out.println("Explanation: " + explanation.toString());
    //    //All this Explain does is return the term frequency
    //    assertEquals("term frq is not 1",
    //      sim.tf(1), explanation.getDetails()[1].getDetails()[0].getValue(), 0.01);

    // Explain entity 1 : 2 match
    explanation = w.explain((AtomicReaderContext) reader.getContext(), 1);
    assertNotNull("explanation is null and it shouldn't be", explanation);
    // TODO: The similarity is randomly set
    //     System.out.println("Explanation: " + explanation.toString());
    //    //All this Explain does is return the term frequency
    //    assertEquals("term frq is not 2",
    //      sim.tf(2), explanation.getDetails()[1].getDetails()[0].getValue(), 0f);

    // Explain non existing entity
    explanation = w.explain((AtomicReaderContext) reader.getContext(), 2);
    assertNotNull("explanation is null and it shouldn't be", explanation);
    //    System.out.println("Explanation: " + explanation.toString());
    //All this Explain does is return the term frequency
    assertEquals("term frq is not 0", 0f, explanation.getValue(), 0f);
}

From source file:com.sindicetech.siren.search.node.TestNodeTermQuery.java

License:Open Source License

@Test
public void testExplain() throws IOException {
    this.addDocumentNoNorms(
            "<http://renaud.delbru.fr/rdf/foaf#me> <http://xmlns.com/foaf/0.1/name> \"Renaud Delbru\" . ");

    final Query query = ntq("renaud").getLuceneProxyQuery();
    final Weight w = searcher.createNormalizedWeight(query);
    assertTrue(searcher.getTopReaderContext() instanceof AtomicReaderContext);
    final AtomicReaderContext context = (AtomicReaderContext) searcher.getTopReaderContext();

    // Explain entity 0
    Explanation explanation = w.explain(context, 0);
    assertNotNull("explanation is null and it shouldn't be", explanation);

    // TODO: the similarity is random
    // All this Explain does is return the term frequency
    //    final float termFreq = explanation.getDetails()[0].getDetails()[0].getValue();
    //    assertEquals("term frq is not 2", 2f, termFreq, 0f);

    // Explain non existing entity
    explanation = w.explain(context, 1);
    assertNotNull("explanation is null and it shouldn't be", explanation);
    //All this Explain does is return the term frequency
    assertEquals("term frq is not 0", 0f, explanation.getValue(), 0f);
}

From source file:org.apache.solr.ltr.LTRRescorer.java

License:Apache License

@Override
public Explanation explain(IndexSearcher searcher, Explanation firstPassExplanation, int docID)
        throws IOException {

    final List<LeafReaderContext> leafContexts = searcher.getTopReaderContext().leaves();
    final int n = ReaderUtil.subIndex(docID, leafContexts);
    final LeafReaderContext context = leafContexts.get(n);
    final int deBasedDoc = docID - context.docBase;
    final Weight modelWeight = searcher.createNormalizedWeight(scoringQuery, true);
    return modelWeight.explain(context, deBasedDoc);
}

From source file:org.elasticsearch.index.query.functionscore.FunctionScoreTests.java

License:Apache License

public Explanation getFunctionScoreExplanation(IndexSearcher searcher, ScoreFunction scoreFunction)
        throws IOException {
    FunctionScoreQuery functionScoreQuery = new FunctionScoreQuery(new TermQuery(TERM), scoreFunction, 0.0f);
    functionScoreQuery.setCombineFunction(CombineFunction.AVG);
    Weight weight = searcher.createNormalizedWeight(functionScoreQuery, true);
    Explanation explanation = weight.explain(searcher.getIndexReader().leaves().get(0), 0);
    return explanation.getDetails()[1];
}

From source file:org.elasticsearch.index.query.functionscore.FunctionScoreTests.java

License:Apache License

protected Explanation getExplanation(IndexSearcher searcher,
        FiltersFunctionScoreQuery filtersFunctionScoreQuery) throws IOException {
    Weight weight = searcher.createNormalizedWeight(filtersFunctionScoreQuery, true);
    return weight.explain(searcher.getIndexReader().leaves().get(0), 0);
}

From source file:org.sindice.siren.search.TestSirenPhraseQuery.java

License:Apache License

@Test
public void testExplain() throws IOException {
    _helper.addDocument("\"Renaud Delbru\" . ");
    _helper.addDocument("\"Renaud Delbru\" . \"Renaud Delbru\" . ");

    final Term t1 = new Term(QueryTestingHelper.DEFAULT_FIELD, "renaud");
    final Term t2 = new Term(QueryTestingHelper.DEFAULT_FIELD, "delbru");
    final SirenPhraseQuery query = new SirenPhraseQuery();
    query.add(t1);/*  ww  w .jav  a  2  s  . c  om*/
    query.add(t2);
    final Weight w = query.weight(_helper.getSearcher());
    final IndexReader reader = _helper.getIndexReader();

    // Explain entity 0 : 1 match
    Explanation explanation = w.explain(reader, 0);
    assertNotNull("explanation is null and it shouldn't be", explanation);
    // System.out.println("Explanation: " + explanation.toString());
    //All this Explain does is return the term frequency
    assertEquals("term frq is not 1", _helper.getSearcher().getSimilarity().tf(1),
            explanation.getDetails()[1].getDetails()[0].getValue(), 0.01);

    // Explain entity 1 : 2 match
    explanation = w.explain(reader, 1);
    assertNotNull("explanation is null and it shouldn't be", explanation);
    // System.out.println("Explanation: " + explanation.toString());
    //All this Explain does is return the term frequency
    assertEquals("term frq is not 2", _helper.getSearcher().getSimilarity().tf(2),
            explanation.getDetails()[1].getDetails()[0].getValue(), 0f);

    // Explain non existing entity
    explanation = w.explain(reader, 2);
    assertNotNull("explanation is null and it shouldn't be", explanation);
    //System.out.println("Explanation: " + explanation.toString());
    //All this Explain does is return the term frequency
    assertEquals("term frq is not 0", 0f, explanation.getValue(), 0f);
}

From source file:org.sindice.siren.search.TestSirenTermQuery.java

License:Apache License

/**
 * Check if explanation is correct/*from   ww  w  .  j a  v a  2  s . com*/
 */
@Test
public void testWeight() throws Exception {
    _helper.addDocument("\"Renaud Delbru\" . ");
    _helper.addDocument("\"Renaud\" . ");

    final SirenTermQuery query = new SirenTermQuery(new Term("content", "renaud"));
    final Weight w = query.weight(_helper.getSearcher());
    assertNotNull(w);
    final Explanation explain = w.explain(_helper.getIndexReader(), 0);
    assertNotNull(explain);
    assertTrue(explain.isMatch());
    assertEquals(0.37158427f, explain.getValue(), 0f);
    //System.out.println(explain.toString());
}

From source file:org.sindice.siren.search.TestSirenTermQuery.java

License:Apache License

@Test
public void testExplain() throws IOException {
    _helper.addDocument("\"Renaud\" . ");

    final Term t = new Term(QueryTestingHelper.DEFAULT_FIELD, "renaud");
    final SirenTermQuery query = new SirenTermQuery(t);
    final Weight w = query.weight(_helper.getSearcher());
    final IndexReader reader = _helper.getIndexReader();

    // Explain entity 0
    Explanation explanation = w.explain(reader, 0);
    assertNotNull("explanation is null and it shouldn't be", explanation);
    System.out.println("Explanation: " + explanation.toString());
    //All this Explain does is return the term frequency
    assertEquals("term frq is not 1", 1f, explanation.getDetails()[0].getValue(), 0f);

    // Explain non existing entity
    explanation = w.explain(reader, 1);//  www.  j a va 2s.c  o  m
    assertNotNull("explanation is null and it shouldn't be", explanation);
    //System.out.println("Explanation: " + explanation.toString());
    //All this Explain does is return the term frequency
    assertEquals("term frq is not 0", 0f, explanation.getValue(), 0f);
}

From source file:uk.co.flax.luwak.util.ForceNoBulkScoringQuery.java

License:Apache License

@Override
public Weight createWeight(IndexSearcher searcher, boolean needsScores) throws IOException {

    final Weight innerWeight = inner.createWeight(searcher, needsScores);

    return new Weight(ForceNoBulkScoringQuery.this) {
        @Override/*from  w w  w. j a v a2  s . co m*/
        public void extractTerms(Set<Term> set) {
            innerWeight.extractTerms(set);
        }

        @Override
        public Explanation explain(LeafReaderContext leafReaderContext, int i) throws IOException {
            return innerWeight.explain(leafReaderContext, i);
        }

        @Override
        public float getValueForNormalization() throws IOException {
            return innerWeight.getValueForNormalization();
        }

        @Override
        public void normalize(float v, float v1) {
            innerWeight.normalize(v, v1);
        }

        @Override
        public Scorer scorer(LeafReaderContext leafReaderContext) throws IOException {
            return innerWeight.scorer(leafReaderContext);
        }
    };
}