pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.4.0 / lucene / src / java / org / apache / lucene / search / spans / SpanWeight.java

diff --git a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/spans/SpanWeight.java b/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/spans/SpanWeight.java
deleted file mode 100644 (file)
index 28fd905..0000000
--- a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/spans/SpanWeight.java
+++ /dev/null
@@ -1,142 +0,0 @@
-package org.apache.lucene.search.spans;
-
-/**
- * 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.
- */
-
-import org.apache.lucene.index.IndexReader;
-import org.apache.lucene.index.Term;
-import org.apache.lucene.search.*;
-import org.apache.lucene.search.Explanation.IDFExplanation;
-
-import java.io.IOException;
-import java.util.HashSet;
-import java.util.Set;
-
-/**
- * Expert-only.  Public for use by other weight implementations
- */
-public class SpanWeight extends Weight {
-  protected Similarity similarity;
-  protected float value;
-  protected float idf;
-  protected float queryNorm;
-  protected float queryWeight;
-
-  protected Set<Term> terms;
-  protected SpanQuery query;
-  private IDFExplanation idfExp;
-
-  public SpanWeight(SpanQuery query, Searcher searcher)
-    throws IOException {
-    this.similarity = query.getSimilarity(searcher);
-    this.query = query;
-    
-    terms=new HashSet<Term>();
-    query.extractTerms(terms);
-    
-    idfExp = similarity.idfExplain(terms, searcher);
-    idf = idfExp.getIdf();
-  }
-
-  @Override
-  public Query getQuery() { return query; }
-
-  @Override
-  public float getValue() { return value; }
-
-  @Override
-  public float sumOfSquaredWeights() throws IOException {
-    queryWeight = idf * query.getBoost();         // compute query weight
-    return queryWeight * queryWeight;             // square it
-  }
-
-  @Override
-  public void normalize(float queryNorm) {
-    this.queryNorm = queryNorm;
-    queryWeight *= queryNorm;                     // normalize query weight
-    value = queryWeight * idf;                    // idf for document
-  }
-
-  @Override
-  public Scorer scorer(IndexReader reader, boolean scoreDocsInOrder, boolean topScorer) throws IOException {
-    return new SpanScorer(query.getSpans(reader), this, similarity, reader
-        .norms(query.getField()));
-  }
-
-  @Override
-  public Explanation explain(IndexReader reader, int doc)
-    throws IOException {
-
-    ComplexExplanation result = new ComplexExplanation();
-    result.setDescription("weight("+getQuery()+" in "+doc+"), product of:");
-    String field = ((SpanQuery)getQuery()).getField();
-
-    Explanation idfExpl =
-      new Explanation(idf, "idf(" + field + ": " + idfExp.explain() + ")");
-
-    // explain query weight
-    Explanation queryExpl = new Explanation();
-    queryExpl.setDescription("queryWeight(" + getQuery() + "), product of:");
-
-    Explanation boostExpl = new Explanation(getQuery().getBoost(), "boost");
-    if (getQuery().getBoost() != 1.0f)
-      queryExpl.addDetail(boostExpl);
-    queryExpl.addDetail(idfExpl);
-
-    Explanation queryNormExpl = new Explanation(queryNorm,"queryNorm");
-    queryExpl.addDetail(queryNormExpl);
-
-    queryExpl.setValue(boostExpl.getValue() *
-                       idfExpl.getValue() *
-                       queryNormExpl.getValue());
-
-    result.addDetail(queryExpl);
-
-    // explain field weight
-    ComplexExplanation fieldExpl = new ComplexExplanation();
-    fieldExpl.setDescription("fieldWeight("+field+":"+query.toString(field)+
-                             " in "+doc+"), product of:");
-
-    Explanation tfExpl = ((SpanScorer)scorer(reader, true, false)).explain(doc);
-    fieldExpl.addDetail(tfExpl);
-    fieldExpl.addDetail(idfExpl);
-
-    Explanation fieldNormExpl = new Explanation();
-    byte[] fieldNorms = reader.norms(field);
-    float fieldNorm =
-      fieldNorms!=null ? similarity.decodeNormValue(fieldNorms[doc]) : 1.0f;
-    fieldNormExpl.setValue(fieldNorm);
-    fieldNormExpl.setDescription("fieldNorm(field="+field+", doc="+doc+")");
-    fieldExpl.addDetail(fieldNormExpl);
-
-    fieldExpl.setMatch(Boolean.valueOf(tfExpl.isMatch()));
-    fieldExpl.setValue(tfExpl.getValue() *
-                       idfExpl.getValue() *
-                       fieldNormExpl.getValue());
-
-    result.addDetail(fieldExpl);
-    result.setMatch(fieldExpl.getMatch());
-
-    // combine them
-    result.setValue(queryExpl.getValue() * fieldExpl.getValue());
-
-    if (queryExpl.getValue() == 1.0f)
-      return fieldExpl;
-
-    return result;
-  }
-}