Constructor Detail

• ConstantWeight

  public ConstantWeight​(Searcher searcher)
                 throws IOException

  Throws:

  IOException

Method Detail

• getQuery

  public Query getQuery()

  Description copied from class: Weight
  The query that this concerns.

  Specified by:

  getQuery in class Weight

• getValue

  public float getValue()

  Description copied from class: Weight
  The weight for this query.

  Specified by:

  getValue in class Weight

• sumOfSquaredWeights

  public float sumOfSquaredWeights()
                            throws IOException

  Description copied from class: Weight
  The sum of squared weights of contained query clauses.

  Specified by:

  sumOfSquaredWeights in class Weight

  Throws:

  IOException

• normalize

  public void normalize​(float norm)

  Description copied from class: Weight
  Assigns the query normalization factor to this.

  Specified by:

  normalize in class Weight

• scorer

  public Scorer scorer​(IndexReader reader,
                       boolean scoreDocsInOrder,
                       boolean topScorer)
                throws IOException

  Description copied from class: Weight
  Returns a Scorer which scores documents in/out-of order according to scoreDocsInOrder.

  NOTE: even if scoreDocsInOrder is false, it is recommended to check whether the returned Scorer indeed scores documents out of order (i.e., call Weight.scoresDocsOutOfOrder()), as some Scorer implementations will always return documents in-order.
  NOTE: null can be returned if no documents will be scored by this query.

  Specified by:

  scorer in class Weight

  Parameters:

  reader - the IndexReader for which to return the Scorer.

  scoreDocsInOrder - specifies whether in-order scoring of documents is required. Note that if set to false (i.e., out-of-order scoring is required), this method can return whatever scoring mode it supports, as every in-order scorer is also an out-of-order one. However, an out-of-order scorer may not support DocIdSetIterator.nextDoc() and/or DocIdSetIterator.advance(int), therefore it is recommended to request an in-order scorer if use of these methods is required.

  topScorer - if true, Scorer.score(Collector) will be called; if false, DocIdSetIterator.nextDoc() and/or DocIdSetIterator.advance(int) will be called.

  Returns:

  a Scorer which scores documents in/out-of order.

  Throws:

  IOException

• scoresDocsOutOfOrder

  public boolean scoresDocsOutOfOrder()

  Description copied from class: Weight
  Returns true iff this implementation scores docs only out of order. This method is used in conjunction with Collector's acceptsDocsOutOfOrder and Weight.scorer(org.apache.lucene.index.IndexReader, boolean, boolean) to create a matching Scorer instance for a given Collector, or vice versa.

  NOTE: the default implementation returns false, i.e. the Scorer scores documents in-order.

  Overrides:

  scoresDocsOutOfOrder in class Weight

• explain

  public Explanation explain​(IndexReader reader,
                             int doc)
                      throws IOException

  Description copied from class: Weight
  An explanation of the score computation for the named document.

  Specified by:

  explain in class Weight

  Parameters:

  reader - sub-reader containing the give doc

  Returns:

  an Explanation for the score

  Throws:

  IOException