Class ConstantScoreQuery

    • Field Detail

      • filter

        protected final Filter filter
      • query

        protected final Query query
    • Constructor Detail

      • ConstantScoreQuery

        public ConstantScoreQuery​(Query query)
        Strips off scores from the passed in Query. The hits will get a constant score dependent on the boost factor of this query.
      • ConstantScoreQuery

        public ConstantScoreQuery​(Filter filter)
        Wraps a Filter as a Query. The hits will get a constant score dependent on the boost factor of this query. If you simply want to strip off scores from a Query, no longer use new ConstantScoreQuery(new QueryWrapperFilter(query)), instead use ConstantScoreQuery(Query)!
    • Method Detail

      • getFilter

        public Filter getFilter()
        Returns the encapsulated filter, returns null if a query is wrapped.
      • getQuery

        public Query getQuery()
        Returns the encapsulated query, returns null if a filter is wrapped.
      • rewrite

        public Query rewrite​(IndexReader reader)
                      throws IOException
        Description copied from class: Query
        Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.
        Overrides:
        rewrite in class Query
        Throws:
        IOException
      • extractTerms

        public void extractTerms​(Set<Term> terms)
        Description copied from class: Query
        Expert: adds all terms occurring in this query to the terms set. Only works if this query is in its rewritten form.
        Overrides:
        extractTerms in class Query
      • createWeight

        public Weight createWeight​(Searcher searcher)
                            throws IOException
        Description copied from class: Query
        Expert: Constructs an appropriate Weight implementation for this query.

        Only implemented by primitive queries, which re-write to themselves.

        Overrides:
        createWeight in class Query
        Throws:
        IOException
      • toString

        public String toString​(String field)
        Description copied from class: Query
        Prints a query to a string, with field assumed to be the default field and omitted.

        The representation used is one that is supposed to be readable by QueryParser. However, there are the following limitations:

        • If the query was created by the parser, the printed representation may not be exactly what was parsed. For example, characters that need to be escaped will be represented without the required backslash.
        • Some of the more complicated queries (e.g. span queries) don't have a representation that can be parsed by QueryParser.
        Specified by:
        toString in class Query
      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class Query