Class Query

    • Constructor Detail

      • Query

        public Query()
    • Method Detail

      • setBoost

        public void setBoost​(float b)
        Sets the boost for this query clause to b. Documents matching this clause will (in addition to the normal weightings) have their score multiplied by b.
      • getBoost

        public float getBoost()
        Gets the boost for this clause. Documents matching this clause will (in addition to the normal weightings) have their score multiplied by b. The boost is 1.0 by default.
      • toString

        public abstract String toString​(String field)
        Prints a query to a string, with field assumed to be the default field and omitted.
      • toString

        public String toString()
        Prints a query to a string.
        Overrides:
        toString in class Object
      • createWeight

        public Weight createWeight​(IndexSearcher searcher)
                            throws IOException
        Expert: Constructs an appropriate Weight implementation for this query.

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

        Throws:
        IOException
      • rewrite

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

        public void extractTerms​(Set<Term> terms)
        Expert: adds all terms occurring in this query to the terms set. Only works if this query is in its rewritten form.
        Throws:
        UnsupportedOperationException - if this query is not yet rewritten
      • clone

        public Query clone()
        Returns a clone of this query.
      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class Object