/* 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.
 */

parcel Lucy;

/** Join results for two Queries, one required, one optional.
 *
 * RequiredOptionalQuery joins the result sets of one Query which MUST match,
 * and one Query which SHOULD match.  When only the required Query matches,
 * its score is passed along; when both match, the scores are summed.
 */

public class Lucy::Search::RequiredOptionalQuery cnick ReqOptQuery
    inherits Lucy::Search::PolyQuery {

    inert incremented RequiredOptionalQuery*
    new(Query *required_query, Query *optional_query);

    /**
     * @param required_query Query must must match.
     * @param optional_query Query which should match.
     */
    public inert RequiredOptionalQuery*
    init(RequiredOptionalQuery *self, Query *required_query,
         Query *optional_query);

    /** Getter for the required Query. */
    public Query*
    Get_Required_Query(RequiredOptionalQuery *self);

    /** Setter for the required Query. */
    public void
    Set_Required_Query(RequiredOptionalQuery *self, Query *required_query);

    /** Getter for the optional Query. */
    public Query*
    Get_Optional_Query(RequiredOptionalQuery *self);

    /** Setter for the optional Query. */
    public void
    Set_Optional_Query(RequiredOptionalQuery *self, Query *optional_query);

    public incremented Compiler*
    Make_Compiler(RequiredOptionalQuery *self, Searcher *searcher,
                  float boost, bool_t subordinate = false);

    public incremented CharBuf*
    To_String(RequiredOptionalQuery *self);

    public bool_t
    Equals(RequiredOptionalQuery *self, Obj *other);
}

class Lucy::Search::RequiredOptionalCompiler cnick ReqOptCompiler
    inherits Lucy::Search::PolyCompiler {

    inert incremented RequiredOptionalCompiler*
    new(RequiredOptionalQuery *parent, Searcher *searcher, float boost);

    inert RequiredOptionalCompiler*
    init(RequiredOptionalCompiler *self, RequiredOptionalQuery *parent,
         Searcher *searcher, float boost);

    public incremented nullable Matcher*
    Make_Matcher(RequiredOptionalCompiler *self, SegReader *reader,
                 bool_t need_score);
}