/* 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;

/** Union multiple result sets.
 *
 * ORQuery is a composite L<Query|Lucy::Search::Query> which matches
 * when any of its children match, so its result set is the union of their
 * result sets.  Matching documents recieve a summed score from all matching
 * child Queries.
 */

class Lucy::Search::ORQuery inherits Lucy::Search::PolyQuery
    : dumpable {

    inert incremented ORQuery*
    new(VArray *children = NULL);

    /**
     * @param children An array of child Queries.
     */
    public inert ORQuery*
    init(ORQuery *self, VArray *children = NULL);

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

    public incremented CharBuf*
    To_String(ORQuery *self);

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

class Lucy::Search::ORCompiler
    inherits Lucy::Search::PolyCompiler {

    inert incremented ORCompiler*
    new(ORQuery *parent, Searcher *searcher, float boost);

    inert ORCompiler*
    init(ORCompiler *self, ORQuery *parent, Searcher *searcher,
         float boost);

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