core/Lucy/Index/Posting/MatchPosting.cfh

/* 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;

/** Match but not score documents.
 *
 * Use MatchPosting for fields which only need to be matched, not scored.  For
 * instance, if you need to determine that that a query matches a particular
 * category, but don't want the match to contribute to the document score, use
 * MatchPosting for the field.
 */
class Lucy::Index::Posting::MatchPosting cnick MatchPost
    inherits Lucy::Index::Posting {

    Similarity *sim;
    uint32_t    freq;

    inert incremented MatchPosting*
    new(Similarity *similarity);

    inert MatchPosting*
    init(MatchPosting *self, Similarity *similarity);

    public void
    Destroy(MatchPosting *self);

    int32_t
    Get_Freq(MatchPosting *self);

    void
    Read_Record(MatchPosting *self, InStream *instream);

    incremented RawPosting*
    Read_Raw(MatchPosting *self, InStream *instream, int32_t last_doc_id,
             CharBuf *term_text, MemoryPool *mem_pool);

    void
    Add_Inversion_To_Pool(MatchPosting *self, PostingPool *post_pool,
                          Inversion *inversion, FieldType *type,
                          int32_t doc_id, float doc_boost,
                          float length_norm);

    public void
    Reset(MatchPosting *self);

    incremented MatchPostingMatcher*
    Make_Matcher(MatchPosting *self, Similarity *sim, PostingList *plist,
                 Compiler *compiler, bool_t need_score);
}

class Lucy::Index::Posting::MatchPostingMatcher cnick MatchPostMatcher
    inherits Lucy::Search::TermMatcher {

    inert MatchPostingMatcher*
    init(MatchPostingMatcher *self, Similarity *similarity,
         PostingList *posting_list, Compiler *compiler);

    public float
    Score(MatchPostingMatcher *self);
}

class Lucy::Index::Posting::MatchPostingWriter cnick MatchPostWriter
    inherits Lucy::Index::Posting::PostingWriter {

    OutStream *outstream;
    int32_t    last_doc_id;

    inert incremented MatchPostingWriter*
    new(Schema *schema, Snapshot *snapshot, Segment *segment,
        PolyReader *polyreader, int32_t field_num);

    inert MatchPostingWriter*
    init(MatchPostingWriter *self, Schema *schema, Snapshot *snapshot,
         Segment *segment, PolyReader *polyreader, int32_t field_num);

    public void
    Destroy(MatchPostingWriter *self);

    void
    Write_Posting(MatchPostingWriter *self, RawPosting *posting);

    void
    Start_Term(MatchPostingWriter *self, TermInfo *tinfo);

    void
    Update_Skip_Info(MatchPostingWriter *self, TermInfo *tinfo);
}

class Lucy::Index::Posting::MatchPosting::MatchTermInfoStepper
    cnick MatchTInfoStepper inherits Lucy::Index::TermStepper {

    int32_t skip_interval;

    inert incremented MatchTermInfoStepper*
    new(Schema *schema);

    inert MatchTermInfoStepper*
    init(MatchTermInfoStepper *self, Schema *schema);

    public void
    Reset(MatchTermInfoStepper *self);

    public void
    Write_Key_Frame(MatchTermInfoStepper *self, OutStream *outstream,
                    Obj *value);

    public void
    Write_Delta(MatchTermInfoStepper *self, OutStream *outstream, Obj *value);

    public void
    Read_Key_Frame(MatchTermInfoStepper *self, InStream *instream);

    public void
    Read_Delta(MatchTermInfoStepper *self, InStream *instream);
}