Matcher*
PhraseCompiler_Make_Matcher_IMP(PhraseCompiler *self, SegReader *reader,
bool need_score) {
UNUSED_VAR(need_score);
PhraseCompilerIVARS *const ivars = PhraseCompiler_IVARS(self);
PhraseQueryIVARS *const parent_ivars
= PhraseQuery_IVARS((PhraseQuery*)ivars->parent);
Vector *const terms = parent_ivars->terms;
uint32_t num_terms = Vec_Get_Size(terms);
// Bail if there are no terms.
if (!num_terms) { return NULL; }
// Bail unless field is valid and posting type supports positions.
Similarity *sim = PhraseCompiler_Get_Similarity(self);
Posting *posting = Sim_Make_Posting(sim);
if (posting == NULL || !Obj_is_a((Obj*)posting, SCOREPOSTING)) {
DECREF(posting);
return NULL;
}
DECREF(posting);
// Bail if there's no PostingListReader for this segment.
PostingListReader *const plist_reader
= (PostingListReader*)SegReader_Fetch(
reader, Class_Get_Name(POSTINGLISTREADER));
if (!plist_reader) { return NULL; }
// Look up each term.
Vector *plists = Vec_new(num_terms);
for (uint32_t i = 0; i < num_terms; i++) {
Obj *term = Vec_Fetch(terms, i);
PostingList *plist
= PListReader_Posting_List(plist_reader, parent_ivars->field, term);
// Bail if any one of the terms isn't in the index.
if (!plist || !PList_Get_Doc_Freq(plist)) {
DECREF(plist);
DECREF(plists);
return NULL;
}
Vec_Push(plists, (Obj*)plist);
}
Matcher *retval
= (Matcher*)PhraseMatcher_new(sim, plists, (Compiler*)self);
DECREF(plists);
return retval;
}
PostingPool*
PostPool_init(PostingPool *self, Schema *schema, Snapshot *snapshot,
Segment *segment, PolyReader *polyreader, String *field,
LexiconWriter *lex_writer, MemoryPool *mem_pool,
OutStream *lex_temp_out, OutStream *post_temp_out,
OutStream *skip_out) {
// Init.
SortEx_init((SortExternal*)self);
PostingPoolIVARS *const ivars = PostPool_IVARS(self);
ivars->doc_base = 0;
ivars->last_doc_id = 0;
ivars->doc_map = NULL;
ivars->post_count = 0;
ivars->lexicon = NULL;
ivars->plist = NULL;
ivars->lex_temp_in = NULL;
ivars->post_temp_in = NULL;
ivars->lex_start = INT64_MAX;
ivars->post_start = INT64_MAX;
ivars->lex_end = 0;
ivars->post_end = 0;
ivars->skip_stepper = SkipStepper_new();
// Assign.
ivars->schema = (Schema*)INCREF(schema);
ivars->snapshot = (Snapshot*)INCREF(snapshot);
ivars->segment = (Segment*)INCREF(segment);
ivars->polyreader = (PolyReader*)INCREF(polyreader);
ivars->lex_writer = (LexiconWriter*)INCREF(lex_writer);
ivars->mem_pool = (MemoryPool*)INCREF(mem_pool);
ivars->field = Str_Clone(field);
ivars->lex_temp_out = (OutStream*)INCREF(lex_temp_out);
ivars->post_temp_out = (OutStream*)INCREF(post_temp_out);
ivars->skip_out = (OutStream*)INCREF(skip_out);
// Derive.
Similarity *sim = Schema_Fetch_Sim(schema, field);
ivars->posting = Sim_Make_Posting(sim);
ivars->type = (FieldType*)INCREF(Schema_Fetch_Type(schema, field));
ivars->field_num = Seg_Field_Num(segment, field);
return self;
}