| /* 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. |
| */ |
| |
| #define C_LUCY_POSTINGLISTREADER |
| #define C_LUCY_POLYPOSTINGLISTREADER |
| #define C_LUCY_DEFAULTPOSTINGLISTREADER |
| #include "Lucy/Util/ToolSet.h" |
| |
| #include "Lucy/Index/PostingListReader.h" |
| #include "Lucy/Index/LexiconReader.h" |
| #include "Lucy/Index/PostingListWriter.h" |
| #include "Lucy/Index/Segment.h" |
| #include "Lucy/Index/SegPostingList.h" |
| #include "Lucy/Index/Snapshot.h" |
| #include "Lucy/Plan/Architecture.h" |
| #include "Lucy/Plan/FieldType.h" |
| #include "Lucy/Plan/Schema.h" |
| #include "Lucy/Store/Folder.h" |
| |
| PostingListReader* |
| PListReader_init(PostingListReader *self, Schema *schema, Folder *folder, |
| Snapshot *snapshot, VArray *segments, int32_t seg_tick) { |
| DataReader_init((DataReader*)self, schema, folder, snapshot, segments, |
| seg_tick); |
| ABSTRACT_CLASS_CHECK(self, POSTINGLISTREADER); |
| return self; |
| } |
| |
| PostingListReader* |
| PListReader_aggregator(PostingListReader *self, VArray *readers, |
| I32Array *offsets) { |
| UNUSED_VAR(self); |
| UNUSED_VAR(readers); |
| UNUSED_VAR(offsets); |
| return NULL; |
| } |
| |
| DefaultPostingListReader* |
| DefPListReader_new(Schema *schema, Folder *folder, Snapshot *snapshot, |
| VArray *segments, int32_t seg_tick, |
| LexiconReader *lex_reader) { |
| DefaultPostingListReader *self |
| = (DefaultPostingListReader*)VTable_Make_Obj(DEFAULTPOSTINGLISTREADER); |
| return DefPListReader_init(self, schema, folder, snapshot, segments, |
| seg_tick, lex_reader); |
| } |
| |
| DefaultPostingListReader* |
| DefPListReader_init(DefaultPostingListReader *self, Schema *schema, |
| Folder *folder, Snapshot *snapshot, VArray *segments, |
| int32_t seg_tick, LexiconReader *lex_reader) { |
| PListReader_init((PostingListReader*)self, schema, folder, snapshot, |
| segments, seg_tick); |
| Segment *segment = DefPListReader_Get_Segment(self); |
| |
| // Derive. |
| self->lex_reader = (LexiconReader*)INCREF(lex_reader); |
| |
| // Check format. |
| { |
| Hash *my_meta = (Hash*)Seg_Fetch_Metadata_Str(segment, "postings", 8); |
| if (!my_meta) { |
| my_meta = (Hash*)Seg_Fetch_Metadata_Str(segment, |
| "posting_list", 12); |
| } |
| |
| if (my_meta) { |
| Obj *format = Hash_Fetch_Str(my_meta, "format", 6); |
| if (!format) { THROW(ERR, "Missing 'format' var"); } |
| else { |
| if (Obj_To_I64(format) != PListWriter_current_file_format) { |
| THROW(ERR, "Unsupported postings format: %i64", |
| Obj_To_I64(format)); |
| } |
| } |
| } |
| } |
| |
| return self; |
| } |
| |
| void |
| DefPListReader_close(DefaultPostingListReader *self) { |
| if (self->lex_reader) { |
| LexReader_Close(self->lex_reader); |
| DECREF(self->lex_reader); |
| self->lex_reader = NULL; |
| } |
| } |
| |
| void |
| DefPListReader_destroy(DefaultPostingListReader *self) { |
| DECREF(self->lex_reader); |
| SUPER_DESTROY(self, DEFAULTPOSTINGLISTREADER); |
| } |
| |
| SegPostingList* |
| DefPListReader_posting_list(DefaultPostingListReader *self, |
| const CharBuf *field, Obj *target) { |
| FieldType *type = Schema_Fetch_Type(self->schema, field); |
| |
| // Only return an object if we've got an indexed field. |
| if (type != NULL && FType_Indexed(type)) { |
| SegPostingList *plist = SegPList_new((PostingListReader*)self, field); |
| if (target) { SegPList_Seek(plist, target); } |
| return plist; |
| } |
| else { |
| return NULL; |
| } |
| } |
| |
| LexiconReader* |
| DefPListReader_get_lex_reader(DefaultPostingListReader *self) { |
| return self->lex_reader; |
| } |
| |