modify rerank and splitter code directory (#4924)

api/core/indexing_runner.py

 from flask_login import current_user
 from sqlalchemy.orm.exc import ObjectDeletedError
 
-from core.docstore.dataset_docstore import DatasetDocumentStore
 from core.errors.error import ProviderTokenNotInitError
 from core.llm_generator.llm_generator import LLMGenerator
 from core.model_manager import ModelInstance, ModelManager
 from core.model_runtime.model_providers.__base.large_language_model import LargeLanguageModel
 from core.model_runtime.model_providers.__base.text_embedding_model import TextEmbeddingModel
 from core.rag.datasource.keyword.keyword_factory import Keyword
+from core.rag.docstore.dataset_docstore import DatasetDocumentStore
 from core.rag.extractor.entity.extract_setting import ExtractSetting
 from core.rag.index_processor.index_processor_base import BaseIndexProcessor
 from core.rag.index_processor.index_processor_factory import IndexProcessorFactory
 from core.rag.models.document import Document
-from core.splitter.fixed_text_splitter import EnhanceRecursiveCharacterTextSplitter, FixedRecursiveCharacterTextSplitter
-from core.splitter.text_splitter import TextSplitter
+from core.rag.splitter.fixed_text_splitter import (
+    EnhanceRecursiveCharacterTextSplitter,
+    FixedRecursiveCharacterTextSplitter,
+)
+from core.rag.splitter.text_splitter import TextSplitter
 from extensions.ext_database import db
 from extensions.ext_redis import redis_client
 from extensions.ext_storage import storage

api/core/rag/data_post_processor/data_post_processor.py

 from core.model_runtime.errors.invoke import InvokeAuthorizationError
 from core.rag.data_post_processor.reorder import ReorderRunner
 from core.rag.models.document import Document
-from core.rerank.rerank import RerankRunner
+from core.rag.rerank.rerank import RerankRunner
 
 
 class DataPostProcessor:

api/core/rag/index_processor/index_processor_base.py

 from core.model_manager import ModelInstance
 from core.rag.extractor.entity.extract_setting import ExtractSetting
 from core.rag.models.document import Document
-from core.splitter.fixed_text_splitter import EnhanceRecursiveCharacterTextSplitter, FixedRecursiveCharacterTextSplitter
-from core.splitter.text_splitter import TextSplitter
+from core.rag.splitter.fixed_text_splitter import (
+    EnhanceRecursiveCharacterTextSplitter,
+    FixedRecursiveCharacterTextSplitter,
+)
+from core.rag.splitter.text_splitter import TextSplitter
 from models.dataset import Dataset, DatasetProcessRule
 
 

api/core/rag/retrieval/dataset_retrieval.py

 from core.model_runtime.model_providers.__base.large_language_model import LargeLanguageModel
 from core.rag.datasource.retrieval_service import RetrievalService
 from core.rag.models.document import Document
+from core.rag.rerank.rerank import RerankRunner
 from core.rag.retrieval.router.multi_dataset_function_call_router import FunctionCallMultiDatasetRouter
 from core.rag.retrieval.router.multi_dataset_react_route import ReactMultiDatasetRouter
-from core.rerank.rerank import RerankRunner
 from core.tools.tool.dataset_retriever.dataset_multi_retriever_tool import DatasetMultiRetrieverTool
 from core.tools.tool.dataset_retriever.dataset_retriever_base_tool import DatasetRetrieverBaseTool
 from core.tools.tool.dataset_retriever.dataset_retriever_tool import DatasetRetrieverTool

api/core/splitter/fixed_text_splitter.py → api/core/rag/splitter/fixed_text_splitter.py

 from core.model_manager import ModelInstance
 from core.model_runtime.model_providers.__base.text_embedding_model import TextEmbeddingModel
 from core.model_runtime.model_providers.__base.tokenizers.gpt2_tokenzier import GPT2Tokenizer
-from core.splitter.text_splitter import (
+from core.rag.splitter.text_splitter import (
     TS,
     Collection,
     Literal,

api/core/tools/tool/dataset_retriever/dataset_multi_retriever_tool.py

 from core.model_manager import ModelManager
 from core.model_runtime.entities.model_entities import ModelType
 from core.rag.datasource.retrieval_service import RetrievalService
-from core.rerank.rerank import RerankRunner
+from core.rag.rerank.rerank import RerankRunner
 from core.tools.tool.dataset_retriever.dataset_retriever_base_tool import DatasetRetrieverBaseTool
 from extensions.ext_database import db
 from models.dataset import Dataset, Document, DocumentSegment