70 lines
2.4 KiB
Python
70 lines
2.4 KiB
Python
import os
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from haiku.rag.config import AppConfig, Config
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from haiku.rag.reranking.base import RerankerBase
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def get_reranker(config: AppConfig = Config) -> RerankerBase | None:
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"""
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Factory function to get the appropriate reranker based on the configuration.
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Returns None if reranking is disabled.
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Args:
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config: Configuration to use. Defaults to global Config.
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Returns:
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A reranker instance if configured, None otherwise.
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"""
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if config.reranking.model and config.reranking.model.provider == "mxbai":
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try:
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from haiku.rag.reranking.mxbai import MxBAIReranker
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os.environ["TOKENIZERS_PARALLELISM"] = "true"
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return MxBAIReranker()
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except ImportError: # pragma: no cover
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return None
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if config.reranking.model and config.reranking.model.provider == "cohere":
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try:
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from haiku.rag.reranking.cohere import CohereReranker
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return CohereReranker()
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except ImportError: # pragma: no cover
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return None
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if config.reranking.model and config.reranking.model.provider == "vllm":
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try:
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from haiku.rag.reranking.vllm import VLLMReranker
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base_url = config.reranking.model.base_url
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if not base_url:
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raise ValueError("vLLM reranker requires base_url in reranking.model")
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return VLLMReranker(config.reranking.model.name, base_url)
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except ImportError: # pragma: no cover
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return None
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if config.reranking.model and config.reranking.model.provider == "zeroentropy":
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try:
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from haiku.rag.reranking.zeroentropy import ZeroEntropyReranker
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model = config.reranking.model.name or "zerank-1"
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return ZeroEntropyReranker(model)
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except ImportError: # pragma: no cover
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return None
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if config.reranking.model and config.reranking.model.provider == "jina":
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from haiku.rag.reranking.jina import JinaReranker
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model = config.reranking.model.name or "jina-reranker-v3"
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return JinaReranker(model)
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if config.reranking.model and config.reranking.model.provider == "jina-local":
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try:
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from haiku.rag.reranking.jina_local import JinaLocalReranker
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model = config.reranking.model.name or "jinaai/jina-reranker-v3"
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return JinaLocalReranker(model)
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except ImportError: # pragma: no cover
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return None
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return None
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