Add Ollama as a supported embedding provider (#1344)

embedchain/embedder/ollama.py

@@ -0,0 +1,19 @@
+from typing import Optional
+
+from langchain_community.embeddings import OllamaEmbeddings
+
+from embedchain.config import OllamaEmbedderConfig
+from embedchain.embedder.base import BaseEmbedder
+from embedchain.models import VectorDimensions
+
+
+class OllamaEmbedder(BaseEmbedder):
+    def __init__(self, config: Optional[OllamaEmbedderConfig] = None):
+        super().__init__(config=config)
+
+        embeddings = OllamaEmbeddings(model=self.config.model, base_url=self.config.base_url)
+        embedding_fn = BaseEmbedder._langchain_default_concept(embeddings)
+        self.set_embedding_fn(embedding_fn=embedding_fn)
+
+        vector_dimension = self.config.vector_dimension or VectorDimensions.OLLAMA.value
+        self.set_vector_dimension(vector_dimension=vector_dimension)