Would it be possible to define these embed methods in the parent class?

added these methods to the parent class, needed to add them as abstract methods to the base interface, forcing all embedding model implementations to support them. what do you think?

It would be fine not to declare it as an abstract method, since most implementing classes may not need to modify the implementation of these methods.

Maybe we could add an additional parameter Map<String, Object> parameters here, like chat method of BaseChatModelConnection.

/**
 * Generate embeddings for a single text input.
 *
 * @param text The input text to generate embeddings for
 * @param parameters The additional arguments to configure the embed request.
 * @return An array of floating-point values representing the text embeddings
 */
public abstract float[] embed(String text, Map<String, Object> parameters);

Then we can remove the embed(String text, String model) and get model name from parameters.

I recommend this implementation because, in our design, different instances of EmbeddingModelSetup can be initialized with different configuration parameters, yet they can share the same EmbeddingModelConnection. When an EmbeddingModelSetup instance calls the embed method of EmbeddingModelConnection, it can pass its own unique configuration parameters, including model_name, encoding_format, and others.

You can take a look at python implementation as a reference.

Makes sense. I did a refactor to include the approach and now it's more aligned with BaseChatModelConnection.