/**
 * @module @nhtio/adk/batteries/vector/solr
 *
 * Apache Solr adapter (dense vector / kNN query parser, Solr 9+). A logical collection maps to a
 * Solr core; the adapter ensures a `DenseVectorField` (`vec`) plus `document`/`metadata` string
 * fields exist in the core schema, then uses the `{!knn f=vec topK=N}[...]` parser for search.
 * Score is Solr's cosine similarity ([0,1]). Metadata is a JSON string field filtered with the
 * neutral filter tree's JS reference evaluator for cross-adapter parity.
 *
 * No typed driver — Solr is plain HTTP/JSON, so this uses `fetch` (zero extra dependency). The
 * target core must already exist (e.g. `solr-precreate <core>` / the Core Admin API); the adapter
 * does not create cores at runtime, only their schema fields. `collection` is the core name.
 */
import { BaseVectorStore } from "../contract";
import type { SearchPlan, UpsertPlan, DeletePlan, CollectionSpec } from "../plan";
import type { VectorMatch, VectorStoreCapabilities, BaseVectorStoreOptions } from "../types";
export interface SolrVectorStoreOptions extends BaseVectorStoreOptions {
    /** Connection and authentication parameters for the backend. */
    connection: {
        url: string;
    };
}
export declare class SolrVectorStore extends BaseVectorStore {
    #private;
    readonly capabilities: VectorStoreCapabilities;
    /** Static availability probe: whether this adapter's runtime driver can load in the current environment. */
    static isAvailable(): boolean;
    isAvailable(): boolean;
    connect(): Promise<void>;
    close(): Promise<void>;
    createCollection(spec: CollectionSpec, _ifNotExists: boolean): Promise<void>;
    dropCollection(collection: string, _ifExists: boolean): Promise<void>;
    hasCollection(collection: string): Promise<boolean>;
    renameCollection(_from: string, _to: string): Promise<void>;
    executeUpsert(plan: UpsertPlan): Promise<void>;
    executeSearch(plan: SearchPlan): Promise<VectorMatch[]>;
    executeDelete(plan: DeletePlan): Promise<void>;
}