/**
 * ```ts
 * import type { Analyzer } from "arangojs/analyzer";
 * ```
 *
 * The "analyzer" module provides analyzer related types and interfaces
 * for TypeScript.
 *
 * @packageDocumentation
 */
import { ArangoResponseMetadata } from "./connection";
import { Database } from "./database";
/**
 * Indicates whether the given value represents an {@link Analyzer}.
 *
 * @param analyzer - A value that might be an Analyzer.
 */
export declare function isArangoAnalyzer(analyzer: any): analyzer is Analyzer;
/**
 * Name of a feature enabled for an Analyzer.
 */
export declare type AnalyzerFeature = "frequency" | "norm" | "position";
/**
 * An object describing an Analyzer.
 */
export declare type AnalyzerDescription = AnalyzerInfo & {
    name: string;
    features: AnalyzerFeature[];
};
/**
 * Options for creating an Analyzer.
 */
export declare type CreateAnalyzerOptions = AnalyzerInfo & {
    /**
     * Features to enable for this Analyzer.
     */
    features?: AnalyzerFeature[];
};
/**
 * Analyzer type and its type-specific properties.
 */
export declare type AnalyzerInfo = IdentityAnalyzerInfo | DelimiterAnalyzerInfo | StemAnalyzerInfo | NormAnalyzerInfo | NgramAnalyzerInfo | TextAnalyzerInfo | PipelineAnalyzer | AqlAnalyzer | GeoJsonAnalyzer | GeoPointAnalyzer | StopwordsAnalyzer;
/**
 * Analyzer type and type-specific properties for an Identity Analyzer.
 */
export declare type IdentityAnalyzerInfo = {
    /**
     * Type of the Analyzer.
     */
    type: "identity";
    /**
     * Additional properties for the Analyzer.
     *
     * The `identity` Analyzer does not take additional properties.
     */
    properties?: null;
};
/**
 * Analyzer type and type-specific properties for a Delimiter Analyzer.
 */
export declare type DelimiterAnalyzerInfo = {
    /**
     * Type of the Analyzer.
     */
    type: "delimiter";
    /**
     * Additional properties for the Analyzer.
     *
     * The value will be used as delimiter to split text into tokens as specified
     * in RFC 4180, without starting new records on newlines.
     */
    properties: string | {
        delimiter: string;
    };
};
/**
 * Analyzer type and type-specific properties for a Stem Analyzer.
 */
export declare type StemAnalyzerInfo = {
    /**
     * Type of the Analyzer.
     */
    type: "stem";
    /**
     * Additional properties for the Analyzer.
     *
     * The value defines the text locale.
     *
     * Format: `language[_COUNTRY][.encoding][@variant]`
     */
    properties: {
        locale: string;
    };
};
/**
 * Properties of a Norm Analyzer.
 */
export declare type NormAnalyzerProperties = {
    /**
     * Text locale.
     *
     * Format: `language[_COUNTRY][.encoding][@variant]`
     */
    locale: string;
    /**
     * Case conversion.
     *
     * Default: `"lower"`
     */
    case?: "lower" | "none" | "upper";
    /**
     * Preserve accents in returned words.
     *
     * Default: `false`
     */
    accent?: boolean;
};
/**
 * Analyzer type and type-specific properties for a Norm Analyzer.
 */
export declare type NormAnalyzerInfo = {
    /**
     * Type of the Analyzer.
     */
    type: "norm";
    /**
     * Additional properties for the Analyzer.
     */
    properties: NormAnalyzerProperties;
};
/**
 * Properties of an Ngram Analyzer.
 */
export declare type NgramAnalyzerProperties = {
    /**
     * Maximum n-gram length.
     */
    max: number;
    /**
     * Minimum n-gram length.
     */
    min: number;
    /**
     * Output the original value as well.
     */
    preserveOriginal: boolean;
};
/**
 * Analyzer type and type-specific properties for an Ngram Analyzer.
 */
export declare type NgramAnalyzerInfo = {
    /**
     * Type of the Analyzer.
     */
    type: "ngram";
    /**
     * Additional properties for the Analyzer.
     */
    properties: NgramAnalyzerProperties;
};
/**
 * Properties of a Text Analyzer.
 */
export declare type TextAnalyzerProperties = {
    /**
     * Text locale.
     *
     * Format: `language[_COUNTRY][.encoding][@variant]`
     */
    locale: string;
    /**
     * Case conversion.
     *
     * Default: `"lower"`
     */
    case?: "lower" | "none" | "upper";
    /**
     * Words to omit from result.
     *
     * Defaults to the words loaded from the file at `stopwordsPath`.
     */
    stopwords?: string[];
    /**
     * Path with a `language` sub-directory containing files with words to omit.
     *
     * Defaults to the path specified in the server-side environment variable
     * `IRESEARCH_TEXT_STOPWORD_PATH` or the current working directory of the
     * ArangoDB process.
     */
    stopwordsPath?: string;
    /**
     * Preserve accents in returned words.
     *
     * Default: `false`
     */
    accent?: boolean;
    /**
     * Apply stemming on returned words.
     *
     * Default: `true`
     */
    stemming?: boolean;
    /**
     * If present, then edge n-grams are generated for each token (word).
     */
    edgeNgram?: {
        min?: number;
        max?: number;
        preserveOriginal?: boolean;
    };
};
/**
 * Analyzer type and type-specific properties for a Text Analyzer.
 */
export declare type TextAnalyzerInfo = {
    /**
     * Type of the Analyzer.
     */
    type: "text";
    /**
     * Additional properties for the Analyzer.
     */
    properties: TextAnalyzerProperties;
};
/**
 * Properties of a Pipeline Analyzer.
 */
export declare type PipelineAnalyzerProperties = {
    /**
     * Definitions for Analyzers to chain in this Pipeline Analyzer.
     */
    pipeline: AnalyzerInfo[];
};
/**
 * Analyzer type and type-specific properties for a Pipeline Analyzer
 */
export declare type PipelineAnalyzer = {
    /**
     * Type of the Analyzer.
     */
    type: "pipeline";
    /**
     * Additional properties for the Analyzer.
     */
    properties: PipelineAnalyzerProperties;
};
/**
 * Properties of an AQL Analyzer.
 */
export declare type AqlAnalyzerProperties = {
    /**
     * AQL query to be executed.
     */
    queryString: string;
    /**
     * If set to `true`, the position is set to `0` for all members of the query result array.
     *
     * Default: `false`
     */
    collapsePositions?: boolean;
    /**
     * If set to `false`, `null` values will be discarded from the View index.
     *
     * Default: `true`
     */
    keepNull?: boolean;
    /**
     * Number between `1` and `1000` that determines the batch size for reading
     * data from the query.
     *
     * Default: `1`
     */
    batchSize?: number;
    /**
     * Memory limit for query execution in bytes.
     *
     * Default: `1048576` (1 MiB)
     */
    memoryLimit?: number;
    /**
     * Data type of the returned tokens.
     *
     * Default: `"string"`
     */
    returnType?: "string" | "number" | "bool";
};
/**
 * Analyzer type and type-specific properties for an AQL Analyzer
 */
export declare type AqlAnalyzer = {
    /**
     * Type of the Analyzer.
     */
    type: "aql";
    /**
     * Additional properties for the Analyzer.
     */
    properties: AqlAnalyzerProperties;
};
/**
 * Properties of a GeoJSON Analyzer.
 */
export declare type GeoJsonAnalyzerProperties = {
    /**
     * If set to `"centroid"`, only the centroid of the input geometry will be
     * computed and indexed.
     *
     * If set to `"point"` only GeoJSON objects of type Point will be indexed and
     * all other geometry types will be ignored.
     *
     * Default: `"shape"`
     */
    type?: "shape" | "centroid" | "point";
    /**
     * Options for fine-tuning geo queries.
     *
     * Default: `{ maxCells: 20, minLevel: 4, maxLevel: 23 }`
     */
    options?: {
        maxCells?: number;
        minLevel?: number;
        maxLevel?: number;
    };
};
/**
 * Analyzer type and type-specific properties for a GeoJSON Analyzer
 */
export declare type GeoJsonAnalyzer = {
    /**
     * Type of the Analyzer.
     */
    type: "geojson";
    /**
     * Additional properties for the Analyzer.
     */
    properties: GeoJsonAnalyzerProperties;
};
/**
 * Properties of a GeoPoint Analyzer.
 */
export declare type GeoPointAnalyzerProperties = {
    /**
     * Attribute paths of the latitude value relative to the field for which the
     * Analyzer is defined in the View.
     */
    latitude?: string[];
    /**
     * Attribute paths of the longitude value relative to the field for which the
     * Analyzer is defined in the View.
     */
    longitude?: string[];
    /**
     * Options for fine-tuning geo queries.
     *
     * Default: `{ maxCells: 20, minLevel: 4, maxLevel: 23 }`
     */
    options?: {
        minCells?: number;
        minLevel?: number;
        maxLevel?: number;
    };
};
/**
 * Analyzer type and type-specific properties for a GeoPoint Analyzer
 */
export declare type GeoPointAnalyzer = {
    /**
     * Type of the Analyzer.
     */
    type: "geopoint";
    /**
     * Additional properties for the Analyzer.
     */
    properties: GeoPointAnalyzerProperties;
};
/**
 * Properties of a Stopwords Analyzer.
 */
export declare type StopwordsAnalyzerProperties = {
    /**
     * Hex-encoded strings that describe the tokens to be discarded.
     */
    stopwords: string[];
};
/**
 * Analyzer type and type-specific properties for a Stopwords Analyzer
 */
export declare type StopwordsAnalyzer = {
    /**
     * Type of the Analyzer.
     */
    type: "stopwords";
    /**
     * Additional properties for the Analyzer.
     */
    properties: StopwordsAnalyzerProperties;
};
/**
 * Represents an Analyzer in a {@link Database}.
 */
export declare class Analyzer {
    protected _name: string;
    protected _db: Database;
    /**
     * @internal
     * @hidden
     */
    constructor(db: Database, name: string);
    /**
     * @internal
     *
     * Indicates that this object represents an ArangoDB Analyzer.
     */
    get isArangoAnalyzer(): true;
    /**
     * Name of this Analyzer.
     *
     * See also {@link Database.analyzer}.
     */
    get name(): string;
    /**
     * Checks whether the Analyzer exists.
     *
     * @example
     * ```js
     * const db = new Database();
     * const analyzer = db.analyzer("some-analyzer");
     * const result = await analyzer.exists();
     * // result indicates whether the Analyzer exists
     * ```
     */
    exists(): Promise<boolean>;
    /**
     * Retrieves the Analyzer definition for the Analyzer.
     *
     * @example
     * ```js
     * const db = new Database();
     * const analyzer = db.analyzer("some-analyzer");
     * const definition = await analyzer.get();
     * // definition contains the Analyzer definition
     * ```
     */
    get(): Promise<ArangoResponseMetadata & AnalyzerDescription>;
    /**
     * Creates a new Analyzer with the given `options` and the instance's name.
     *
     * See also {@link Database.createAnalyzer}.
     *
     * @param options - Options for creating the Analyzer.
     *
     * @example
     * ```js
     * const db = new Database();
     * const analyzer = db.analyzer("potatoes");
     * await analyzer.create({ type: "identity" });
     * // the identity Analyzer "potatoes" now exists
     * ```
     */
    create(options: CreateAnalyzerOptions): Promise<AnalyzerDescription>;
    /**
     * Deletes the Analyzer from the database.
     *
     * @param force - Whether the Analyzer should still be deleted even if it
     * is currently in use.
     *
     * @example
     * ```js
     * const db = new Database();
     * const analyzer = db.analyzer("some-analyzer");
     * await analyzer.drop();
     * // the Analyzer "some-analyzer" no longer exists
     * ```
     */
    drop(force?: boolean): Promise<ArangoResponseMetadata & {
        name: string;
    }>;
}
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