export interface AgentConfigurationKey {
    required: boolean;
    type: 'number' | 'string' | 'boolean';
}
export interface AgentConfigurationProvider {
    getAllKeyValues(callback: (err: Error, keysAndValues: {
        [key: string]: string;
    }) => void): void;
    getName(): string;
}
export declare class JsonObjectConfigurationProvider implements AgentConfigurationProvider {
    protected configObject: Record<string, any>;
    constructor(configObject: Record<string, any>);
    getAllKeyValues(callback: (err: Error, keysAndValues: {
        [key: string]: string;
    }) => void): void;
    getName(): string;
}
export declare class EnvVariableConfigurationProvider implements AgentConfigurationProvider {
    private prefix?;
    constructor(prefix?: string);
    getAllKeyValues(callback: (err: Error, keysAndValues: {
        [key: string]: string;
    }) => void): void;
    getName(): string;
}
export declare class ConfigProviderAggregator implements AgentConfigurationProvider {
    private providers;
    constructor(providers: AgentConfigurationProvider[]);
    getAllKeyValues(callback: (err: Error, keysAndValues: {
        [key: string]: string;
    }) => void): void;
    getName(): string;
}
export declare class JsonConfigFileConfigurationProvider implements AgentConfigurationProvider {
    private filename;
    constructor(filename: string);
    getAllKeyValues(callback: (err: Error, keysAndValues: {
        [key: string]: string;
    }) => void): void;
    getName(): string;
}
export declare abstract class AgentConfigKey<T> {
    metadata: AgentConfigurationKey;
    abstract loadFromRawData(s: string): any;
    hasValue: boolean;
    isConfigKey: true;
    value: T;
}
export declare class StringConfigKey implements AgentConfigKey<string> {
    private required;
    constructor(required: boolean, defaultValue?: string);
    isConfigKey: true;
    readonly metadata: AgentConfigurationKey;
    private _value;
    get value(): string;
    set value(value: string);
    hasValue: boolean;
    loadFromRawData(s: string): void;
}
export declare class NumberConfigKey implements AgentConfigKey<number> {
    private required;
    constructor(required: boolean, defaultValue?: number);
    isConfigKey: true;
    readonly metadata: AgentConfigurationKey;
    private _value;
    get value(): number;
    set value(value: number);
    hasValue: boolean;
    loadFromRawData(s: string): void;
}
export declare class BooleanConfigKey implements AgentConfigKey<boolean> {
    private required;
    constructor(required: boolean, defaultValue?: boolean);
    isConfigKey: true;
    readonly metadata: AgentConfigurationKey;
    private _value;
    get value(): boolean;
    set value(value: boolean);
    hasValue: boolean;
    loadFromRawData(s: string): void;
}
export declare class BaseConfiguration {
    loadConfigurationFromMultipleProviders(configProviders: AgentConfigurationProvider[], callback: (err: Error) => void): void;
    loadConfiguration(configProvider: AgentConfigurationProvider, callback?: (err: Error) => void, dbg?: boolean): void;
    toJsonObject(): Record<string, any>;
    getLowerCaseToKeyMap(): {};
}