/**
 * Copyright (c) 2020-present, Goldman Sachs
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { type Hashable } from '@finos/legend-shared';
import type { Store } from '../store/Store.js';
import type { JsonModelConnection } from '../store/modelToModel/connection/JsonModelConnection.js';
import type { XmlModelConnection } from '../store/modelToModel/connection/XmlModelConnection.js';
import type { FlatDataConnection } from '../store/flatData/connection/FlatDataConnection.js';
import type { PackageableConnection } from './PackageableConnection.js';
import type { RelationalDatabaseConnection } from '../store/relational/connection/RelationalDatabaseConnection.js';
import type { PackageableElementReference } from '../PackageableElementReference.js';
import type { ModelChainConnection } from '../store/modelToModel/connection/ModelChainConnection.js';
import type { INTERNAL__UnknownConnection } from './INTERNAL__UnknownConnection.js';
export interface ConnectionVisitor<T> {
    visit_Connection(connection: Connection): T;
    visit_INTERNAL__UnknownConnection(connection: INTERNAL__UnknownConnection): T;
    visit_ConnectionPointer(connection: ConnectionPointer): T;
    visit_ModelChainConnection(connection: ModelChainConnection): T;
    visit_JsonModelConnection(connection: JsonModelConnection): T;
    visit_XmlModelConnection(connection: XmlModelConnection): T;
    visit_FlatDataConnection(connection: FlatDataConnection): T;
    visit_RelationalDatabaseConnection(connection: RelationalDatabaseConnection): T;
}
export declare abstract class Connection implements Hashable {
    readonly _UUID: string;
    /**
     * NOTE: in Pure right now, this is of type Any[1], but technically it should be a store
     */
    store: PackageableElementReference<Store> | undefined;
    constructor(store: PackageableElementReference<Store> | undefined);
    abstract get hashCode(): string;
    abstract accept_ConnectionVisitor<T>(visitor: ConnectionVisitor<T>): T;
}
export declare class ConnectionPointer extends Connection implements Hashable {
    packageableConnection: PackageableElementReference<PackageableConnection>;
    constructor(packageableConnection: PackageableElementReference<PackageableConnection>);
    get hashCode(): string;
    accept_ConnectionVisitor<T>(visitor: ConnectionVisitor<T>): T;
}
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