// *****************************************************************************
// Copyright (C) 2018 Red Hat, Inc. and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// http://www.eclipse.org/legal/epl-2.0.
//
// This Source Code may also be made available under the following Secondary
// Licenses when the conditions for such availability set forth in the Eclipse
// Public License v. 2.0 are satisfied: GNU General Public License, version 2
// with the GNU Classpath Exception which is available at
// https://www.gnu.org/software/classpath/license.html.
//
// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0
// *****************************************************************************

export interface Disposable {
    dispose(): void;
}

export function dispose<T extends Disposable>(disposable: T): T | undefined;
export function dispose<T extends Disposable>(...disposables: T[]): T[] | undefined;
export function dispose<T extends Disposable>(disposables: T[]): T[] | undefined;
export function dispose<T extends Disposable>(first: T | T[], ...rest: T[]): T | T[] | undefined {
    if (Array.isArray(first)) {
        first.forEach(d => d && d.dispose());
        return [];
    } else if (rest.length === 0) {
        if (first) {
            first.dispose();
            return first;
        }
        return undefined;
    } else {
        dispose(first);
        dispose(rest);
        return [];
    }
}