/*
 * Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.truffle.tools.chromeinspector.domains;

import com.oracle.truffle.tools.chromeinspector.events.EventHandler;

public abstract class Domain {

    protected EventHandler eventHandler;
    private boolean enabled;

    protected Domain() {
    }

    public final void setEventHandler(EventHandler eventHandler) {
        this.eventHandler = eventHandler;
    }

    protected abstract void doEnable();

    protected abstract void doDisable();

    protected void notifyDisabled() {
    }

    public final void enable() {
        if (!enabled) {
            enabled = true;
            doEnable();
        }
    }

    public final void disable() {
        if (enabled) {
            enabled = false;
            doDisable();
        }
        notifyDisabled();
    }

    public final boolean isEnabled() {
        return enabled;
    }
}