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/*
 * Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * 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 WITH Classpath-exception-2.0
 */

package com.sun.faces.application.applicationimpl.events;

import static com.sun.faces.util.Util.coalesce;

import com.sun.faces.util.Cache;

import jakarta.faces.event.SystemEvent;

/**
 * Simple wrapper class for application level SystemEvents. It provides the structure to map a single SystemEvent to
 * multiple sources which are represented by SourceInfo instances.
 */
public class SystemEventInfo {

    private Class systemEvent;
    private final Cache, EventInfo> cache = new Cache<>(arg -> new EventInfo(systemEvent, arg));

    // -------------------------------------------------------- Constructors

    public SystemEventInfo(Class systemEvent) {
        this.systemEvent = systemEvent;
    }

    // ------------------------------------------------------ Public Methods

    public EventInfo getEventInfo(Class source) {
        return cache.get(coalesce(source, Void.class));
    }

}