/*
 * Zed Attack Proxy (ZAP) and its related class files.
 *
 * ZAP is an HTTP/HTTPS proxy for assessing web application security.
 *
 * Copyright 2012 The ZAP Development Team
 *
 * 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.
 */
package org.zaproxy.zap.extension.httppanel.view;

import org.zaproxy.zap.extension.httppanel.Message;

public class ImmutableHttpPanelViewModel implements HttpPanelViewModel {

    private static ImmutableHttpPanelViewModel instance;

    public static ImmutableHttpPanelViewModel getInstance() {
        if (instance == null) {
            createInstance();
        }
        return instance;
    }

    private static synchronized void createInstance() {
        if (instance == null) {
            instance = new ImmutableHttpPanelViewModel();
        }
    }

    @Override
    public void setMessage(Message aMessage) {}

    @Override
    public Message getMessage() {
        return null;
    }

    @Override
    public void clear() {}

    @Override
    public void addHttpPanelViewModelListener(HttpPanelViewModelListener l) {}

    @Override
    public void removeHttpPanelViewModelListener(HttpPanelViewModelListener l) {}
}
