/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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
 *
 *    https://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.grails.web.servlet;

import jakarta.servlet.http.HttpServletResponse;

import org.grails.core.lifecycle.ShutdownOperations;

/**
 * A holder for the original Wrapped response for use when using includes.
 *
 * @author Graeme Rocher
 * @since 0.5
 */
public class WrappedResponseHolder {

    static {
        ShutdownOperations.addOperation(new Runnable() {
            public void run() {
                wrappedResponseHolder = new ThreadLocal<>();
            }
        }, true);
    }

    private static ThreadLocal<HttpServletResponse> wrappedResponseHolder =
            new ThreadLocal<>();

    /**
     * Bind the given HttpServletResponse to the current thread.
     * @param response the HttpServletResponse to expose
     */
    public static void setWrappedResponse(HttpServletResponse response) {
        WrappedResponseHolder.wrappedResponseHolder.set(response);
    }

    /**
     * Return the HttpServletResponse currently bound to the thread.
     * @return the HttpServletResponse currently bound to the thread, or <code>null</code>
     */
    public static HttpServletResponse getWrappedResponse() {
        return wrappedResponseHolder.get();
    }
}
