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/**
 * 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 com.lyncode.jtwig.util;

import org.springframework.context.ApplicationContext;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.support.RequestContextUtils;

import javax.servlet.http.HttpServletRequest;

public class LocalThreadHolder {
    public static ApplicationContext getApplicationContext () {
        HttpServletRequest servletRequest = getServletRequest();
        if (servletRequest == null) return null;
        return RequestContextUtils.getWebApplicationContext(servletRequest);
    }

    public static HttpServletRequest getServletRequest () {
        RequestAttributes requestAttributes = RequestContextHolder.currentRequestAttributes();
        if (requestAttributes instanceof ServletRequestAttributes)
            return ((ServletRequestAttributes) requestAttributes).getRequest();
        else
            return null;
    }
}