/*
 * Copyright 2002-2016 the original author or authors.
 *
 * 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
 *
 *      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.springframework.security.web.context;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.context.SecurityContextHolderStrategy;

/**
 * @author Luke Taylor
 * @since 3.1
 */
public final class NullSecurityContextRepository implements SecurityContextRepository {

	private SecurityContextHolderStrategy securityContextHolderStrategy = SecurityContextHolder
			.getContextHolderStrategy();

	@Override
	public boolean containsContext(HttpServletRequest request) {
		return false;
	}

	@Override
	public SecurityContext loadContext(HttpRequestResponseHolder requestResponseHolder) {
		return this.securityContextHolderStrategy.createEmptyContext();
	}

	@Override
	public void saveContext(SecurityContext context, HttpServletRequest request, HttpServletResponse response) {
	}

	/**
	 * Sets the {@link SecurityContextHolderStrategy} to use. The default action is to use
	 * the {@link SecurityContextHolderStrategy} stored in {@link SecurityContextHolder}.
	 *
	 * @since 5.8
	 */
	public void setSecurityContextHolderStrategy(SecurityContextHolderStrategy strategy) {
		this.securityContextHolderStrategy = strategy;
	}

}

@@ -20,10 +20,10 @@
 2-20
-16
+22
  the
@@ -978,16 +978,56 @@
 trategy;
+%0Aimport org.springframework.util.Assert;
 %0A%0A/**%0A *
@@ -1870,16 +1870,16 @@
 .8%0A%09 */%0A
-
 %09public 
@@ -1958,16 +1958,118 @@
 tegy) %7B%0A
+%09%09Assert.notNull(this.securityContextHolderStrategy, %22securityContextHolderStrategy cannot be null%22);%0A
 %09%09this.s

Use SecurityContextHolderStrategy for NullSecurityContextRepository