001/* 002 * Copyright 2002-2018 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.beans.factory.support; 018 019import java.security.AccessControlContext; 020import java.security.AccessController; 021 022import org.springframework.lang.Nullable; 023 024/** 025 * Simple {@link SecurityContextProvider} implementation. 026 * 027 * @author Costin Leau 028 * @since 3.0 029 */ 030public class SimpleSecurityContextProvider implements SecurityContextProvider { 031 032 @Nullable 033 private final AccessControlContext acc; 034 035 036 /** 037 * Construct a new {@code SimpleSecurityContextProvider} instance. 038 * <p>The security context will be retrieved on each call from the current 039 * thread. 040 */ 041 public SimpleSecurityContextProvider() { 042 this(null); 043 } 044 045 /** 046 * Construct a new {@code SimpleSecurityContextProvider} instance. 047 * <p>If the given control context is null, the security context will be 048 * retrieved on each call from the current thread. 049 * @param acc access control context (can be {@code null}) 050 * @see AccessController#getContext() 051 */ 052 public SimpleSecurityContextProvider(@Nullable AccessControlContext acc) { 053 this.acc = acc; 054 } 055 056 057 @Override 058 public AccessControlContext getAccessControlContext() { 059 return (this.acc != null ? this.acc : AccessController.getContext()); 060 } 061 062}