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}