spring-authorization-server Context 源码
spring-authorization-server Context 代码
文件路径：/oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/context/Context.java
/*
* Copyright 2020-2022 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.oauth2.server.authorization.context;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* A facility for holding information associated to a specific context.
*
* @author Joe Grandja
* @since 0.1.0
*/
public interface Context {
/**
* Returns the value of the attribute associated to the key.
*
* @param key the key for the attribute
* @param <V> the type of the value for the attribute
* @return the value of the attribute associated to the key, or {@code null} if not available
*/
@Nullable
<V> V get(Object key);
/**
* Returns the value of the attribute associated to the key.
*
* @param key the key for the attribute
* @param <V> the type of the value for the attribute
* @return the value of the attribute associated to the key, or {@code null} if not available or not of the specified type
*/
@Nullable
default <V> V get(Class<V> key) {
Assert.notNull(key, "key cannot be null");
V value = get((Object) key);
return key.isInstance(value) ? value : null;
}
/**
* Returns {@code true} if an attribute associated to the key exists, {@code false} otherwise.
*
* @param key the key for the attribute
* @return {@code true} if an attribute associated to the key exists, {@code false} otherwise
*/
boolean hasKey(Object key);
}
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