spring-authorization-server DelegatingOAuth2TokenGenerator 源码
spring-authorization-server DelegatingOAuth2TokenGenerator 代码
文件路径：/oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/token/DelegatingOAuth2TokenGenerator.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.token;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.springframework.lang.Nullable;
import org.springframework.security.oauth2.core.OAuth2Token;
import org.springframework.util.Assert;
/**
* An {@link OAuth2TokenGenerator} that simply delegates to it's
* internal {@code List} of {@link OAuth2TokenGenerator}(s).
* <p>
* Each {@link OAuth2TokenGenerator} is given a chance to
* {@link OAuth2TokenGenerator#generate(OAuth2TokenContext)}
* with the first {@code non-null} {@link OAuth2Token} being returned.
*
* @author Joe Grandja
* @since 0.2.3
* @see OAuth2TokenGenerator
* @see JwtGenerator
* @see OAuth2RefreshTokenGenerator
*/
public final class DelegatingOAuth2TokenGenerator implements OAuth2TokenGenerator<OAuth2Token> {
private final List<OAuth2TokenGenerator<OAuth2Token>> tokenGenerators;
/**
* Constructs a {@code DelegatingOAuth2TokenGenerator} using the provided parameters.
*
* @param tokenGenerators an array of {@link OAuth2TokenGenerator}(s)
*/
@SafeVarargs
public DelegatingOAuth2TokenGenerator(OAuth2TokenGenerator<? extends OAuth2Token>... tokenGenerators) {
Assert.notEmpty(tokenGenerators, "tokenGenerators cannot be empty");
Assert.noNullElements(tokenGenerators, "tokenGenerator cannot be null");
this.tokenGenerators = Collections.unmodifiableList(asList(tokenGenerators));
}
@Nullable
@Override
public OAuth2Token generate(OAuth2TokenContext context) {
for (OAuth2TokenGenerator<OAuth2Token> tokenGenerator : this.tokenGenerators) {
OAuth2Token token = tokenGenerator.generate(context);
if (token != null) {
return token;
}
}
return null;
}
@SuppressWarnings("unchecked")
private static List<OAuth2TokenGenerator<OAuth2Token>> asList(
OAuth2TokenGenerator<? extends OAuth2Token>... tokenGenerators) {
List<OAuth2TokenGenerator<OAuth2Token>> tokenGeneratorList = new ArrayList<>();
for (OAuth2TokenGenerator<? extends OAuth2Token> tokenGenerator : tokenGenerators) {
tokenGeneratorList.add((OAuth2TokenGenerator<OAuth2Token>) tokenGenerator);
}
return tokenGeneratorList;
}
}
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spring-authorization-server 源码目录
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