65 lines
2.3 KiB
Java
65 lines
2.3 KiB
Java
/*
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* Copyright 2020 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.security.oauth2.server.authorization.web;
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import org.springframework.security.core.Authentication;
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import org.springframework.security.web.authentication.AuthenticationConverter;
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import org.springframework.util.Assert;
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import javax.servlet.http.HttpServletRequest;
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import java.util.Collections;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Objects;
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/**
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* An {@link AuthenticationConverter} that simply delegates to it's
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* internal {@code List} of {@link AuthenticationConverter}(s).
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* <p>
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* Each {@link AuthenticationConverter} is given a chance to
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* {@link AuthenticationConverter#convert(HttpServletRequest)}
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* with the first {@code non-null} {@link Authentication} being returned.
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*
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* @author Joe Grandja
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* @since 0.0.2
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* @see AuthenticationConverter
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*/
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public final class DelegatingAuthenticationConverter implements AuthenticationConverter {
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private final List<AuthenticationConverter> converters;
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/**
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* Constructs a {@code DelegatingAuthenticationConverter} using the provided parameters.
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*
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* @param converters a {@code List} of {@link AuthenticationConverter}(s)
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*/
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public DelegatingAuthenticationConverter(List<AuthenticationConverter> converters) {
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Assert.notEmpty(converters, "converters cannot be empty");
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this.converters = Collections.unmodifiableList(new LinkedList<>(converters));
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}
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@Override
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public Authentication convert(HttpServletRequest request) {
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Assert.notNull(request, "request cannot be null");
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// @formatter:off
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return this.converters.stream()
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.map(converter -> converter.convert(request))
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.filter(Objects::nonNull)
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.findFirst()
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.orElse(null);
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// @formatter:on
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}
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}
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