org.springframework.security.oauth2.server.authorization.web.DelegatingAuthenticationConverter Maven / Gradle / Ivy
/*
* Copyright 2020 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.web;
import org.springframework.lang.Nullable;
import org.springframework.security.core.Authentication;
import org.springframework.security.web.authentication.AuthenticationConverter;
import org.springframework.util.Assert;
import javax.servlet.http.HttpServletRequest;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.Objects;
/**
* An {@link AuthenticationConverter} that simply delegates to it's
* internal {@code List} of {@link AuthenticationConverter}(s).
*
* Each {@link AuthenticationConverter} is given a chance to
* {@link AuthenticationConverter#convert(HttpServletRequest)}
* with the first {@code non-null} {@link Authentication} being returned.
*
* @author Joe Grandja
* @since 0.0.2
* @see AuthenticationConverter
*/
public final class DelegatingAuthenticationConverter implements AuthenticationConverter {
private final List converters;
/**
* Constructs a {@code DelegatingAuthenticationConverter} using the provided parameters.
*
* @param converters a {@code List} of {@link AuthenticationConverter}(s)
*/
public DelegatingAuthenticationConverter(List converters) {
Assert.notEmpty(converters, "converters cannot be empty");
this.converters = Collections.unmodifiableList(new LinkedList<>(converters));
}
@Nullable
@Override
public Authentication convert(HttpServletRequest request) {
Assert.notNull(request, "request cannot be null");
// @formatter:off
return this.converters.stream()
.map(converter -> converter.convert(request))
.filter(Objects::nonNull)
.findFirst()
.orElse(null);
// @formatter:on
}
}