1 package org.eclipse.aether.util.repository; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 import static java.util.Objects.requireNonNull; 23 24 import org.eclipse.aether.repository.Authentication; 25 import org.eclipse.aether.repository.AuthenticationSelector; 26 import org.eclipse.aether.repository.RemoteRepository; 27 28 /** 29 * An authentication selector that delegates to another selector but only if a repository has no authentication data 30 * yet. If authentication has already been assigned to a repository, that is selected. 31 */ 32 public final class ConservativeAuthenticationSelector 33 implements AuthenticationSelector 34 { 35 36 private final AuthenticationSelector selector; 37 38 /** 39 * Creates a new selector that delegates to the specified selector. 40 * 41 * @param selector The selector to delegate to in case a repository has no authentication yet, must not be 42 * {@code null}. 43 */ 44 public ConservativeAuthenticationSelector( AuthenticationSelector selector ) 45 { 46 this.selector = requireNonNull( selector, "authentication selector cannot be null" ); 47 } 48 49 public Authentication getAuthentication( RemoteRepository repository ) 50 { 51 requireNonNull( repository, "repository cannot be null" ); 52 Authentication auth = repository.getAuthentication(); 53 if ( auth != null ) 54 { 55 return auth; 56 } 57 return selector.getAuthentication( repository ); 58 } 59 60 }