/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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
    *
   *   http://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.eclipse.aether.util.repository;
  
  import java.util.Map;
  
  import org.eclipse.aether.repository.Authentication;
  import org.eclipse.aether.repository.AuthenticationContext;
  import org.eclipse.aether.repository.AuthenticationDigest;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Authentication block that manages a single authentication key and its component value. In this context, component
   * refers to an object whose behavior is solely dependent on its implementation class.
   */
  final class ComponentAuthentication implements Authentication {
  
      private final String key;
  
      private final Object value;
  
      ComponentAuthentication(String key, Object value) {
          this.key = requireNonNull(key, "authentication key cannot be null");
          if (key.length() == 0) {
              throw new IllegalArgumentException("authentication key cannot be empty");
          }
          this.value = value;
      }
  
      public void fill(AuthenticationContext context, String key, Map<String, String> data) {
          requireNonNull(context, "context cannot be null");
          context.put(this.key, value);
      }
  
      public void digest(AuthenticationDigest digest) {
          requireNonNull(digest, "digest cannot be null");
          if (value != null) {
              digest.update(key, value.getClass().getName());
          }
      }
  
      @Override
      public boolean equals(Object obj) {
          if (this == obj) {
              return true;
          }
          if (obj == null || !getClass().equals(obj.getClass())) {
              return false;
          }
          ComponentAuthentication that = (ComponentAuthentication) obj;
          return key.equals(that.key) && eqClass(value, that.value);
      }
  
      private static <T> boolean eqClass(T s1, T s2) {
          return (s1 == null) ? s2 == null : s2 != null && s1.getClass().equals(s2.getClass());
      }
  
      @Override
      public int hashCode() {
          int hash = 17;
          hash = hash * 31 + key.hashCode();
          hash = hash * 31 + ((value != null) ? value.getClass().hashCode() : 0);
          return hash;
      }
  
      @Override
      public String toString() {
          return key + "=" + value;
      }
  }