/*
    * 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.apache.maven.artifact.handler.manager;
  
  import java.util.Map;
  import java.util.Set;
  import java.util.concurrent.ConcurrentHashMap;
  
  import org.apache.maven.artifact.handler.ArtifactHandler;
  import org.apache.maven.artifact.handler.DefaultArtifactHandler;
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.component.annotations.Requirement;
  
  /**
   * @author Jason van Zyl
   */
  @Component(role = ArtifactHandlerManager.class)
  public class DefaultArtifactHandlerManager implements ArtifactHandlerManager {
  
      @Requirement(role = ArtifactHandler.class)
      private Map<String, ArtifactHandler> artifactHandlers;
  
      private Map<String, ArtifactHandler> allHandlers = new ConcurrentHashMap<>();
  
      public ArtifactHandler getArtifactHandler(String type) {
          ArtifactHandler handler = allHandlers.get(type);
  
          if (handler == null) {
              handler = artifactHandlers.get(type);
  
              if (handler == null) {
                  handler = new DefaultArtifactHandler(type);
              } else {
                  allHandlers.put(type, handler);
              }
          }
  
          return handler;
      }
  
      public void addHandlers(Map<String, ArtifactHandler> handlers) {
          // legacy support for maven-gpg-plugin:1.0
          allHandlers.putAll(handlers);
      }
  
      @Deprecated
      public Set<String> getHandlerTypes() {
          return artifactHandlers.keySet();
      }
  }