/*
    * 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;
  
  import javax.inject.Inject;
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.util.LinkedHashSet;
  import java.util.List;
  import java.util.Set;
  
  import org.apache.maven.artifact.resolver.filter.ArtifactFilter;
  import org.apache.maven.artifact.resolver.filter.ExclusionSetFilter;
  import org.apache.maven.extension.internal.CoreExports;
  
  /**
   * @author Jason van Zyl
   */
  @Named
  @Singleton
  @SuppressWarnings("deprecation")
  public class DefaultArtifactFilterManager implements ArtifactFilterManager {
  
      // this is a live injected collection
      protected final List<ArtifactFilterManagerDelegate> delegates;
  
      protected Set<String> excludedArtifacts;
  
      private final Set<String> coreArtifacts;
  
      @Inject
      public DefaultArtifactFilterManager(List<ArtifactFilterManagerDelegate> delegates, CoreExports coreExports) {
          this.delegates = delegates;
          this.coreArtifacts = coreExports.getExportedArtifacts();
      }
  
      private synchronized Set<String> getExcludedArtifacts() {
          if (excludedArtifacts == null) {
              excludedArtifacts = new LinkedHashSet<>(coreArtifacts);
          }
          return excludedArtifacts;
      }
  
      /**
       * Returns the artifact filter for the core + extension artifacts.
       *
       * @see org.apache.maven.ArtifactFilterManager#getArtifactFilter()
       */
      public ArtifactFilter getArtifactFilter() {
          Set<String> excludes = new LinkedHashSet<>(getExcludedArtifacts());
  
          for (ArtifactFilterManagerDelegate delegate : delegates) {
              delegate.addExcludes(excludes);
          }
  
          return new ExclusionSetFilter(excludes);
      }
  
      /**
       * Returns the artifact filter for the standard core artifacts.
       *
       * @see org.apache.maven.ArtifactFilterManager#getCoreArtifactFilter()
       */
      public ArtifactFilter getCoreArtifactFilter() {
          return new ExclusionSetFilter(getCoreArtifactExcludes());
      }
  
      public void excludeArtifact(String artifactId) {
          getExcludedArtifacts().add(artifactId);
      }
  
      public Set<String> getCoreArtifactExcludes() {
          Set<String> excludes = new LinkedHashSet<>(coreArtifacts);
  
          for (ArtifactFilterManagerDelegate delegate : delegates) {
              delegate.addCoreExcludes(excludes);
          }
  
          return excludes;
      }
  }