package org.eclipse.aether.util.filter;
   
   /*
    * 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.
   */
  
  import java.util.Collection;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  
  import org.eclipse.aether.graph.Dependency;
  import org.eclipse.aether.graph.DependencyFilter;
  import org.eclipse.aether.graph.DependencyNode;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * A simple filter to exclude artifacts based on either artifact id or group id and artifact id.
   */
  public final class ExclusionsDependencyFilter
      implements DependencyFilter
  {
  
      private final Set<String> excludes = new HashSet<>();
  
      /**
       * Creates a new filter using the specified exclude patterns. A pattern can either be of the form
       * {@code groupId:artifactId} (recommended) or just {@code artifactId} (deprecated).
       * 
       * @param excludes The exclude patterns, may be {@code null} or empty to exclude no artifacts.
       */
      public ExclusionsDependencyFilter( Collection<String> excludes )
      {
          if ( excludes != null )
          {
              this.excludes.addAll( excludes );
          }
      }
  
      public boolean accept( DependencyNode node, List<DependencyNode> parents )
      {
          requireNonNull( node, "node cannot be null" );
          requireNonNull( parents, "parents cannot be null" );
          Dependency dependency = node.getDependency();
  
          if ( dependency == null )
          {
              return true;
          }
  
          String id = dependency.getArtifact().getArtifactId();
  
          if ( excludes.contains( id ) )
          {
              return false;
          }
  
          id = dependency.getArtifact().getGroupId() + ':' + id;
  
          if ( excludes.contains( id ) )
          {
              return false;
          }
  
          return true;
      }
  
      @Override
      public boolean equals( Object obj )
      {
          if ( this == obj )
          {
              return true;
          }
  
          if ( obj == null || !getClass().equals( obj.getClass() ) )
          {
              return false;
          }
  
          ExclusionsDependencyFilter that = (ExclusionsDependencyFilter) obj;
  
          return this.excludes.equals( that.excludes );
     }
 
     @Override
     public int hashCode()
     {
         int hash = 17;
         hash = hash * 31 + excludes.hashCode();
         return hash;
     }
 
 }