/*
    * 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.graph.version;
  
  import java.util.Iterator;
  import java.util.Objects;
  import java.util.function.Predicate;
  
  import org.eclipse.aether.artifact.Artifact;
  import org.eclipse.aether.collection.DependencyCollectionContext;
  import org.eclipse.aether.collection.VersionFilter;
  import org.eclipse.aether.version.Version;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * A version filter that excludes any version that is blacklisted.
   *
   * @since 2.0.0
   */
  public final class PredicateVersionFilter implements VersionFilter {
      private final Predicate<Artifact> artifactPredicate;
  
      /**
       * Creates a new instance of this version filter.
       */
      public PredicateVersionFilter(Predicate<Artifact> artifactPredicate) {
          this.artifactPredicate = requireNonNull(artifactPredicate);
      }
  
      @Override
      public void filterVersions(VersionFilterContext context) {
          Artifact dependencyArtifact = context.getDependency().getArtifact();
          Iterator<Version> it = context.iterator();
          while (it.hasNext()) {
              Version version = it.next();
              if (!artifactPredicate.test(dependencyArtifact.setVersion(version.toString()))) {
                  it.remove();
              }
          }
      }
  
      @Override
      public VersionFilter deriveChildFilter(DependencyCollectionContext context) {
          return this;
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) {
              return true;
          }
          if (o == null || getClass() != o.getClass()) {
              return false;
          }
          PredicateVersionFilter that = (PredicateVersionFilter) o;
          return Objects.equals(artifactPredicate, that.artifactPredicate);
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(artifactPredicate);
      }
  }