/*
    * 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.internal.impl.synccontext.named;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  
  import org.eclipse.aether.RepositorySystemSession;
  import org.eclipse.aether.artifact.Artifact;
  import org.eclipse.aether.metadata.Metadata;
  import org.eclipse.aether.named.NamedLockKey;
  import org.eclipse.aether.spi.locking.LockingInhibitor;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Wrapping {@link NameMapper} class that applies discovered {@link org.eclipse.aether.spi.locking.LockingInhibitor}.
   *
   * @since 2.0.14
   */
  public class InhibitingNameMapper implements NameMapper {
      private final NameMapper delegate;
      private final List<LockingInhibitor> lockingInhibitors;
  
      public InhibitingNameMapper(NameMapper delegate, List<LockingInhibitor> lockingInhibitors) {
          this.delegate = requireNonNull(delegate);
          this.lockingInhibitors = requireNonNull(lockingInhibitors);
      }
  
      @Override
      public boolean isFileSystemFriendly() {
          return delegate.isFileSystemFriendly();
      }
  
      @Override
      public Collection<NamedLockKey> nameLocks(
              RepositorySystemSession session,
              Collection<? extends Artifact> artifacts,
              Collection<? extends Metadata> metadatas) {
          if (lockingInhibitors.isEmpty()) {
              return delegate.nameLocks(session, artifacts, metadatas);
          }
          if (artifacts != null && !artifacts.isEmpty()) {
              List<Artifact> filtered = new ArrayList<>(artifacts.size());
              for (Artifact a : artifacts) {
                  if (!isArtifactInhibited(a)) {
                      filtered.add(a);
                  }
              }
              artifacts = filtered;
          }
          if (metadatas != null && !metadatas.isEmpty()) {
              List<Metadata> filtered = new ArrayList<>(metadatas.size());
              for (Metadata m : metadatas) {
                  if (!isMetadataInhibited(m)) {
                      filtered.add(m);
                  }
              }
              metadatas = filtered;
          }
          return delegate.nameLocks(session, artifacts, metadatas);
      }
  
      private boolean isArtifactInhibited(Artifact artifact) {
          for (LockingInhibitor inhibitor : lockingInhibitors) {
              if (inhibitor.preventArtifactLocking(artifact)) {
                  return true;
              }
          }
          return false;
      }
  
      private boolean isMetadataInhibited(Metadata metadata) {
          for (LockingInhibitor inhibitor : lockingInhibitors) {
              if (inhibitor.preventMetadataLocking(metadata)) {
                  return true;
              }
          }
          return false;
      }
  }