/*
    * 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.transport.file;
  
  import javax.inject.Named;
  
  import java.nio.file.FileSystemNotFoundException;
  import java.nio.file.Paths;
  
  import org.eclipse.aether.RepositorySystemSession;
  import org.eclipse.aether.repository.RemoteRepository;
  import org.eclipse.aether.repository.RepositoryUriUtils;
  import org.eclipse.aether.spi.connector.transport.Transporter;
  import org.eclipse.aether.spi.connector.transport.TransporterFactory;
  import org.eclipse.aether.transfer.NoTransporterException;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * A transporter factory for repositories using the {@code file:} protocol.
   */
  @Named(FileTransporterFactory.NAME)
  public final class FileTransporterFactory implements TransporterFactory {
      public static final String NAME = "file";
  
      private float priority;
  
      /**
       * Creates an (uninitialized) instance of this transporter factory. <em>Note:</em> In case of manual instantiation
       * by clients, the new factory needs to be configured via its various mutators before first use or runtime errors
       * will occur.
       */
      public FileTransporterFactory() {
          // enables default constructor
      }
  
      @Override
      public float getPriority() {
          return priority;
      }
  
      /**
       * Sets the priority of this component.
       *
       * @param priority The priority.
       * @return This component for chaining, never {@code null}.
       */
      public FileTransporterFactory setPriority(float priority) {
          this.priority = priority;
          return this;
      }
  
      @Override
      public Transporter newInstance(RepositorySystemSession session, RemoteRepository repository)
              throws NoTransporterException {
          requireNonNull(session, "session cannot be null");
          requireNonNull(repository, "repository cannot be null");
  
          // special case in file transport: to support custom FS providers (like JIMFS), we cannot
          // cover "all possible protocols" to throw NoTransporterEx, but we rely on FS rejecting the URI
          FileTransporter.FileOp fileOp = FileTransporter.FileOp.COPY;
          String repositoryUrl = repository.getUrl();
          if (repositoryUrl.startsWith("symlink+")) {
              fileOp = FileTransporter.FileOp.SYMLINK;
              repositoryUrl = repositoryUrl.substring("symlink+".length());
          } else if (repositoryUrl.startsWith("hardlink+")) {
              fileOp = FileTransporter.FileOp.HARDLINK;
              repositoryUrl = repositoryUrl.substring("hardlink+".length());
          }
          try {
              return new FileTransporter(
                      Paths.get(RepositoryUriUtils.toUri(repositoryUrl)).toAbsolutePath(), fileOp);
          } catch (FileSystemNotFoundException | IllegalArgumentException e) {
              throw new NoTransporterException(repository, e);
          }
      }
  }