/*
    * 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.jdk;
  
  import javax.inject.Named;
  
  import org.eclipse.aether.RepositorySystemSession;
  import org.eclipse.aether.repository.RemoteRepository;
  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;
  
  /**
   * JDK Transport factory: on Java11+ it works.
   *
   * @since 2.0.0
   */
  @Named(JdkTransporterFactory.NAME)
  public final class JdkTransporterFactory implements TransporterFactory {
      public static final String NAME = "jdk";
  
      private float priority = 10.0f;
  
      @Override
      public float getPriority() {
          return priority;
      }
  
      public JdkTransporterFactory 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");
  
          if (!"http".equalsIgnoreCase(repository.getProtocol()) && !"https".equalsIgnoreCase(repository.getProtocol())) {
              throw new NoTransporterException(repository, "Only HTTP/HTTPS is supported");
          }
  
          return new JdkTransporter(session, repository, javaVersion());
      }
  
      private static int javaVersion() {
          try {
              final String version = System.getProperty("java.version", "11" /* default must pass */);
              final int dot = version.indexOf('.');
              final int hyphen = version.indexOf('-');
              final int sep = (dot > 0 && dot < hyphen || hyphen < 0) ? dot : hyphen;
              return Integer.parseInt(sep > 0 ? version.substring(0, sep) : version);
          } catch (final NumberFormatException nfe) {
              return 11; // cannot be a pre-java 11 version so let it pass
          }
      }
  }