content: /*
   * Copyright 2019 Red Hat, Inc.
   *
   * Licensed 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.aesh.util.graal;
  
  import org.aesh.command.Command;
  import org.aesh.command.CommandDefinition;
  import org.aesh.command.CommandException;
  import org.aesh.command.CommandResult;
  import org.aesh.command.container.CommandContainer;
  import org.aesh.command.container.CommandContainerBuilder;
  import org.aesh.command.impl.container.AeshCommandContainerBuilder;
  import org.aesh.command.invocation.CommandInvocation;
  import org.aesh.command.option.Argument;
  import org.aesh.command.option.Option;
  import org.aesh.command.parser.CommandLineParserException;
  
  import java.io.BufferedWriter;
  import java.io.IOException;
  import java.nio.file.Files;
  import java.nio.file.Paths;
  import java.nio.file.StandardOpenOption;
  
  /**
   * @author <a href="mailto:stalep@gmail.com">Ståle Pedersen</a>
   */
  @CommandDefinition(name = "graalreflection", description = "Generates a json file to help graal generate a native image")
  public class GraalReflectionCommand implements Command {
  
      @Option(hasValue = false)
      private boolean help;
  
      @Argument(required = true, description = "Command class name")
      private String command;
  
  
      @Override
      public CommandResult execute(CommandInvocation commandInvocation) throws CommandException, InterruptedException {
          if (help) {
              commandInvocation.getHelpInfo("graalreflection");
          } else {
              Class<Command<CommandInvocation>> clazz = loadCommand(command);
              if (clazz != null) {
                  CommandContainerBuilder<CommandInvocation> builder = new AeshCommandContainerBuilder<>();
                  try {
                      CommandContainer<CommandInvocation> container = builder.create(clazz);
                      GraalReflectionFileGenerator graalFileGenerator = new GraalReflectionFileGenerator();
                      try (BufferedWriter w = Files.newBufferedWriter(Paths.get(container.getParser().getProcessedCommand().name().toLowerCase() + "_reflection.json"), StandardOpenOption.CREATE)) {
                          graalFileGenerator.generateReflection(container.getParser(), w);
                      }
                      container.getParser().getProcessedCommand();
  
                  } catch (CommandLineParserException | IOException e) {
                      e.printStackTrace();
                  }
              } else
                  commandInvocation.println("Could not load command: " + command);
          }
          return CommandResult.SUCCESS;
      }
  
      @SuppressWarnings("unchecked")
      private Class<Command<CommandInvocation>> loadCommand(String commandName) {
          try {
              return (Class<Command<CommandInvocation>>) Class.forName(commandName);
          } catch (ClassNotFoundException | ClassCastException e) {
              e.printStackTrace();
          }
  
          return null;
      }
  }
  