Android Open Source - DKO Main

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Back to project page DKO.
License

The source code is released under:
GNU Lesser General Public License
If you think the Android project DKO listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

package org.kered.dko.ant;
/*from w w  w  .j a  v a2s  .c  om*/
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;

public class Main {

  static Map<String,Class<?>> commands = new LinkedHashMap<String,Class<?>>();
  static {
    commands.put("extract-schema", SchemaExtractorBase.class);
    commands.put("generate-dkos", CodeGeneratorBase.class);
  }
  
  /**
   * @param args
   */
  public static void main(String[] args) {
    if (args.length==0) {
      printHelp();
      return;
    }
    String commandName = args[0];
    Class<?> command = commands.get(commandName);
    if (command==null) {
      printHelp();
      return;
    }
    String[] options = new String[args.length-1];
    System.arraycopy(args, 1, options, 0, options.length);
    runCommand(commandName, command, options);
  }

  private static void runCommand(String commandName, Class<?> command, String[] options) {
    try {
      Object o = command.newInstance();
      String optionName = null;
      for (String option : options) {
        if (option.equals("--help")) {
          printHelp(commandName, command);
          return;
        } else if (option.startsWith("--")) {
          optionName = option.substring(2);
        } else {
          call(command, o, optionName, option);
        }
      }
      command.getMethod("execute").invoke(o);
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  private static void call(Class<?> command, Object o, String optionName, String option) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException {
    Method m = findSetter(command, optionName);
    m.invoke(o, option);
  }

  private static Method findSetter(Class<?> command, String optionName) throws NoSuchMethodException, SecurityException {
    String setter = "set"+ Util.underscoreToCamelCase(optionName.replace('-', '_'), true);
    for (Method m : command.getDeclaredMethods()) {
      if (m.getName().equalsIgnoreCase(setter)) return m;
    }
    throw new RuntimeException("could not find method for: "+ optionName);
  }

  private static void printHelp(String commandName, Class<?> command) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException {
    System.err.println("");
    String header = " Help for command: "+ commandName +" ";
    System.err.println(header);
    for (int i=0; i<header.length(); ++i) System.err.print("-");
    System.err.println("\n");
    for (Method method : command.getMethods()) {
      String name = method.getName();
      if (!name.startsWith("set")) continue;
      String optionName = "--"+ Util.splitCamelCase(name.substring(3)).trim().replace(' ', '-').toLowerCase();
      Object helpText = command.getDeclaredMethod("getHelp", String.class).invoke(null, name);
      if (helpText==null) continue;
      System.err.println(optionName +" "+ helpText);
      System.err.println("");
    }
  }

  private static void printHelp() {
    System.err.println("ERROR: Unrecognized command.");
    System.err.println("Syntax: java -jar lib/dko.jar <command> [command_option...]");
    System.err.println("");
    System.err.println("Where <command> is one of the following:");
    for (Entry<String, Class<?>> e : commands.entrySet()) {
      System.err.print("  ");
      System.err.print(e.getKey());
      System.err.print(":\t");
      try {
        Method help = e.getValue().getDeclaredMethod("getDescription");
        System.err.println(help.invoke(null));
      } catch (Exception e1) {
        System.err.println("(no description available)");
      }
    }
    System.err.println("");
    System.err.println("For help on an individual command, run the command with '--help'.");
    System.err.println("");
  }

}
Java Source Code List
