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TODAY Infrastructure Application Loader

There is a newer version: 5.0.0-Draft.1

/*
 * Copyright 2017 - 2023 the original author or authors.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see [http://www.gnu.org/licenses/]
 */

package cn.taketoday.app.loader;

import java.lang.reflect.Method;

/**
 * Utility class that is used by {@link Launcher}s to call a main method. The class
 * containing the main method is loaded using the thread context class loader.
 *
 * @author Phillip Webb
 * @author Andy Wilkinson
 * @author Harry Yang
 * @since 4.0
 */
public class MainMethodRunner {

  private final String mainClassName;

  private final String[] args;

  /**
   * Create a new {@link MainMethodRunner} instance.
   *
   * @param mainClass the main class
   * @param args incoming arguments
   */
  public MainMethodRunner(String mainClass, String[] args) {
    this.mainClassName = mainClass;
    this.args = (args != null) ? args.clone() : null;
  }

  public void run() throws Exception {
    Class mainClass = Class.forName(this.mainClassName, false, Thread.currentThread().getContextClassLoader());
    Method mainMethod = mainClass.getDeclaredMethod("main", String[].class);
    mainMethod.setAccessible(true);
    mainMethod.invoke(null, new Object[] { this.args });
  }

}