fish.payara.micro.boot.loader.MainMethodRunner Maven / Gradle / Ivy
/*
* Copyright 2012-2016 the original author or authors.
*
* 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 fish.payara.micro.boot.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
*/
public class MainMethodRunner {
private final String mainClassName;
private final String mainMethodName;
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, String mainMethodName) {
this.mainClassName = mainClass;
this.mainMethodName = mainMethodName;
this.args = (args == null ? null : args.clone());
}
public Object run() throws Exception {
Class mainClass = Thread.currentThread().getContextClassLoader()
.loadClass(this.mainClassName);
Method mainMethod = mainClass.getDeclaredMethod(mainMethodName, String[].class);
return mainMethod.invoke(null, new Object[] { this.args });
}
}