org.codehaus.groovy.tools.GroovyStarter Maven / Gradle / Ivy
/*
* 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.codehaus.groovy.tools;
import java.io.FileInputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* Helper class to initialize the Groovy runtime.
*/
public class GroovyStarter {
static void printUsage() {
System.out.println("possible programs are 'groovyc','groovy','console', and 'groovysh'");
System.exit(1);
}
public static void rootLoader(String args[]) {
String conf = System.getProperty("groovy.starter.conf",null);
final LoaderConfiguration lc = new LoaderConfiguration();
// evaluate parameters
boolean hadMain=false, hadConf=false, hadCP=false;
int argsOffset = 0;
while (args.length-argsOffset>0 && !(hadMain && hadConf && hadCP)) {
if (args[argsOffset].equals("--classpath")) {
if (hadCP) break;
if (args.length==argsOffset+1) {
exit("classpath parameter needs argument");
}
lc.addClassPath(args[argsOffset+1]);
argsOffset+=2;
hadCP=true;
} else if (args[argsOffset].equals("--main")) {
if (hadMain) break;
if (args.length==argsOffset+1) {
exit("main parameter needs argument");
}
lc.setMainClass(args[argsOffset+1]);
argsOffset+=2;
hadMain=true;
} else if (args[argsOffset].equals("--conf")) {
if (hadConf) break;
if (args.length==argsOffset+1) {
exit("conf parameter needs argument");
}
conf=args[argsOffset+1];
argsOffset+=2;
hadConf=true;
} else {
break;
}
}
// this allows to override the commandline conf
String confOverride = System.getProperty("groovy.starter.conf.override",null);
if (confOverride!=null) conf = confOverride;
// we need to know the class we want to start
if (lc.getMainClass()==null && conf==null) {
exit("no configuration file or main class specified");
}
// copy arguments for main class
String[] newArgs = new String[args.length-argsOffset];
for (int i=0; i() {
public RootLoader run() {
return new RootLoader(lc);
}
});
Method m=null;
try {
Class c = loader.loadClass(lc.getMainClass());
m = c.getMethod("main", new Class[]{String[].class});
} catch (ClassNotFoundException e1) {
exit(e1);
} catch (SecurityException e2) {
exit(e2);
} catch (NoSuchMethodException e2) {
exit(e2);
}
try {
m.invoke(null, new Object[]{newArgs});
} catch (IllegalArgumentException e3) {
exit(e3);
} catch (IllegalAccessException e3) {
exit(e3);
} catch (InvocationTargetException e3) {
exit(e3);
}
}
private static void exit(Exception e) {
e.printStackTrace();
System.exit(1);
}
private static void exit(String msg) {
System.err.println(msg);
System.exit(1);
}
public static void main(String args[]) {
try {
rootLoader(args);
} catch (Throwable t) {
t.printStackTrace();
}
}
}