Mega Code Archive
Force the given class to be loaded fully
<![CDATA[
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.URL;
import java.security.CodeSource;
import java.security.ProtectionDomain;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
public class Main {
/**
* Force the given class to be loaded fully.
*
* <p>
* This method attempts to locate a static method on the given class the
* attempts to invoke it with dummy arguments in the hope that the virtual
* machine will prepare the class for the method call and call all of the
* static class initializers.
*
* @param type
* Class to force load.
*
* @throws NullArgumentException
* Type is <i>null</i>.
*/
public static void forceLoad(final Class type) {
if (type == null)
System.out.println("Null Argument Exception");
// don't attempt to force primitives to load
if (type.isPrimitive())
return;
// don't attempt to force java.* classes to load
String packageName = Classes.getPackageName(type);
// System.out.println("package name: " + packageName);
if (packageName.startsWith("java.") || packageName.startsWith("javax.")) {
return;
}
// System.out.println("forcing class to load: " + type);
try {
Method methods[] = type.getDeclaredMethods();
Method method = null;
for (int i = 0; i < methods.length; i++) {
int modifiers = methods[i].getModifiers();
if (Modifier.isStatic(modifiers)) {
method = methods[i];
break;
}
}
if (method != null) {
method.invoke(null, (Object[]) null);
} else {
type.newInstance();
}
} catch (Exception ignore) {
ignore.printStackTrace();
}
}
}
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