Um clone com campos a excluir maroto.

Clonefy.java

package br.inf.carlos.base.util.cloning;

import java.lang.reflect.Field;
import java.util.Arrays;
import java.util.List;

import net.vidageek.mirror.dsl.Mirror;
import net.vidageek.mirror.list.dsl.Matcher;
import net.vidageek.mirror.list.dsl.MirrorList;

public class Clonefy {

	@SuppressWarnings("unchecked")
	public static <T> T clone(T object, String... excludes){
		
		Mirror mirror = new Mirror();
		final List<String> blacklist = Arrays.asList(excludes);
		
		MirrorList<Field> fields = mirror.on(object.getClass()).reflectAll().fields().matching(new Matcher<Field>() {
			@Override
			public boolean accepts(Field field) {
				return !blacklist.contains(field.getName());
			}
		});

		Object clone = mirror.on(object.getClass()).invoke().constructor().bypasser();
		
		for (Field f : fields) {
			mirror.on(clone).set().field(f.getName()).withValue(mirror.on(object).get().field(f));
		}
		
		return (T) clone;
	}
}