public void setMetaClass(Object obj, MetaClass theMetaClass) {
Class theClass = obj.getClass();
final ClassInfo info = ClassInfo.getClassInfo(theClass);
MetaClass oldMC = null;
info.lock();
try {
oldMC = info.getPerInstanceMetaClass(obj);
info.setPerInstanceMetaClass(obj, theMetaClass);
} finally {
info.unlock();
}
fireConstantMetaClassUpdate(obj, theClass, oldMC, theMetaClass);
}
/**
* if oldMc is null, newMc will replace whatever meta class was used before. if oldMc is not null,
* then newMc will be used only if he stored mc is the same as oldMc
*/
private void setMetaClass(Class theClass, MetaClass oldMc, MetaClass newMc) {
final ClassInfo info = ClassInfo.getClassInfo(theClass);
MetaClass mc = null;
info.lock();
try {
mc = info.getStrongMetaClass();
info.setStrongMetaClass(newMc);
} finally {
info.unlock();
}
if ((oldMc == null && mc != newMc) || (oldMc != null && mc != newMc && mc != oldMc)) {
fireConstantMetaClassUpdate(null, theClass, mc, newMc);
}
}