gistfile1.txt

for (String id : container.getComponentIds()) {
  ComponentMetadata meta = container.getComponentMetadata(id);
  if (meta instanceof ExtendedBeanMetadata) {
    Class clazz = ((ExtendedBeanMetadata) meta).getRuntimeClass();
    if (AbstractPropertyPlaceholder.class.isAssignableFrom(clazz)) {
       AbstractPropertyPlaceholder ph = (AbstractPropertyPlaceholder) container.getComponentInstance(id);
       ...
    }
  }
}