import edu.stanford.nlp.ling.CoreLabel.GenericAnnotation; //导入依赖的package包/类
/**
 * This constructor allows us to use reflection for loading old class keys.
 * This is useful because we can then create distributions that do not have
 * all of the classes required for all the old keys (such as trees package classes).
 */
private KeyLookup(String className, String oldKey) {
  Class<?> keyClass;
  try {
   keyClass = Class.forName(className);
  } catch(ClassNotFoundException e) {
    GenericAnnotation<Object> newKey = new GenericAnnotation<Object>() {
      public Class<Object> getType() { return Object.class;} };
    keyClass = newKey.getClass();
  }
  this.coreKey = ErasureUtils.uncheckedCast(keyClass);
  this.oldKey = oldKey;
}
 

import edu.stanford.nlp.ling.CoreLabel.GenericAnnotation; //导入依赖的package包/类
@SuppressWarnings({"unchecked", "SuspiciousMethodCalls"})
private void makeGenericKeyCache(CoreLabel c) {
  genericAnnotationKeys = Generics.newHashSet();
  for (Class<?> key : c.keySet()) {
    if (CoreLabel.genericValues.containsKey(key)) {
      Class<? extends GenericAnnotation<?>> genKey = (Class<? extends GenericAnnotation<?>>) key;
      genericAnnotationKeys.add(genKey);
    }
  }
}