import edu.stanford.nlp.trees.GrammaticalRelation.Language; //导入依赖的package包/类
public GrammaticalRelation get(Object key) {
  if (!(key instanceof String)) {
    throw new UnsupportedOperationException();
  }
  String strkey = (String)key;
  return new GrammaticalRelation(Language.Any, strkey, null, null, DEPENDENT) {
     private static final long serialVersionUID = 1L;

     @Override
    public boolean equals(Object o) {
      if (o instanceof GrammaticalRelation) {
         return this.getShortName().equals(((GrammaticalRelation)o).getShortName());
      }
      return false;
    }
    
    @Override
    public int hashCode() {
      return this.getShortName().hashCode();
    }
  };
}
 

import edu.stanford.nlp.trees.GrammaticalRelation.Language; //导入依赖的package包/类
/**
 * Get the predefined GrammaticalRelation instance or make a new GrammaticalRelation instance
 * 
 * @param name
 * @return
 */
public static GrammaticalRelation getGrammaticalRelation(String name) {
	GrammaticalRelation reln = GrammaticalRelation.valueOf(name, COMMON_RELATIONS);
	if (reln == null)
		reln = GrammaticalRelation.valueOf(Language.English, name);
	return reln;
}
 

import edu.stanford.nlp.trees.GrammaticalRelation.Language; //导入依赖的package包/类
/**
 * The "conj" grammatical relation. Used to collapse conjunct relations.
 * They will be turned into conj_word, where "word" is a conjunction.
 *
 * NOTE: Because these relations lack associated GrammaticalRelationAnnotations,
 *       they cannot be arcs of a TreeGraphNode.
 *
 * @param conjunctionString The conjunction to make a GrammaticalRelation out of
 * @return A grammatical relation for this conjunction
 */
public static GrammaticalRelation getConj(String conjunctionString) {
  GrammaticalRelation result = conjs.get(conjunctionString);
  if (result == null) {
    synchronized(conjs) {
      result = conjs.get(conjunctionString);
      if (result == null) {
        result = new GrammaticalRelation(Language.English, "conj", "conj_collapsed", null, CONJUNCT, conjunctionString);
        conjs.put(conjunctionString, result);
        threadSafeAddRelation(result);
      }
    }
  }
  return result;
}
 

import edu.stanford.nlp.trees.GrammaticalRelation.Language; //导入依赖的package包/类
/**
 * The "prep" grammatical relation. Used to collapse prepositions.<p>
 * They will be turned into prep_word, where "word" is a preposition
 *
 * NOTE: Because these relations lack associated GrammaticalRelationAnnotations,
 *       they cannot be arcs of a TreeGraphNode.
 *
 * @param prepositionString The preposition to make a GrammaticalRelation out of
 * @return A grammatical relation for this preposition
 */
public static GrammaticalRelation getPrep(String prepositionString) {
  GrammaticalRelation result = preps.get(prepositionString);
  if (result == null) {
    synchronized(preps) {
      result = preps.get(prepositionString);
      if (result == null) {
        result = new GrammaticalRelation(Language.English, "prep", "prep_collapsed", null, PREPOSITIONAL_MODIFIER, prepositionString);
        preps.put(prepositionString, result);
        threadSafeAddRelation(result);
      }
    }
  }
  return result;
}
 

import edu.stanford.nlp.trees.GrammaticalRelation.Language; //导入依赖的package包/类
/**
 * The "prepc" grammatical relation. Used to collapse preposition
 * complements.<p>
 * They will be turned into prep_word, where "word" is a preposition
 *
 * NOTE: Because these relations lack associated GrammaticalRelationAnnotations,
 *       they cannot be arcs of a TreeGraphNode.
 *
 * @param prepositionString The preposition to make a GrammaticalRelation out of
 * @return A grammatical relation for this preposition
 */
public static GrammaticalRelation getPrepC(String prepositionString) {
  GrammaticalRelation result = prepsC.get(prepositionString);
  if (result == null) {
    synchronized(prepsC) {
      result = prepsC.get(prepositionString);
      if (result == null) {
        result = new GrammaticalRelation(Language.English, "prepc", "prepc_collapsed", null, DEPENDENT, prepositionString);
        prepsC.put(prepositionString, result);
        threadSafeAddRelation(result);
      }
    }
  }
  return result;
}