edu.stanford.nlp.parser.lexparser
Class BoundaryRemover

java.lang.Object
  extended by edu.stanford.nlp.parser.lexparser.BoundaryRemover
All Implemented Interfaces:
TreeTransformer

public class BoundaryRemover
extends Object
implements TreeTransformer

Removes a boundary symbol (Lexicon.BOUNDARY_TAG or Lexicon.BOUNDARY), which is the rightmost daughter of a tree. Otherwise does nothing. This is needed because the dependency parser uses such symbols. Note: the transformTree method is destructive.

Author:
Christopher Manning

Constructor Summary
BoundaryRemover()
           
 
Method Summary
 Tree transformTree(Tree tree)
          Does whatever one needs to do to a particular tree.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

BoundaryRemover

public BoundaryRemover()
Method Detail

transformTree

public Tree transformTree(Tree tree)
Description copied from interface: TreeTransformer
Does whatever one needs to do to a particular tree. This routine is passed a whole Tree, and could itself work recursively, but the canonical usage is to invoke this method via the Tree.transform() method, which will apply the transformer in a bottom-up manner to each local Tree, and hence the implementation of TreeTransformer should merely examine and change a local (one-level) Tree.

Specified by:
transformTree in interface TreeTransformer
Parameters:
tree - A tree. Classes implementing this interface can assume that the tree passed in is not null.
Returns:
the transformed Tree


Stanford NLP Group