edu.stanford.nlp.parser.lexparser
Class BoundaryRemover
java.lang.Object
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
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
BoundaryRemover
public BoundaryRemover()
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