edu.stanford.nlp.trees
Class LabeledScoredTreeNode

java.lang.Object
  java.util.AbstractCollection
      edu.stanford.nlp.trees.Tree
          edu.stanford.nlp.trees.LabeledScoredTreeNode

All Implemented Interfaces:

Label, Labeled, Scored, Serializable, Iterable, Collection

public class LabeledScoredTreeNode
extends Tree

A LabeledScoredTreeNode represents a tree composed of a root label, a score, and an array of daughter parse trees. A parse tree derived from a rule provides information about the category of the root as well as a composite of the daughter categories.

Author:

Christopher Manning

See Also:

Serialized Form

Field Summary

Fields inherited from class edu.stanford.nlp.trees.Tree

ZEROCHILDREN

Constructor Summary

LabeledScoredTreeNode()
Create an empty parse tree.

LabeledScoredTreeNode(Label label, List daughterTreesList)
Create parse tree with given root and array of daughter trees.

Method Summary

Tree[]	children() Returns an array of children for the current node, or null if it is a leaf.
static TreeFactory	factory() Return a TreeFactory that produces trees of the LabeledScoredTree{Node|Leaf} type.
static TreeFactory	factory(LabelFactory lf) Return a TreeFactory that produces trees of the LabeledScoredTree{Node|Leaf} type, with the Label made with the supplied LabelFactory.
static Tree	flatTree(Sentence s)
Label	label() Returns the label associated with the current node, or null if there is no label
String	nodeString()
double	score() Returns the score associated with the current node, or Nan if there is no score
void	setChildren(Tree[] children) Sets the children of this Tree.
void	setLabel(Label label) Sets the label associated with the current node, if there is one.
void	setScore(double score) Sets the score associated with the current node, if there is one
StringBuffer	toStringBuffer(StringBuffer sb) Appends the printed form of a parse tree (as a bracketed String) to a StringBuffer.
TreeFactory	treeFactory() Return a TreeFactory that produces trees of the same type as the current Tree.

Methods inherited from class edu.stanford.nlp.trees.Tree

addChild, addChild, ancestor, cCommands, constituents, constituents, deepCopy, deepCopy, deeperCopy, deeperCopy, dependencies, dependencies, dependencies, dependencies, depth, dominates, dominationPath, equals, firstChild, flatten, flatten, getChild, getChildrenAsList, getLeaves, getLeaves, getSpan, hashCode, headPreTerminal, headTerminal, indentedListPrint, indentedListPrint, indexOf, insertDtr, isLeaf, isPhrasal, isPrePreTerminal, isPreTerminal, isUnaryRewrite, iterator, joinNode, labelFactory, labels, lastChild, leftCharEdge, localTree, numChildren, parent, parent, pathNodeToNode, pennPrint, pennPrint, pennPrint, pennString, percolateHeads, preTerminalYield, preTerminalYield, printLocalTree, printLocalTree, prune, prune, removeChild, rightCharEdge, setChild, setChildren, setFromString, setLabels, setSpans, setValue, siblings, size, spliceOut, spliceOut, subTreeList, subTrees, subTrees, taggedDependencies, taggedDependencies, taggedDependencies, taggedDependencies, taggedYield, taggedYield, toString, transform, transform, typedDependencies, typedDependenciesCollapsed, typedDependenciesCollapsed, upperMostUnary, value, valueOf, valueOf, yield, yield

Methods inherited from class java.util.AbstractCollection

add, addAll, clear, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

LabeledScoredTreeNode

public LabeledScoredTreeNode()

Create an empty parse tree.

LabeledScoredTreeNode

public LabeledScoredTreeNode(Label label,
                             List daughterTreesList)

Create parse tree with given root and array of daughter trees.

Parameters:

label - root label of tree to construct.

daughterTreesList - List of daughter trees to construct.

Method Detail

children

public Tree[] children()

Returns an array of children for the current node, or null if it is a leaf.

Specified by:

children in class Tree

Returns:

The children of the node

See Also:

Tree.getChildrenAsList()

setChildren

public void setChildren(Tree[] children)

Sets the children of this Tree. If given null, this method prints a warning and sets the Tree's children to the canonical zero-length Tree[] array. Constructing a LabeledScoredTreeLeaf is preferable in this case.

Overrides:

setChildren in class Tree

Parameters:

children - An array of child trees

See Also:

Tree.setChildren(List)

label

public Label label()

Returns the label associated with the current node, or null if there is no label

Specified by:

label in interface Labeled

Overrides:

label in class Tree

Returns:

The label of the node

setLabel

public void setLabel(Label label)

Sets the label associated with the current node, if there is one.

Specified by:

setLabel in interface Labeled

Overrides:

setLabel in class Tree

Parameters:

label - The label

score

public double score()

Returns the score associated with the current node, or Nan if there is no score

Specified by:

score in interface Scored

Overrides:

score in class Tree

Returns:

The score

setScore

public void setScore(double score)

Sets the score associated with the current node, if there is one

Overrides:

setScore in class Tree

Parameters:

score - The score

toStringBuffer

public StringBuffer toStringBuffer(StringBuffer sb)

Appends the printed form of a parse tree (as a bracketed String) to a StringBuffer.

Overrides:

toStringBuffer in class Tree

Parameters:

sb - The StringBuffer to append to

Returns:

StringBuffer returns the StringBuffer

flatTree

public static Tree flatTree(Sentence s)

treeFactory

public TreeFactory treeFactory()

Return a TreeFactory that produces trees of the same type as the current Tree. That is, this implementation, will produce trees of type LabeledScoredTree(Node|Leaf). The Label of this is examined, and providing it is not null, a LabelFactory which will produce that kind of Label is supplied to the TreeFactory. If the Label is null, a StringLabelFactory will be used. The factories returned on different calls a different: a new one is allocated each time.

Specified by:

treeFactory in class Tree

Returns:

a factory to produce labeled, scored trees

factory

public static TreeFactory factory()

Return a TreeFactory that produces trees of the LabeledScoredTree{Node|Leaf} type. The factory returned is always the same one (a singleton).

Returns:

a factory to produce labeled, scored trees

factory

public static TreeFactory factory(LabelFactory lf)

Return a TreeFactory that produces trees of the LabeledScoredTree{Node|Leaf} type, with the Label made with the supplied LabelFactory. The factory returned is a different one each time

Parameters:

lf - The LabelFactory to use

Returns:

a factory to produce labeled, scored trees

nodeString

public String nodeString()

Overrides:

nodeString in class Tree