edu.stanford.nlp.trees

Class SimpleTree

java.lang.Object

java.util.AbstractCollection<Tree>

edu.stanford.nlp.trees.Tree

edu.stanford.nlp.trees.SimpleTree

All Implemented Interfaces:

Label, Labeled, Scored, Serializable, Iterable<Tree>, Collection<Tree>

public class SimpleTree
extends Tree

A SimpleTree is a minimal concrete implementation of an unlabeled, unscored Tree. It has a tree structure, but nothing is stored at a node (no label or score). So, most of the time, this is the wrong class to use! Look at LabeledScoredTreeNode.

Author:

Christopher Manning

See Also:

Serialized Form

Field Summary

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

EMPTY_TREE_ARRAY

Constructor Summary

Constructors

Constructor and Description
SimpleTree() Create an empty parse tree.
SimpleTree(Label label) Create parse tree with given root and null daughters.
SimpleTree(Label label, List<Tree> daughterTreesList) Create parse tree with given root and array of daughter trees.

Method Summary

Methods

Modifier and Type	Method and Description
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 SimpleTree type.
void	setChildren(Tree[] children) Sets the children of this Tree.
TreeFactory	treeFactory() Return a TreeFactory that produces trees of the SimpleTree type.

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

addChild, addChild, ancestor, cCommands, constituents, constituents, constituents, constituents, constituents, deepCopy, deepCopy, deepCopy, dependencies, dependencies, dependencies, depth, depth, dominates, dominationPath, equals, firstChild, flatten, flatten, getChild, getChildrenAsList, getLeaves, getLeaves, getNodeNumber, getSpan, hashCode, headPreTerminal, headTerminal, headTerminal, indentedListPrint, indentedListPrint, indentedXMLPrint, indentedXMLPrint, indexLeaves, indexLeaves, indexLeaves, indexSpans, indexSpans, indexSpans, insertDtr, isLeaf, isPhrasal, isPrePreTerminal, isPreTerminal, isUnaryRewrite, iterator, joinNode, label, labeledYield, labeledYield, labelFactory, labels, lastChild, leftCharEdge, localTree, localTrees, mapDependencies, mapDependencies, nodeNumber, nodeString, numChildren, objectIndexOf, parent, parent, pathNodeToNode, pennPrint, pennPrint, pennPrint, pennPrint, pennPrint, pennString, percolateHeadAnnotations, percolateHeadIndices, percolateHeads, postOrderNodeList, preOrderNodeList, preTerminalYield, preTerminalYield, printLocalTree, printLocalTree, prune, prune, removeChild, rightCharEdge, score, setChild, setChildren, setFromString, setLabel, setLabels, setScore, setSpans, setValue, siblings, size, skipRoot, spliceOut, spliceOut, subTreeList, subTrees, subTrees, taggedLabeledYield, taggedYield, taggedYield, toString, toStringBuilder, toStringBuilder, transform, transform, treeSkeletonCopy, treeSkeletonCopy, upperMostUnary, value, valueOf, valueOf, yield, yield, yield, yieldHasWord, yieldHasWord, yieldWords, yieldWords

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

SimpleTree

public SimpleTree()

Create an empty parse tree.

SimpleTree

public SimpleTree(Label label)

Create parse tree with given root and null daughters.

Parameters:

label - root label of new tree to construct. For a SimpleTree this parameter is ignored.

SimpleTree

public SimpleTree(Label label,
          List<Tree> daughterTreesList)

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

Parameters:

label - root label of tree to construct. For a SimpleTree this parameter is ignored

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 sets the Tree's children to a unique zero-length Tree[] array.

Overrides:

setChildren in class Tree

Parameters:

children - An array of child trees

See Also:

Tree.setChildren(List)

treeFactory

public TreeFactory treeFactory()

Return a TreeFactory that produces trees of the SimpleTree type. The factory returned is always the same one (a singleton).

Specified by:

treeFactory in class Tree

Returns:

a factory to produce simple (unlabelled) trees

factory

public static TreeFactory factory()

Return a TreeFactory that produces trees of the SimpleTree type. The factory returned is always the same one (a singleton).

Returns:

a factory to produce simple (unlabelled) trees