it.uniroma2.sag.kelp.data.representation.tree.node.nodePruner

Class PruneNodeThresholdAndDistanceFromSpecificLabelledNode

java.lang.Object

it.uniroma2.sag.kelp.data.representation.tree.node.nodePruner.NodeToBePrunedCheckerAbstractClass

it.uniroma2.sag.kelp.data.representation.tree.node.nodePruner.PruneNodeLowerThanThreshold

it.uniroma2.sag.kelp.data.representation.tree.node.nodePruner.PruneNodeThresholdAndDistanceFromSpecificLabelledNode

public class PruneNodeThresholdAndDistanceFromSpecificLabelledNode
extends PruneNodeLowerThanThreshold

Prune a node if the following conditions are met: 1) there is no node at distance not greater than distance whose label starts with the prefix labelPrefix 2) the conditions specified in the parent class

Author:

Giovanni Da San Martino Contributor Alessandro Moschitti

Nested Class Summary

Nested classes/interfaces inherited from class it.uniroma2.sag.kelp.data.representation.tree.node.nodePruner.PruneNodeLowerThanThreshold

PruneNodeLowerThanThreshold.nodeComparisonOperator

Field Summary

Fields

Modifier and Type	Field and Description
protected int	distance
protected String	labelPrefix

Fields inherited from class it.uniroma2.sag.kelp.data.representation.tree.node.nodePruner.PruneNodeLowerThanThreshold

avoidOrphans, defaultWeightValue, nodeComparisonType, threshold, weightField

Constructor Summary

Constructors

Constructor and Description
PruneNodeThresholdAndDistanceFromSpecificLabelledNode(double threshold, String labelPrefix)
PruneNodeThresholdAndDistanceFromSpecificLabelledNode(double threshold, String weightField, boolean avoidOrphans, double defaultWeightValue, String labelPrefix, int distance)

Method Summary

Methods

Modifier and Type	Method and Description
String	describe()
protected void	init(String labelPrefix, int distance)
boolean	isNodeToBePruned(TreeNode node)
static boolean	noCloseNodeWithSpecificLabelPrefix(TreeNode node, String labelPrefix, int distance, TreeNode previousNode) Check if there is a node at a distance no greater than distance (the distance between a node and its neighbors is 1) whose label prefix starts with labelPrefix.

Methods inherited from class it.uniroma2.sag.kelp.data.representation.tree.node.nodePruner.PruneNodeLowerThanThreshold

checkThresholdCondition, setComparisonTypeLowerThanAbsoluteValue, setComparisonTypeLowerThanValue, setDefaultWeightValue

Methods inherited from class it.uniroma2.sag.kelp.data.representation.tree.node.nodePruner.NodeToBePrunedCheckerAbstractClass

initPruner

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

labelPrefix

protected String labelPrefix

distance

protected int distance

Constructor Detail

PruneNodeThresholdAndDistanceFromSpecificLabelledNode

public PruneNodeThresholdAndDistanceFromSpecificLabelledNode(double threshold,
                                                     String weightField,
                                                     boolean avoidOrphans,
                                                     double defaultWeightValue,
                                                     String labelPrefix,
                                                     int distance)

PruneNodeThresholdAndDistanceFromSpecificLabelledNode

public PruneNodeThresholdAndDistanceFromSpecificLabelledNode(double threshold,
                                                     String labelPrefix)

Method Detail

init

protected void init(String labelPrefix,
        int distance)

noCloseNodeWithSpecificLabelPrefix

public static boolean noCloseNodeWithSpecificLabelPrefix(TreeNode node,
                                         String labelPrefix,
                                         int distance,
                                         TreeNode previousNode)

Check if there is a node at a distance no greater than distance (the distance between a node and its neighbors is 1) whose label prefix starts with labelPrefix. It returns true if such node does not exists Example of invocation: noCloseNodeWithSpecificLabelPrefix(node, "REL", 1, node)

Parameters:

node - TreeNode

labelPrefix - prefix of node label

distance - number of steps of the visit

previousNode - used to avoid to call the recursive function on the same node

Returns:

true if there is no node in the neighborhood which satisfies the conditions above

isNodeToBePruned

public boolean isNodeToBePruned(TreeNode node)

Overrides:

isNodeToBePruned in class PruneNodeLowerThanThreshold

Parameters:

node - a TreeNode object

Returns:

true if the node is supposed to be pruned, false otherwise.

describe

public String describe()

Overrides:

describe in class PruneNodeLowerThanThreshold