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

Class PruneNodeLowerThanThreshold

java.lang.Object

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

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

Direct Known Subclasses:

PruneNodeThresholdAndDistanceFromSpecificLabelledNode

public class PruneNodeLowerThanThreshold
extends NodeToBePrunedCheckerAbstractClass

Prune a node if the absolute value of the field weightfield (default value "weight") is lower than threshold. Nodes which do not have a weight are given a default value defaultWeightValue. Depending on the value of boolean variable avoidOrphans, a node is never removed if it has descendants which are not removed (avoidOrphans==true).

Author:

Giovanni Da San Martino Contributor Alessandro Moschitti

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PruneNodeLowerThanThreshold.nodeComparisonOperator

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	avoidOrphans
protected double	defaultWeightValue
protected PruneNodeLowerThanThreshold.nodeComparisonOperator	nodeComparisonType
protected double	threshold
protected String	weightField

Constructor Summary

Constructors

Constructor and Description
PruneNodeLowerThanThreshold(double threshold)
PruneNodeLowerThanThreshold(double pruningThreshold, String weightFieldName, boolean avoidOrphans, double defaultWeightValue)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	checkThresholdCondition(TreeNode node)
String	describe()
boolean	isNodeToBePruned(TreeNode node)
void	setComparisonTypeLowerThanAbsoluteValue()
void	setComparisonTypeLowerThanValue()
void	setDefaultWeightValue(double weightValue)

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

threshold

protected double threshold

weightField

protected String weightField

avoidOrphans

protected boolean avoidOrphans

defaultWeightValue

protected double defaultWeightValue

nodeComparisonType

protected PruneNodeLowerThanThreshold.nodeComparisonOperator nodeComparisonType

Constructor Detail

PruneNodeLowerThanThreshold

public PruneNodeLowerThanThreshold(double pruningThreshold,
                           String weightFieldName,
                           boolean avoidOrphans,
                           double defaultWeightValue)

PruneNodeLowerThanThreshold

public PruneNodeLowerThanThreshold(double threshold)

Method Detail

describe

public String describe()

Overrides:

describe in class NodeToBePrunedCheckerAbstractClass

isNodeToBePruned

public boolean isNodeToBePruned(TreeNode node)

Specified by:

isNodeToBePruned in class NodeToBePrunedCheckerAbstractClass

Parameters:

node - a TreeNode object

Returns:

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

checkThresholdCondition

public boolean checkThresholdCondition(TreeNode node)

setComparisonTypeLowerThanAbsoluteValue

public void setComparisonTypeLowerThanAbsoluteValue()

setComparisonTypeLowerThanValue

public void setComparisonTypeLowerThanValue()

setDefaultWeightValue

public void setDefaultWeightValue(double weightValue)