FeatureNode (searchlib 7.501.17 API)

java.lang.Object
- com.yahoo.searchlib.gbdt.TreeNode
- - com.yahoo.searchlib.gbdt.FeatureNode

Direct Known Subclasses:

CategoryFeatureNode, NumericFeatureNode
```
public abstract class FeatureNode
extends TreeNode
```
A node in a GBDT tree which references a feature value

Author:

bratseth

Constructor Summary

Constructors
Constructor Description

FeatureNode(String feature, Optional<Integer> samples, TreeNode left, TreeNode right)

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`feature()`
`static FeatureNode`	`fromDom(Node node)`
`TreeNode`	`left()`
`protected abstract String`	`rankingExpressionCondition()`
`TreeNode`	`right()`
`String`	`toRankingExpression()`

Methods inherited from class com.yahoo.searchlib.gbdt.TreeNode
samples

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FeatureNode

public FeatureNode(String feature,
                   Optional<Integer> samples,
                   TreeNode left,
                   TreeNode right)

Method Detail

feature
```
public String feature()
```

left
```
public TreeNode left()
```

right
```
public TreeNode right()
```

toRankingExpression
```
public String toRankingExpression()
```
Specified by:

toRankingExpression in class TreeNode

rankingExpressionCondition

protected abstract String rankingExpressionCondition()

fromDom

public static FeatureNode fromDom(Node node)