Level1FeatureCalculator

All Implemented Interfaces:

ai.platon.pulsar.dom.features.FeatureCalculator
```
public final class Level1FeatureCalculator
extends AbstractFeatureCalculator
                    
```
The level 1 feature calculator calculate for the minimal features.
Uses a document-level FeatureBlock to store all node feature vectors in a single contiguous DoubleArray with zero per-node heap allocations during calculation. Only FeatureBlock + DoubleArray are allocated — no intermediate vector objects.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description

Field Summary

Fields
Modifier and Type	Field	Description
`private final FeatureBlock`	`featureBlock`

Constructor Summary

Constructors
Constructor	Description
`Level1FeatureCalculator()`

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`final FeatureBlock`	`getFeatureBlock()`	The FeatureBlock for the current document being calculated.
`Unit`	`calculate(Document document)`
`Unit`	`dispose()`

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

- Constructor Detail
  - Level1FeatureCalculator
```
Level1FeatureCalculator()
```
- Method Detail
  - getFeatureBlock
```
 final FeatureBlock getFeatureBlock()
```
    The FeatureBlock for the current document being calculated. Set during calculate and accessible after calculation completes.
  - calculate
```
 Unit calculate(Document document)
```
  - dispose
```
 Unit dispose()
```