FieldMetrics

java.lang.Object
- org.apache.iceberg.FieldMetrics<T>

Direct Known Subclasses:

DoubleFieldMetrics, FloatFieldMetrics
```
public class FieldMetrics<T>
extends java.lang.Object
```
Iceberg internally tracked field level metrics.

Constructor Summary

Constructors
Constructor	Description
`FieldMetrics(int id, long valueCount, long nullValueCount, long nanValueCount, T lowerBound, T upperBound)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`hasBounds()`	Returns if the metrics has bounds (i.e.
`int`	`id()`	Returns the id of the field that the metrics within this class are associated with.
`T`	`lowerBound()`	Returns the lower bound value of this field.
`long`	`nanValueCount()`	Returns the number of NaN values for this field.
`long`	`nullValueCount()`	Returns the number of null values for this field.
`T`	`upperBound()`	Returns the upper bound value of this field.
`long`	`valueCount()`	Returns the number of all values, including nulls, NaN and repeated, for the given field.

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

- Constructor Detail
  - FieldMetrics
```
public FieldMetrics(int id,
                    long valueCount,
                    long nullValueCount,
                    long nanValueCount,
                    T lowerBound,
                    T upperBound)
```
- Method Detail
  - id
```
public int id()
```
    Returns the id of the field that the metrics within this class are associated with.
  - valueCount
```
public long valueCount()
```
    Returns the number of all values, including nulls, NaN and repeated, for the given field.
  - nullValueCount
```
public long nullValueCount()
```
    Returns the number of null values for this field.
  - nanValueCount
```
public long nanValueCount()
```
    Returns the number of NaN values for this field. Will only be non-0 if this field is a double or float field.
  - lowerBound
```
public T lowerBound()
```
    Returns the lower bound value of this field.
  - upperBound
```
public T upperBound()
```
    Returns the upper bound value of this field.
  - hasBounds
```
public boolean hasBounds()
```
    Returns if the metrics has bounds (i.e. there is at least non-null value for this field)