BaseScanTaskGroup

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

All Implemented Interfaces:: java.io.Serializable, ScanTask, ScanTaskGroup<T>

public class BaseScanTaskGroup<T extends ScanTask>
extends java.lang.Object
implements ScanTaskGroup<T>

See Also:: Serialized Form

Constructor Summary

Constructors
Constructor Description

BaseScanTaskGroup(java.util.Collection<T> tasks)

BaseScanTaskGroup(StructLike groupingKey, java.util.Collection<T> tasks)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`StructLike`	`groupingKey()`	Returns a grouping key for this task group.
`java.util.Collection<T>`	`tasks()`	Returns scan tasks in this group.
`java.lang.String`	`toString()`

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

Methods inherited from interface org.apache.iceberg.ScanTask
asCombinedScanTask, asDataTask, asFileScanTask, isDataTask, isFileScanTask

Methods inherited from interface org.apache.iceberg.ScanTaskGroup
estimatedRowsCount, filesCount, sizeBytes

- Constructor Detail
  - BaseScanTaskGroup
```
public BaseScanTaskGroup(StructLike groupingKey,
                         java.util.Collection<T> tasks)
```
  - BaseScanTaskGroup
```
public BaseScanTaskGroup(java.util.Collection<T> tasks)
```
- Method Detail
  - groupingKey
```
public StructLike groupingKey()
```
    Description copied from interface: ScanTaskGroup
    
    Returns a grouping key for this task group.
    A grouping key is a set of values that are common amongst all rows produced by the tasks in this task group. The values may be the result of transforming the underlying data. For example, a grouping key can consist of a bucket ordinal computed by applying a bucket transform to a column of the underlying rows. The grouping key type is determined at planning time and is identical across all task groups produced by a scan.
    Implementations should return an empty struct if the data grouping is random or unknown.
    
    Specified by:
    
    groupingKey in interface ScanTaskGroup<T extends ScanTask>
    
    Returns:
    
    a grouping key for this task group
  - tasks
```
public java.util.Collection<T> tasks()
```
    Description copied from interface: ScanTaskGroup
    
    Returns scan tasks in this group.
    
    Specified by:
    
    tasks in interface ScanTaskGroup<T extends ScanTask>
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object