com.datastrato.gravitino.dto.rel.partitioning

Class ListPartitioningDTO

java.lang.Object

com.datastrato.gravitino.dto.rel.partitioning.ListPartitioningDTO

All Implemented Interfaces:

Partitioning, Expression, Transform

public final class ListPartitioningDTO
extends java.lang.Object
implements Partitioning

Data transfer object representing a list partitioning.

Nested Class Summary

Nested classes/interfaces inherited from interface com.datastrato.gravitino.dto.rel.partitioning.Partitioning

Partitioning.SingleFieldPartitioning, Partitioning.Strategy

Nested classes/interfaces inherited from interface com.datastrato.gravitino.rel.expressions.transforms.Transform

Transform.SingleFieldTransform

Field Summary

Fields inherited from interface com.datastrato.gravitino.dto.rel.partitioning.Partitioning

EMPTY_PARTITIONING

Fields inherited from interface com.datastrato.gravitino.rel.expressions.Expression

EMPTY_EXPRESSION, EMPTY_NAMED_REFERENCE

Method Summary

Modifier and Type	Method and Description
Expression[]	arguments()
ListPartitionDTO[]	assignments()
java.lang.String[][]	fieldNames()
java.lang.String	name()
static ListPartitioningDTO	of(java.lang.String[][] fieldNames) Creates a new ListPartitioningDTO with no pre-assigned partitions.
static ListPartitioningDTO	of(java.lang.String[][] fieldNames, ListPartitionDTO[] assignments) Creates a new ListPartitioningDTO.
Partitioning.Strategy	strategy() Returns the name of the partitioning strategy.
void	validate(ColumnDTO[] columns) Validates the partitioning columns.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.datastrato.gravitino.rel.expressions.transforms.Transform

children

Methods inherited from interface com.datastrato.gravitino.rel.expressions.Expression

references

Method Detail

of

public static ListPartitioningDTO of(java.lang.String[][] fieldNames)

Creates a new ListPartitioningDTO with no pre-assigned partitions.

Parameters:

fieldNames - The names of the fields to partition.

Returns:

The new ListPartitioningDTO.

of

public static ListPartitioningDTO of(java.lang.String[][] fieldNames,
                                     ListPartitionDTO[] assignments)

Creates a new ListPartitioningDTO.

Parameters:

fieldNames - The names of the fields to partition.

assignments - The pre-assigned list partitions.

Returns:

The new ListPartitioningDTO.

fieldNames

public java.lang.String[][] fieldNames()

Returns:

The names of the fields to partition.

assignments

public ListPartitionDTO[] assignments()

Specified by:

assignments in interface Transform

Returns:

The preassigned partitions in the partitioning. Currently, only Transforms.ListTransform and Transforms.RangeTransform need to deal with assignments

strategy

public Partitioning.Strategy strategy()

Description copied from interface: Partitioning

Returns the name of the partitioning strategy.

Specified by:

strategy in interface Partitioning

Returns:

The strategy of the partitioning.

validate

public void validate(ColumnDTO[] columns)
              throws java.lang.IllegalArgumentException

Validates the partitioning columns.

Specified by:

validate in interface Partitioning

Parameters:

columns - The columns to be validated.

Throws:

java.lang.IllegalArgumentException - If the columns are invalid, this exception is thrown.

name

public java.lang.String name()

Specified by:

name in interface Transform

Returns:

The name of the partitioning strategy.

arguments

public Expression[] arguments()

Specified by:

arguments in interface Transform

Returns:

The arguments of the partitioning strategy.