org.apache.gravitino.dto.rel

Class DistributionDTO

java.lang.Object

org.apache.gravitino.dto.rel.DistributionDTO

All Implemented Interfaces:

Distribution, Expression

public class DistributionDTO
extends java.lang.Object
implements Distribution

Data transfer object representing distribution information.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DistributionDTO.Builder Builder for DistributionDTO.

Field Summary

Fields

Modifier and Type	Field and Description
static DistributionDTO	NONE A DistributionDTO instance that represents no distribution.

Fields inherited from interface org.apache.gravitino.rel.expressions.Expression

EMPTY_EXPRESSION, EMPTY_NAMED_REFERENCE

Method Summary

Modifier and Type	Method and Description
FunctionArg[]	args() Returns the arguments of the function.
static DistributionDTO.Builder	builder() Creates a new instance of DistributionDTO.Builder.
boolean	equals(java.lang.Object o)
Expression[]	expressions() Returns the name of the distribution.
int	hashCode()
int	number() Returns the number of buckets.
Strategy	strategy() Returns the strategy of the distribution.
void	validate(ColumnDTO[] columns) Validates the distribution.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.gravitino.rel.expressions.distributions.Distribution

children, equals

Methods inherited from interface org.apache.gravitino.rel.expressions.Expression

references

Field Detail

NONE

public static final DistributionDTO NONE

A DistributionDTO instance that represents no distribution.

Method Detail

builder

public static DistributionDTO.Builder builder()

Creates a new instance of DistributionDTO.Builder.

Returns:

The new instance.

args

public FunctionArg[] args()

Returns the arguments of the function.

Returns:

The arguments of the function.

strategy

public Strategy strategy()

Returns the strategy of the distribution.

Specified by:

strategy in interface Distribution

Returns:

The strategy of the distribution.

number

public int number()

Returns the number of buckets.

Specified by:

number in interface Distribution

Returns:

The number of buckets.

expressions

public Expression[] expressions()

Returns the name of the distribution.

Specified by:

expressions in interface Distribution

Returns:

The name of the distribution.

validate

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

Validates the distribution.

Parameters:

columns - The columns to be validated.

Throws:

java.lang.IllegalArgumentException - If the distribution is invalid.

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object