com.yahoo.bullet.querying.aggregations.grouping

Class GroupOperation

java.lang.Object

com.yahoo.bullet.querying.aggregations.grouping.GroupOperation

All Implemented Interfaces:

Serializable

public class GroupOperation
extends Object
implements Serializable

This class captures an operation that will be performed on an entire group - counts, sums, mins etc. Other than count, all other operations include a field name on which the operation is applied.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	GroupOperation.GroupOperationType
static interface	GroupOperation.GroupOperator

Field Summary

Fields

Modifier and Type	Field and Description
static GroupOperation.GroupOperator	COUNT
static GroupOperation.GroupOperator	MAX
static GroupOperation.GroupOperator	MIN
static Map<GroupOperation.GroupOperationType,GroupOperation.GroupOperator>	OPERATORS
static GroupOperation.GroupOperator	SUM
static Set<GroupOperation.GroupOperationType>	SUPPORTED_GROUP_OPERATIONS

Constructor Summary

Constructors

Constructor and Description
GroupOperation(GroupOperation.GroupOperationType type, String field, String name) Constructor that creates a group operation.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object object)
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

MIN

public static final GroupOperation.GroupOperator MIN

MAX

public static final GroupOperation.GroupOperator MAX

SUM

public static final GroupOperation.GroupOperator SUM

COUNT

public static final GroupOperation.GroupOperator COUNT

OPERATORS

public static final Map<GroupOperation.GroupOperationType,GroupOperation.GroupOperator> OPERATORS

SUPPORTED_GROUP_OPERATIONS

public static final Set<GroupOperation.GroupOperationType> SUPPORTED_GROUP_OPERATIONS

Constructor Detail

GroupOperation

public GroupOperation(GroupOperation.GroupOperationType type,
                      String field,
                      String name)

Constructor that creates a group operation.

Parameters:

type - The non-null type of the group operation.

field - The field of the group operation. Can be null for COUNT operation.

name - The name of the group operation. Can be null for COUNT_FIELD operation.

Method Detail

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object object)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object