org.apache.flink.runtime.state

接口 PriorityComparator<T>

类型参数:

T - type of the compared objects.

函数接口:

这是一个函数接口, 因此可用作 lambda 表达式或方法引用的赋值目标。

@FunctionalInterface
public interface PriorityComparator<T>

This interface works similar to Comparable and is used to prioritize between two objects. The main difference between this interface and Comparable is it is not require to follow the usual contract between that Comparable.compareTo(Object) and Object.equals(Object). The contract of this interface is: When two objects are equal, they indicate the same priority, but indicating the same priority does not require that both objects are equal.

字段概要

字段

限定符和类型	字段和说明
static PriorityComparator<? extends PriorityComparable<Object>>	FOR_PRIORITY_COMPARABLE_OBJECTS

方法概要

限定符和类型	方法和说明
int	comparePriority(T left, T right) Compares two objects for priority.
static <T extends PriorityComparable<?>> PriorityComparator<T>	forPriorityComparableObjects()

字段详细资料

FOR_PRIORITY_COMPARABLE_OBJECTS

static final PriorityComparator<? extends PriorityComparable<Object>> FOR_PRIORITY_COMPARABLE_OBJECTS

方法详细资料

comparePriority

int comparePriority(T left,
                    T right)

Compares two objects for priority. Returns a negative integer, zero, or a positive integer as the first argument has lower, equal to, or higher priority than the second.

参数:

left - left operand in the comparison by priority.

right - left operand in the comparison by priority.

返回:

a negative integer, zero, or a positive integer as the first argument has lower, equal to, or higher priority than the second.

forPriorityComparableObjects

static <T extends PriorityComparable<?>> PriorityComparator<T> forPriorityComparableObjects()