com.alipay.sofa.jraft.util

类 Requires

java.lang.Object

com.alipay.sofa.jraft.util.Requires

public final class Requires
extends Object

Simple static methods to be called at the start of your own methods to verify correct arguments and state.

作者:

jiachun.fjc

方法概要

限定符和类型	方法和说明
static <T> T	requireNonNull(T obj) Checks that the specified object reference is not null.
static <T> T	requireNonNull(T obj, String message) Checks that the specified object reference is not null and throws a customized NullPointerException if it is.
static void	requireTrue(boolean expression) Ensures the truth of an expression involving one or more parameters to the calling method.
static void	requireTrue(boolean expression, Object message) Ensures the truth of an expression involving one or more parameters to the calling method.
static void	requireTrue(boolean expression, String fmt, Object... args) Ensures the truth of an expression involving one or more parameters to the calling method.

从类继承的方法 java.lang.Object

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

方法详细资料

requireNonNull

public static <T> T requireNonNull(T obj)

Checks that the specified object reference is not null.

类型参数:

T - the type of the reference

参数:

obj - the object reference to check for nullity

返回:

obj if not null

抛出:

NullPointerException - if obj is null

requireNonNull

public static <T> T requireNonNull(T obj,
                                   String message)

Checks that the specified object reference is not null and throws a customized NullPointerException if it is.

类型参数:

T - the type of the reference

参数:

obj - the object reference to check for nullity

message - detail message to be used in the event that a NullPointerException is thrown

返回:

obj if not null

抛出:

NullPointerException - if obj is null

requireTrue

public static void requireTrue(boolean expression)

Ensures the truth of an expression involving one or more parameters to the calling method.

参数:

expression - a boolean expression

抛出:

IllegalArgumentException - if expression is false

requireTrue

public static void requireTrue(boolean expression,
                               Object message)

Ensures the truth of an expression involving one or more parameters to the calling method.

参数:

expression - a boolean expression

message - the exception message to use if the check fails; will be converted to a string using String.valueOf(Object)

抛出:

IllegalArgumentException - if expression is false

requireTrue

public static void requireTrue(boolean expression,
                               String fmt,
                               Object... args)

Ensures the truth of an expression involving one or more parameters to the calling method.

参数:

expression - a boolean expression

fmt - the exception message with format string

args - arguments referenced by the format specifiers in the format string

抛出:

IllegalArgumentException - if expression is false