Package com.alibaba.cola.exception

Class Assert

java.lang.Object

com.alibaba.cola.exception.Assert

public abstract class Assert
extends Object

Assertion utility class that assists in validating arguments.

Useful for identifying programmer errors early and clearly at runtime.

For example, if the contract of a public method states it does not allow null arguments, Assert can be used to validate that contract. For example:

 Assert.notNull(clazz, "The class must not be null");
 Assert.isTrue(i > 0, "The value must be greater than zero");

This class is empowered by org.springframework.util.Assert

Author:

Frank Zhang

Constructor Summary

Constructors

Constructor	Description
Assert()

Method Summary

Modifier and Type	Method	Description
static void	isFalse(boolean expression)
static void	isFalse(boolean expression, String errMessage)
static void	isFalse(boolean expression, String errorCode, String errMessage)	Assert a boolean expression, if expression is true, throwing BizException for example
static void	isTrue(boolean expression)
static void	isTrue(boolean expression, String errMessage)
static void	isTrue(boolean expression, String errorCode, String errMessage)	Assert a boolean expression, throwing BizException for example
static void	notEmpty(Collection<?> collection)
static void	notEmpty(Collection<?> collection, String errMessage)
static void	notEmpty(Collection<?> collection, String errorCode, String errMessage)
static void	notEmpty(Map<?,?> map)
static void	notEmpty(Map<?,?> map, String errMessage)
static void	notEmpty(Map<?,?> map, String errorCode, String errMessage)
static void	notNull(Object object)
static void	notNull(Object object, String errMessage)
static void	notNull(Object object, String errorCode, String errMessage)

Methods inherited from class java.lang.Object

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

Constructor Detail

Assert

public Assert()

Method Detail

isTrue

public static void isTrue(boolean expression,
                          String errorCode,
                          String errMessage)

Assert a boolean expression, throwing BizException for example

Assert.isTrue(i != 0, errorCode.B_ORDER_illegalNumber, "The order number can not be zero");

Parameters:

expression - a boolean expression

errorCode -

errMessage - the exception message to use if the assertion fails

Throws:

BizException - if expression is false

isFalse

public static void isFalse(boolean expression,
                           String errorCode,
                           String errMessage)

Assert a boolean expression, if expression is true, throwing BizException for example

Assert.isFalse(i == 0, errorCode.B_ORDER_illegalNumber, "The order number can not be zero");

This is more intuitive than isTure.

isTrue

public static void isTrue(boolean expression,
                          String errMessage)

isFalse

public static void isFalse(boolean expression,
                           String errMessage)

isTrue

public static void isTrue(boolean expression)

isFalse

public static void isFalse(boolean expression)

notNull

public static void notNull(Object object,
                           String errorCode,
                           String errMessage)

notNull

public static void notNull(Object object,
                           String errMessage)

notNull

public static void notNull(Object object)

notEmpty

public static void notEmpty(Collection<?> collection,
                            String errorCode,
                            String errMessage)

notEmpty

public static void notEmpty(Collection<?> collection,
                            String errMessage)

notEmpty

public static void notEmpty(Collection<?> collection)

notEmpty

public static void notEmpty(Map<?,?> map,
                            String errorCode,
                            String errMessage)

notEmpty

public static void notEmpty(Map<?,?> map,
                            String errMessage)

notEmpty

public static void notEmpty(Map<?,?> map)