com.xphsc.easyjdbc.util

类 Assert

java.lang.Object

com.xphsc.easyjdbc.util.Assert

public class Assert
extends Object

Created by ${huipei.x}

构造器概要

构造器

构造器和说明
Assert()

方法概要

限定符和类型	方法和说明
static void	doesNotContain(String textToSearch, String substring, String message) Assert that the given text does not contain the given substring.
static void	hasLength(String text, String message) Assert that the given String is not empty; that is, it must not be null and not the empty String.
static void	hasText(String text, String message)
static void	isAssignable(Class<?> superType, Class<?> subType) Assert that superType.isAssignableFrom(subType) is true.
static void	isAssignable(Class<?> superType, Class<?> subType, String message) Assert that superType.isAssignableFrom(subType) is true.
static void	isInstanceOf(Class<?> type, Object obj) Assert that the provided object is an instance of the provided class.
static void	isInstanceOf(Class<?> type, Object obj, String message) Assert that the provided object is an instance of the provided class.
static void	isNull(Object object, String message) Assert that an object is null.
static void	isTrue(boolean expression, String message) Assert a boolean expression, throwing an IllegalArgumentException if the expression evaluates to false.
static void	noNullElements(Object[] array, String message) Assert that an array contains no null elements.
static void	notEmpty(Collection<?> collection, String message) Assert that a collection contains elements; that is, it must not be null and must contain at least one element.
static void	notEmpty(Map<?,?> map, String message) Assert that a Map contains entries; that is, it must not be null and must contain at least one entry.
static void	notEmpty(Object[] array, String message) Assert that an array contains elements; that is, it must not be null and must contain at least one element.
static void	notNull(Object object, String message) Assert that an object is not null.
static void	state(boolean expression, String message) Assert a boolean expression, throwing an IllegalStateException if the expression evaluates to false.

从类继承的方法 java.lang.Object

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

构造器详细资料

Assert

public Assert()

方法详细资料

state

public static void state(boolean expression,
                         String message)

Assert a boolean expression, throwing an IllegalStateException if the expression evaluates to false.

Call isTrue(boolean, java.lang.String) if you wish to throw an IllegalArgumentException on an assertion failure.

Assert.state(id == null, "The id property must not already be initialized");

参数:

expression - a boolean expression

message - the exception message to use if the assertion fails

抛出:

IllegalStateException - if expression is false

isTrue

public static void isTrue(boolean expression,
                          String message)

Assert a boolean expression, throwing an IllegalArgumentException if the expression evaluates to false.

Assert.isTrue(i > 0, "The value must be greater than zero");

参数:

expression - a boolean expression

message - the exception message to use if the assertion fails

抛出:

IllegalArgumentException - if expression is false

isNull

public static void isNull(Object object,
                          String message)

Assert that an object is null.

Assert.isNull(value, "The value must be null");

参数:

object - the object to check

message - the exception message to use if the assertion fails

抛出:

IllegalArgumentException - if the object is not null

notNull

public static void notNull(Object object,
                           String message)

Assert that an object is not null.

Assert.notNull(clazz, "The class must not be null");

参数:

object - the object to check

message - the exception message to use if the assertion fails

抛出:

IllegalArgumentException - if the object is null

hasLength

public static void hasLength(String text,
                             String message)

Assert that the given String is not empty; that is, it must not be null and not the empty String.

Assert.hasLength(name, "Name must not be empty");

参数:

text - the String to check

message - the exception message to use if the assertion fails

抛出:

IllegalArgumentException - if the text is empty

另请参阅:

StringUtil.hasLength(java.lang.CharSequence)

hasText

public static void hasText(String text,
                           String message)

doesNotContain

public static void doesNotContain(String textToSearch,
                                  String substring,
                                  String message)

Assert that the given text does not contain the given substring.

Assert.doesNotContain(name, "rod", "Name must not contain 'rod'");

参数:

textToSearch - the text to search

substring - the substring to find within the text

message - the exception message to use if the assertion fails

抛出:

IllegalArgumentException - if the text contains the substring

notEmpty

public static void notEmpty(Object[] array,
                            String message)

Assert that an array contains elements; that is, it must not be null and must contain at least one element.

Assert.notEmpty(array, "The array must contain elements");

参数:

array - the array to check

message - the exception message to use if the assertion fails

抛出:

IllegalArgumentException - if the object array is null or contains no elements

noNullElements

public static void noNullElements(Object[] array,
                                  String message)

Assert that an array contains no null elements.

Note: Does not complain if the array is empty!

Assert.noNullElements(array, "The array must contain non-null elements");

参数:

array - the array to check

message - the exception message to use if the assertion fails

抛出:

IllegalArgumentException - if the object array contains a null element

notEmpty

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

Assert that a collection contains elements; that is, it must not be null and must contain at least one element.

Assert.notEmpty(collection, "Collection must contain elements");

参数:

collection - the collection to check

message - the exception message to use if the assertion fails

抛出:

IllegalArgumentException - if the collection is null or contains no elements

notEmpty

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

Assert that a Map contains entries; that is, it must not be null and must contain at least one entry.

Assert.notEmpty(map, "Map must contain entries");

参数:

map - the map to check

message - the exception message to use if the assertion fails

抛出:

IllegalArgumentException - if the map is null or contains no entries

isInstanceOf

public static void isInstanceOf(Class<?> type,
                                Object obj,
                                String message)

Assert that the provided object is an instance of the provided class.

Assert.instanceOf(Foo.class, foo, "Foo expected");

参数:

type - the type to check against

obj - the object to check

message - a message which will be prepended to provide further context. If it is empty or ends in ":" or ";" or "," or ".", a full exception message will be appended. If it ends in a space, the name of the offending object's type will be appended. In any other case, a ":" with a space and the name of the offending object's type will be appended.

抛出:

IllegalArgumentException - if the object is not an instance of type

isInstanceOf

public static void isInstanceOf(Class<?> type,
                                Object obj)

Assert that the provided object is an instance of the provided class.

Assert.instanceOf(Foo.class, foo);

参数:

type - the type to check against

obj - the object to check

抛出:

IllegalArgumentException - if the object is not an instance of type

isAssignable

public static void isAssignable(Class<?> superType,
                                Class<?> subType,
                                String message)

Assert that superType.isAssignableFrom(subType) is true.

Assert.isAssignable(Number.class, myClass, "Number expected");

参数:

superType - the super type to check against

subType - the sub type to check

message - a message which will be prepended to provide further context. If it is empty or ends in ":" or ";" or "," or ".", a full exception message will be appended. If it ends in a space, the name of the offending sub type will be appended. In any other case, a ":" with a space and the name of the offending sub type will be appended.

抛出:

IllegalArgumentException - if the classes are not assignable

isAssignable

public static void isAssignable(Class<?> superType,
                                Class<?> subType)

Assert that superType.isAssignableFrom(subType) is true.

Assert.isAssignable(Number.class, myClass);

参数:

superType - the super type to check

subType - the sub type to check

抛出:

IllegalArgumentException - if the classes are not assignable