com.feilong.core.bean

Class PropertyValueObtainer

java.lang.Object

com.feilong.core.bean.PropertyValueObtainer

public final class PropertyValueObtainer
extends Object

属性值获取器.

Since:

1.12.0

Author:

feilong

Method Summary

Methods

Modifier and Type	Method and Description
static <T,O,K extends Collection<T>> K	getPropertyValueCollection(Iterable<O> beanIterable, String propertyName, K returnCollection) 循环beanIterable,调用 PropertyUtil.getProperty(Object, String) 获得 propertyName的值,塞到 returnCollection 中返回.
static <T,O> T	getValue(O obj, PropertyDescriptor propertyDescriptor) Gets the value.

Methods inherited from class java.lang.Object

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

Method Detail

getPropertyValueCollection

public static <T,O,K extends Collection<T>> K getPropertyValueCollection(Iterable<O> beanIterable,
                                                         String propertyName,
                                                         K returnCollection)

循环beanIterable,调用 PropertyUtil.getProperty(Object, String) 获得 propertyName的值,塞到 returnCollection 中返回.

Type Parameters:

T - the generic type

O - the generic type

K - the key type

Parameters:

beanIterable - 支持

• bean Iterable,比如List<User>,Set<User>等
• map Iterable,比如List<Map<String, String>>
• list Iterable , 比如 List<List<String>>
• 数组 Iterable ,比如 List<String[]>

propertyName - 泛型O对象指定的属性名称,Possibly indexed and/or nested name of the property to be modified,参见 propertyName

returnCollection - the return collection

Returns:

如果 returnCollection 是null,抛出 NullPointerException
如果 beanIterable 是null或者empty,返回 returnCollection
如果 propertyName 是null,抛出 NullPointerException
如果 propertyName 是blank,抛出 IllegalArgumentException

Since:

1.0.8

See Also:

PropertyUtil.getProperty(Object, String), BeanToPropertyValueTransformer

getValue

public static <T,O> T getValue(O obj,
               PropertyDescriptor propertyDescriptor)

Gets the value.

Type Parameters:

T - the generic type

O - the generic type

Parameters:

obj - the obj

propertyDescriptor - the property descriptor

Returns:

如果 obj 是null,抛出 NullPointerException
如果 propertyDescriptor 是null,抛出 NullPointerException

See Also:

PropertyUtil.getProperty(Object, String) 排序异常