org.springframework.beans

## 接口 PropertyValues

- 所有已知实现类:
    MutablePropertyValues

      public interface PropertyValues

  Holder containing one or more `PropertyValue` objects, typically comprising one update for a specific target bean.
  从以下版本开始:
    13 May 2001
  作者:
    Rod Johnson, Juergen Hoeller
  另请参阅:
    `PropertyValue`

- - ### 方法概要

    所有方法 实例方法 抽象方法
    限定符和类型 | 方法和说明
    --- | ---
    `PropertyValues` | `changesSince(PropertyValues old)` Return the changes since the previous PropertyValues.
    `boolean` | `contains(String propertyName)` Is there a property value (or other processing entry) for this property?
    `PropertyValue` | `getPropertyValue(String propertyName)` Return the property value with the given name, if any.
    `PropertyValue[]` | `getPropertyValues()` Return an array of the PropertyValue objects held in this object.
    `boolean` | `isEmpty()` Does this holder not contain any PropertyValue objects at all?

- - ### 方法详细资料

    - #### getPropertyValues

          PropertyValue[] getPropertyValues()

      Return an array of the PropertyValue objects held in this object.

    - #### getPropertyValue

          @Nullable
          PropertyValue getPropertyValue(String propertyName)

      Return the property value with the given name, if any.
      参数:
        `propertyName` - the name to search for
      返回:
        the property value, or `null` if none

    - #### changesSince

          PropertyValues changesSince(PropertyValues old)

      Return the changes since the previous PropertyValues. Subclasses should also override `equals`.
      参数:
        `old` - old property values
      返回:
        the updated or new properties. Return empty PropertyValues if there are no changes.
      另请参阅:
        `Object.equals(java.lang.Object)`

    - #### contains

          boolean contains(String propertyName)

      Is there a property value (or other processing entry) for this property?
      参数:
        `propertyName` - the name of the property we're interested in
      返回:
        whether there is a property value for this property

    - #### isEmpty

          boolean isEmpty()

      Does this holder not contain any PropertyValue objects at all?