Module pro.eng.yui.YuiFramework
Package pro.eng.yui.yuiframe.utils

Interface IObjectUtil

public interface IObjectUtil
Define common Object operations
Since:
1.0.0
Version:
1.0.0
Author:
yui-KITAMURA

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    equals(Object first, Object second)
    null-safe equality test.
    boolean
    isNotNull(Object obj)
    Check the object is NOT null
    boolean
    isNull(Object obj)
    Check the object is null
    boolean
    isTypeOf(Object instance, Class superClz)
    check the instance is extends or implements the class

  • Method Details

    • isNull

      @Contract("null -> true; !null -> false") boolean isNull(Object obj)
      Check the object is null
      Parameters:
      obj - check target instance or null value
      Returns:
      if the object is null then true

    • isNotNull

      @Contract("null -> false; !null -> true") boolean isNotNull(Object obj)
      Check the object is NOT null
      Parameters:
      obj - check target instance or null value
      Returns:
      if the object is NOT null then true

    • equals

      @Contract("null,null -> true; null,!null -> false; !null,null -> false; _,_ -> _") boolean equals(Object first, Object second)
      null-safe equality test. Almost same as first.equals(second), but safe to null.
      • null,null then true
      • null,NOT-null then false
      • NOT-null,null then false
      • NOT-null,NOT-null then same to Object.equals(Object)
      Parameters:
      first - first object
      second - second object
      Returns:
      almost same to Object.equals(Object). See the document body

    • isTypeOf

      @Contract("_,null -> fail; null,_ -> false; !null,!null -> _ ") boolean isTypeOf(Object instance, Class superClz)
      check the instance is extends or implements the class
      Parameters:
      instance - instance that to be checked
      superClz - expected super class or interface
      Returns:
      if the instance are the child of superClz then true
      See Also: