Package org.eclipse.nebula.widgets.compositetable.internal

Class DuckType

java.lang.Object
org.eclipse.nebula.widgets.compositetable.internal.DuckType
All Implemented Interfaces:
java.lang.reflect.InvocationHandler
Direct Known Subclasses:
RelaxedDuckType
public class DuckType
extends java.lang.Object
implements java.lang.reflect.InvocationHandler
DuckType. Implements Duck Typing for Java. ("If it walks like a duck, quacks like a duck, it..."). Essentially allows programs to treat objects from separate hierarchies as if they were designed with common interfaces as long as they adhere to common naming conventions.

This version is the strict DuckType. All methods present in interfaceToImplement must be present on the target object.

  • Nested Class Summary

    Nested Classes 
    Modifier and Type Class Description
    static interface  DuckType.Wrapper
    Interface DuckType#Wrapper.

  • Field Summary

    Fields 
    Modifier and Type Field Description
    protected java.lang.Object object  
    protected java.lang.Class objectClass  

  • Constructor Summary

    Constructors 
    Modifier Constructor Description
    protected DuckType​(java.lang.Object object)  

  • Method Summary

    Modifier and Type Method Description
    boolean equals​(java.lang.Object obj)  
    int hashCode()  
    static java.lang.Object implement​(java.lang.Class interfaceToImplement, java.lang.Object object)
    Causes object to implement the interfaceToImplement and returns an instance of the object implementing interfaceToImplement even if interfaceToImplement was not declared in object.getClass()'s implements declaration.
    static boolean instanceOf​(java.lang.Class intrface, java.lang.Object object)
    Indicates if object is a (DuckType) instace of intrface.
    java.lang.Object invoke​(java.lang.Object proxy, java.lang.reflect.Method method, java.lang.Object[] args)  

    Methods inherited from class java.lang.Object

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

  • Field Details

    • object

      protected java.lang.Object object

    • objectClass

      protected java.lang.Class objectClass

  • Constructor Details

    • DuckType

      protected DuckType​(java.lang.Object object)

  • Method Details

    • implement

      public static java.lang.Object implement​(java.lang.Class interfaceToImplement, java.lang.Object object)
      Causes object to implement the interfaceToImplement and returns an instance of the object implementing interfaceToImplement even if interfaceToImplement was not declared in object.getClass()'s implements declaration.

      This works as long as all methods declared in interfaceToImplement are present on object.

      Parameters:
      interfaceToImplement - The Java class of the interface to implement
      object - The object to force to implement interfaceToImplement
      Returns:
      object, but now implementing interfaceToImplement

    • instanceOf

      public static boolean instanceOf​(java.lang.Class intrface, java.lang.Object object)
      Indicates if object is a (DuckType) instace of intrface. That is, is every method in intrface present on object.
      Parameters:
      intrface - The interface to implement
      object - The object to test
      Returns:
      true if every method in intrface is present on object. false otherwise

    • invoke

      public java.lang.Object invoke​(java.lang.Object proxy, java.lang.reflect.Method method, java.lang.Object[] args) throws java.lang.Throwable
      Specified by:
      invoke in interface java.lang.reflect.InvocationHandler
      Throws:
      java.lang.Throwable

    • equals

      public boolean equals​(java.lang.Object obj)
      Overrides:
      equals in class java.lang.Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class java.lang.Object