eu.bandm.tools.util

Class DynamicRewriter<C>

java.lang.Object

eu.bandm.tools.util.DynamicRewriter<C>

public abstract class DynamicRewriter<C>
extends Object

An abstract base class for reflection-based type case distinctions. Subclasses should overload the rewrite(java.lang.Class<R>, C, boolean) method with a method B rewrite(A x) to match objects of class A, and replace them by objects of class B. Methods of subclasses will only be considered as matches for an input if they have

• public access to be retrieved with Class.getMethod(java.lang.String, java.lang.Class<?>...)
• the name rewrite, and
• exactly one parameter of a subclass of C.

Constructor Summary

Constructors

Constructor and Description
DynamicRewriter()

Method Summary

Modifier and Type	Method and Description
<R> R	rewrite(Class<R> targetClass, C x, boolean total) Finds the best-matching rewrite method for the dynamic type of a given object and invokes it.

Methods inherited from class java.lang.Object

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

Constructor Detail

DynamicRewriter

public DynamicRewriter()

Method Detail

rewrite

public <R> R rewrite(Class<R> targetClass,
                     C x,
                     boolean total)

Finds the best-matching rewrite method for the dynamic type of a given object and invokes it.

Parameters:

targetClass - the expected class of the result.

x - the input object.

total - if true and x is null or no match is found, then x is cast to the class targetClass and returned.

Throws:

IllegalArgumentException - if the matching method throws an exception or cannot be invoked for some reason, or if total is false and no match is found.

ClassCastException - if the result cannot be cast to the class targetClass.

NullPointerException - if total is false and x is null.