package
{
import flash.errors.IllegalOperationError;
import flash.utils.getDefinitionByName;
import flash.utils.getQualifiedClassName;
import flash.utils.getQualifiedSuperclassName;
public class AbstractClass
{
public function AbstractClass()
{
inspectAbstract();
}
private function inspectAbstract():void
{
var className : String = getQualifiedClassName(this);
if (getDefinitionByName(className) == AbstractClass)
{
throw new ArgumentError(
getQualifiedClassName(this) + "Class can not be instantiated.");
}
}
public function foo():void
{
throw new IllegalOperationError("Must override Concreate Class");
}
}
}
package
{
public class ConcreteClass extends AbstractClass
{
public function ConcreteClass()
{
super();
}
override public function foo() : void
{
trace("Implemented");
}
}
}
這是非常有益的,但它只有運行時錯誤..還有就是做這個檢查在編譯時的方法嗎? – 2009-10-08 15:08:01