Package info.ejava_student.starter.assignment3.aop.houserentals

Class NullValidatorHandler

java.lang.Object

info.ejava_student.starter.assignment3.aop.houserentals.NullValidatorHandler

public class NullValidatorHandler
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
private final List<String>	isNullProperties
private final String	methodName
private final List<String>	nonNullProperties
private final NullPropertyAssertion	nullPropertyAssertion
private final Object	target

Constructor Summary

Constructors

Constructor	Description
NullValidatorHandler()

Method Summary

Modifier and Type	Method	Description
Object	invoke(Object proxy, Method method, Object[] args)	Implement the handler method invoked by the dynamic proxy interpose.
static <T> T	newInstance(NullPropertyAssertion nullPropertyAssertion, T target, String methodName, List<String> nullProperties, List<String> nonNullProperties)	Creates a new dynamic interface proxy for target that will perform nullProperty assertion logic against provided objects for named methods.

Methods inherited from class java.lang.Object

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

Field Details

nullPropertyAssertion

private final NullPropertyAssertion nullPropertyAssertion

target

private final Object target

methodName

private final String methodName

isNullProperties

private final List<String> isNullProperties

nonNullProperties

private final List<String> nonNullProperties

Constructor Details

NullValidatorHandler

public NullValidatorHandler()

Method Details

invoke

public Object invoke(Object proxy,
 Method method,
 Object[] args)
              throws Throwable

Implement the handler method invoked by the dynamic proxy interpose.

Parameters:

proxy -

method - that was invoked by caller

args - to the method invoked, supplied by caller

Returns:

value returned from target.method() call if args valid

Throws:

ClientErrorException.InvalidInputException - if args not valid

Throwable

newInstance

public static <T> T newInstance(NullPropertyAssertion nullPropertyAssertion,
 T target,
 String methodName,
 List<String> nullProperties,
 List<String> nonNullProperties)

Creates a new dynamic interface proxy for target that will perform nullProperty assertion logic against provided objects for named methods.

Type Parameters:

T - target object type

Parameters:

nullPropertyAssertion - validator for handler to validate with

target - the object we are proxying

methodName - method for the handler to process

nullProperties - properties validated against isNull

nonNullProperties - properties validated against notNull

Returns:

dynamic proxy implementing same interfaces as target