org.springframework.web.method.annotation
Class ExceptionHandlerMethodResolver

java.lang.Object
  org.springframework.web.method.annotation.ExceptionHandlerMethodResolver

public class ExceptionHandlerMethodResolver
extends Object

Given a set of @ExceptionHandler methods at initialization, finds the best matching method mapped to an exception at runtime.

Exception mappings are extracted from the method @ExceptionHandler annotation or by looking for Throwable method arguments.

Since:

3.1

Author:

Rossen Stoyanchev

Field Summary

static ReflectionUtils.MethodFilter

EXCEPTION_HANDLER_METHODS A filter for selecting @ExceptionHandler methods.

Constructor Summary

ExceptionHandlerMethodResolver(Class<?> handlerType)
A constructor that finds ExceptionHandler methods in a handler.

Method Summary

Method

resolveMethod(Exception exception) Find a method to handle the given exception.

Methods inherited from class java.lang.Object

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

Field Detail

EXCEPTION_HANDLER_METHODS

public static final ReflectionUtils.MethodFilter EXCEPTION_HANDLER_METHODS

A filter for selecting @ExceptionHandler methods.

Constructor Detail

ExceptionHandlerMethodResolver

public ExceptionHandlerMethodResolver(Class<?> handlerType)

A constructor that finds ExceptionHandler methods in a handler.

Parameters:

handlerType - the handler to inspect for exception handler methods.

Throws:

IllegalStateException - If an exception type is mapped to two methods.

IllegalArgumentException - If an @ExceptionHandler method is not mapped to any exceptions.

Method Detail

resolveMethod

public Method resolveMethod(Exception exception)

Find a method to handle the given exception. If more than one match is found, the best match is selected via ExceptionDepthComparator.

Parameters:

exception - the exception

Returns:

an @ExceptionHandler method, or null