org.springframework.messaging.handler.invocation

Class AbstractExceptionHandlerMethodResolver

java.lang.Object

org.springframework.messaging.handler.invocation.AbstractExceptionHandlerMethodResolver

Direct Known Subclasses:

AnnotationExceptionHandlerMethodResolver

public abstract class AbstractExceptionHandlerMethodResolver
extends Object

Cache exception handling method mappings and provide options to look up a method that should handle an exception. If multiple methods match, they are sorted using ExceptionDepthComparator and the top match is returned.

Since:

4.0

Author:

Rossen Stoyanchev, Juergen Hoeller

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractExceptionHandlerMethodResolver(Map<Class<? extends Throwable>,Method> mappedMethods) Protected constructor accepting exception-to-method mappings.

Method Summary

Modifier and Type	Method and Description
protected static List<Class<? extends Throwable>>	getExceptionsFromMethodSignature(Method method) Extract the exceptions this method handles.This implementation looks for sub-classes of Throwable in the method signature.
boolean	hasExceptionMappings() Whether the contained type has any exception mappings.
Method	resolveMethod(Throwable exception) Find a Method to handle the given exception.
Method	resolveMethodByExceptionType(Class<? extends Throwable> exceptionType) Find a Method to handle the given exception type.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractExceptionHandlerMethodResolver

protected AbstractExceptionHandlerMethodResolver(Map<Class<? extends Throwable>,Method> mappedMethods)

Protected constructor accepting exception-to-method mappings.

Method Detail

getExceptionsFromMethodSignature

protected static List<Class<? extends Throwable>> getExceptionsFromMethodSignature(Method method)

Extract the exceptions this method handles.This implementation looks for sub-classes of Throwable in the method signature. The method is static to ensure safe use from sub-class constructors.

hasExceptionMappings

public boolean hasExceptionMappings()

Whether the contained type has any exception mappings.

resolveMethod

@Nullable
public Method resolveMethod(Throwable exception)

Find a Method to handle the given exception. Use ExceptionDepthComparator if more than one match is found.

Parameters:

exception - the exception

Returns:

a Method to handle the exception, or null if none found

resolveMethodByExceptionType

@Nullable
public Method resolveMethodByExceptionType(Class<? extends Throwable> exceptionType)

Find a Method to handle the given exception type. This can be useful if an Exception instance is not available (e.g. for tools).

Parameters:

exceptionType - the exception type

Returns:

a Method to handle the exception, or null if none found

Since:

4.3.1