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, Sam Brannen

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.
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 subclasses of Throwable in the method signature.

The method is static to ensure safe use from subclass 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.

Uses 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).

Uses ExceptionDepthComparator if more than one match is found.

Parameters:

exceptionType - the exception type

Returns:

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

Since:

4.3.1