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 java.lang.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

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.Map<java.lang.Class<? extends java.lang.Throwable>,java.lang.reflect.Method>	exceptionLookupCache
private java.util.Map<java.lang.Class<? extends java.lang.Throwable>,java.lang.reflect.Method>	mappedMethods
private static java.lang.reflect.Method	NO_METHOD_FOUND

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
protected static java.util.List<java.lang.Class<? extends java.lang.Throwable>>	getExceptionsFromMethodSignature(java.lang.reflect.Method method) Extract the exceptions this method handles.This implementation looks for sub-classes of Throwable in the method signature.
private java.lang.reflect.Method	getMappedMethod(java.lang.Class<? extends java.lang.Exception> exceptionType) Return the method mapped to the given exception type or null.
boolean	hasExceptionMappings() Whether the contained type has any exception mappings.
java.lang.reflect.Method	resolveMethod(java.lang.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

NO_METHOD_FOUND

private static final java.lang.reflect.Method NO_METHOD_FOUND

mappedMethods

private final java.util.Map<java.lang.Class<? extends java.lang.Throwable>,java.lang.reflect.Method> mappedMethods

exceptionLookupCache

private final java.util.Map<java.lang.Class<? extends java.lang.Throwable>,java.lang.reflect.Method> exceptionLookupCache

Constructor Detail

AbstractExceptionHandlerMethodResolver

protected AbstractExceptionHandlerMethodResolver(java.util.Map<java.lang.Class<? extends java.lang.Throwable>,java.lang.reflect.Method> mappedMethods)

Protected constructor accepting exception-to-method mappings.

Method Detail

getExceptionsFromMethodSignature

protected static java.util.List<java.lang.Class<? extends java.lang.Throwable>> getExceptionsFromMethodSignature(java.lang.reflect.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

public java.lang.reflect.Method resolveMethod(java.lang.Exception 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

getMappedMethod

private java.lang.reflect.Method getMappedMethod(java.lang.Class<? extends java.lang.Exception> exceptionType)

Return the method mapped to the given exception type or null.