me.alidg.errors.handlers

Class ConstraintViolationWebErrorHandler

java.lang.Object

me.alidg.errors.handlers.ConstraintViolationWebErrorHandler

All Implemented Interfaces:

WebErrorHandler

public class ConstraintViolationWebErrorHandler
extends Object
implements WebErrorHandler

A WebErrorHandler implementation responsible for handling ConstraintViolationExceptions from bean validation.

Author:

Ali Dehghani

Constructor Summary

Constructors

Constructor and Description
ConstraintViolationWebErrorHandler()

Method Summary

Modifier and Type	Method and Description
boolean	canHandle(Throwable exception) Only can handle ConstraintViolationExceptions that contains at least one ConstraintViolation.
HandledException	handle(Throwable exception) Handles the given ConstraintViolationExceptions by extracting the error codes from the message templates and also, extracting the arguments from ConstraintDescriptors.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstraintViolationWebErrorHandler

public ConstraintViolationWebErrorHandler()

Method Detail

canHandle

public boolean canHandle(Throwable exception)

Only can handle ConstraintViolationExceptions that contains at least one ConstraintViolation.

Specified by:

canHandle in interface WebErrorHandler

Parameters:

exception - The exception to examine.

Returns:

true if the exception is a ConstraintViolationException with at least one violation, false otherwise.

handle

@Nonnull
public HandledException handle(Throwable exception)

Handles the given ConstraintViolationExceptions by extracting the error codes from the message templates and also, extracting the arguments from ConstraintDescriptors.

Constraint Descriptor

All annotation attributes defined in a constrain annotation, e.g. Size, can be extracted from the ConstraintDescriptor.getAttributes() method. The specification of the Bean Validation API demands, that any constraint annotation must define three mandatory attributes, message, groups and payload. Since these three attributes are not that valuable as arguments, we're not going to expose them.

Specified by:

handle in interface WebErrorHandler

Parameters:

exception - The exception to handle.

Returns:

The handled exception