com.vaadin.flow.server.startup

Class WebComponentExporterAwareValidator

java.lang.Object

com.vaadin.flow.server.startup.AbstractAnnotationValidator

com.vaadin.flow.server.startup.WebComponentExporterAwareValidator

All Implemented Interfaces:

ClassLoaderAwareServletContainerInitializer, Serializable

public class WebComponentExporterAwareValidator
extends AbstractAnnotationValidator
implements ClassLoaderAwareServletContainerInitializer

Checks that specific annotations are not configured wrong.

The validation is run during servlet container initialization.

For internal use only. May be renamed or removed in a future release.

Since:

2.0

Author:

Vaadin Ltd.

See Also:

Serialized Form

Field Summary

Fields inherited from class com.vaadin.flow.server.startup.AbstractAnnotationValidator

ERROR_MESSAGE_BEGINNING, MIDDLE_ROUTER_LAYOUT, NON_PARENT, NON_PARENT_ALIAS, NON_ROUTER_LAYOUT

Constructor Summary

Constructors

Constructor and Description
WebComponentExporterAwareValidator()

Method Summary

Modifier and Type	Method and Description
List<Class<?>>	getAnnotations() Gets the annotations that are subject to validate.
protected String	getErrorHint() Returns a hint for the discovered validation errors.
protected Optional<String>	handleNonRouterLayout(Class<?> clazz) Handles the clazz which is not a top level route and not a router layout.
void	process(Set<Class<?>> classSet, ServletContext servletContext) Implement this method instead of ClassLoaderAwareServletContainerInitializer.onStartup(Set, ServletContext) to handle classes accessible by different classloaders.

Methods inherited from class com.vaadin.flow.server.startup.AbstractAnnotationValidator

getClassAnnotations, validateClasses

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.vaadin.flow.server.startup.ClassLoaderAwareServletContainerInitializer

onStartup, requiresLookup

Constructor Detail

WebComponentExporterAwareValidator

public WebComponentExporterAwareValidator()

Method Detail

process

public void process(Set<Class<?>> classSet,
                    ServletContext servletContext)
             throws ServletException

Description copied from interface: ClassLoaderAwareServletContainerInitializer

Implement this method instead of ClassLoaderAwareServletContainerInitializer.onStartup(Set, ServletContext) to handle classes accessible by different classloaders.

Specified by:

process in interface ClassLoaderAwareServletContainerInitializer

Parameters:

classSet - the Set of application classes that extend, implement, or have been annotated with the class types specified by the HandlesTypes annotation, or null if there are no matches, or this ServletContainerInitializer has not been annotated with HandlesTypes

servletContext - the ServletContext of the web application that is being started and in which the classes contained in c were found

Throws:

ServletException - if an error has occurred

See Also:

ClassLoaderAwareServletContainerInitializer.onStartup(Set, ServletContext)

handleNonRouterLayout

protected Optional<String> handleNonRouterLayout(Class<?> clazz)

Description copied from class: AbstractAnnotationValidator

Handles the clazz which is not a top level route and not a router layout. Returns an optional message which describes the error having an annotation for the class.

Overrides:

handleNonRouterLayout in class AbstractAnnotationValidator

Parameters:

clazz - class to validate annotations

Returns:

an optional error message or empty if there is no error

getErrorHint

protected String getErrorHint()

Description copied from class: AbstractAnnotationValidator

Returns a hint for the discovered validation errors.

Overrides:

getErrorHint in class AbstractAnnotationValidator

Returns:

the error hint

getAnnotations

public List<Class<?>> getAnnotations()

Description copied from class: AbstractAnnotationValidator

Gets the annotations that are subject to validate.

Specified by:

getAnnotations in class AbstractAnnotationValidator

Returns:

a list of target annotations