com.vaadin.flow.spring

Class SpringInstantiator

java.lang.Object

com.vaadin.flow.di.DefaultInstantiator

com.vaadin.flow.spring.SpringInstantiator

All Implemented Interfaces:

com.vaadin.flow.di.Instantiator, Serializable

public class SpringInstantiator
extends com.vaadin.flow.di.DefaultInstantiator

Default Spring instantiator that is used if no other instantiator has been registered. This implementation uses Spring beans.

Author:

Vaadin Ltd

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SpringInstantiator(com.vaadin.flow.server.VaadinService service, org.springframework.context.ApplicationContext context) Creates a new spring instantiator instance.

Method Summary

Modifier and Type	Method and Description
<T extends com.vaadin.flow.component.Component> T	createComponent(Class<T> componentClass)
com.vaadin.flow.i18n.I18NProvider	getI18NProvider()
<T> T	getOrCreate(Class<T> type) Hands over an existing bean or tries to instantiate one with the following rules: If exactly one bean is present in the context, it returns this bean.
java.util.stream.Stream<com.vaadin.flow.server.VaadinServiceInitListener>	getServiceInitListeners()

Methods inherited from class com.vaadin.flow.di.DefaultInstantiator

getServiceLoaderListeners, init

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.di.Instantiator

createRouteTarget, get, getBootstrapListeners, getDependencyFilters

Constructor Detail

SpringInstantiator

public SpringInstantiator(com.vaadin.flow.server.VaadinService service,
                          org.springframework.context.ApplicationContext context)

Creates a new spring instantiator instance.

Parameters:

service - the service to use

context - the application context

Method Detail

getServiceInitListeners

public java.util.stream.Stream<com.vaadin.flow.server.VaadinServiceInitListener> getServiceInitListeners()

Specified by:

getServiceInitListeners in interface com.vaadin.flow.di.Instantiator

Overrides:

getServiceInitListeners in class com.vaadin.flow.di.DefaultInstantiator

createComponent

public <T extends com.vaadin.flow.component.Component> T createComponent(Class<T> componentClass)

Specified by:

createComponent in interface com.vaadin.flow.di.Instantiator

Overrides:

createComponent in class com.vaadin.flow.di.DefaultInstantiator

getI18NProvider

public com.vaadin.flow.i18n.I18NProvider getI18NProvider()

Specified by:

getI18NProvider in interface com.vaadin.flow.di.Instantiator

Overrides:

getI18NProvider in class com.vaadin.flow.di.DefaultInstantiator

getOrCreate

public <T> T getOrCreate(Class<T> type)

Hands over an existing bean or tries to instantiate one with the following rules:

• If exactly one bean is present in the context, it returns this bean.
• If no bean is present, it tries to instantiate one.
• If more than one bean is present, it tries to instantiate one but in case of a Bean instantiation exception this exception is catched and rethrown with a hint. Reason for this is, that users may expect it to "use" a bean but have multiple in the context. So the hint helps them find the problem.

Specified by:

getOrCreate in interface com.vaadin.flow.di.Instantiator

Overrides:

getOrCreate in class com.vaadin.flow.di.DefaultInstantiator