Package com.vaadin.flow.spring

Class SpringInstantiator

java.lang.Object

com.vaadin.flow.di.DefaultInstantiator

com.vaadin.flow.spring.SpringInstantiator

All Implemented Interfaces:

Instantiator, Serializable

public class SpringInstantiator
extends 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	Description
SpringInstantiator(VaadinService service, org.springframework.context.ApplicationContext context)	Creates a new spring instantiator instance.

Method Summary

Modifier and Type	Method	Description
<T extends Component> T	createComponent(Class<T> componentClass)
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.
Stream<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, getBootstrapListeners, getDependencyFilters, getIndexHtmlRequestListeners

Constructor Detail

SpringInstantiator

public SpringInstantiator(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 Stream<VaadinServiceInitListener> getServiceInitListeners()

Specified by:

getServiceInitListeners in interface Instantiator

Overrides:

getServiceInitListeners in class DefaultInstantiator

createComponent

public <T extends Component> T createComponent(Class<T> componentClass)

Specified by:

createComponent in interface Instantiator

Overrides:

createComponent in class DefaultInstantiator

getI18NProvider

public I18NProvider getI18NProvider()

Specified by:

getI18NProvider in interface Instantiator

Overrides:

getI18NProvider in class 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 Instantiator

Overrides:

getOrCreate in class DefaultInstantiator