com.vaadin.flow.server

Class VaadinServletContext

java.lang.Object

com.vaadin.flow.server.VaadinServletContext

All Implemented Interfaces:

VaadinContext, Serializable

public class VaadinServletContext
extends Object
implements VaadinContext

VaadinContext that goes with VaadinServletService.

Since:

14.0.0

Author:

miki

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
VaadinServletContext(javax.servlet.ServletContext context) Creates an instance of this context with given ServletContext.

Method Summary

Modifier and Type	Method and Description
<T> T	getAttribute(Class<T> type, Supplier<T> defaultValueSupplier) Returns value of the specified attribute, creating a default value if not present.
javax.servlet.ServletContext	getContext() Returns the underlying context.
void	removeAttribute(Class<?> clazz) Removes an attribute identified by the given type.
<T> void	setAttribute(T value) Sets the attribute value, overriding previously existing one.

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.VaadinContext

getAttribute

Constructor Detail

VaadinServletContext

public VaadinServletContext(javax.servlet.ServletContext context)

Creates an instance of this context with given ServletContext.

Parameters:

context - Context.

Method Detail

getContext

public javax.servlet.ServletContext getContext()

Returns the underlying context.

Returns:

A non-null ServletContext.

getAttribute

public <T> T getAttribute(Class<T> type,
                          Supplier<T> defaultValueSupplier)

Description copied from interface: VaadinContext

Returns value of the specified attribute, creating a default value if not present.

Specified by:

getAttribute in interface VaadinContext

Parameters:

type - Type of the attribute.

defaultValueSupplier - Supplier of the default value, called when there is no value already present. May be null.

Returns:

Value of the specified attribute.

setAttribute

public <T> void setAttribute(T value)

Description copied from interface: VaadinContext

Sets the attribute value, overriding previously existing one. Values are based on exact type, meaning only one attribute of given type is possible at any given time.

Specified by:

setAttribute in interface VaadinContext

Parameters:

value - Value of the attribute. May not be null.

See Also:

for removing attributes.

removeAttribute

public void removeAttribute(Class<?> clazz)

Description copied from interface: VaadinContext

Removes an attribute identified by the given type. If the attribute does not exist, no action will be taken.

Specified by:

removeAttribute in interface VaadinContext

Parameters:

clazz - Attribute type.

See Also:

for setting attributes.