Package jakarta.servlet

Enum DispatcherType

java.lang.Object

java.lang.Enum<DispatcherType>

jakarta.servlet.DispatcherType

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<DispatcherType>

public enum DispatcherType
extends java.lang.Enum<DispatcherType>

Enumeration of dispatcher types. Used both to define filter mappings and by Servlets to determine why they were called.

Since:

Servlet 3.0

Enum Constant Summary

Enum Constants

Enum Constant	Description
ASYNC	AsyncContext.dispatch(), AsyncContext.dispatch(String) and AsyncContext.addListener(AsyncListener, ServletRequest, ServletResponse)
ERROR	When the container has passed processing to the error handler mechanism such as a defined error page.
FORWARD	RequestDispatcher.forward(ServletRequest, ServletResponse)
INCLUDE	RequestDispatcher.include(ServletRequest, ServletResponse)
REQUEST	Normal (non-dispatched) requests.

Method Summary

Modifier and Type	Method	Description
static DispatcherType	valueOf(java.lang.String name)	Returns the enum constant of this type with the specified name.
static DispatcherType[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

FORWARD

public static final DispatcherType FORWARD

RequestDispatcher.forward(ServletRequest, ServletResponse)

INCLUDE

public static final DispatcherType INCLUDE

RequestDispatcher.include(ServletRequest, ServletResponse)

REQUEST

public static final DispatcherType REQUEST

Normal (non-dispatched) requests.

ASYNC

public static final DispatcherType ASYNC

AsyncContext.dispatch(), AsyncContext.dispatch(String) and AsyncContext.addListener(AsyncListener, ServletRequest, ServletResponse)

ERROR

public static final DispatcherType ERROR

When the container has passed processing to the error handler mechanism such as a defined error page.

Method Detail

values

public static DispatcherType[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (DispatcherType c : DispatcherType.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static DispatcherType valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null