org.springframework.webflow.engine
Enum History

java.lang.Object
  java.lang.Enum<History>
      org.springframework.webflow.engine.History

All Implemented Interfaces:

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

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

View state history policies.

Author:

Keith Donald

See Also:

ViewState

Enum Constant Summary

DISCARD
The history of the view state should be discarded when the view state exits to prevent back-tracking.

INVALIDATE
The history of the view state and all previous view state should be invalidated to completely restrict back tracking.

PRESERVE
The history of the view state should be preserved when the view state exits to support back-tracking.

Method Summary

static History	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static History[]	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

PRESERVE

public static final History PRESERVE

The history of the view state should be preserved when the view state exits to support back-tracking.

DISCARD

public static final History DISCARD

The history of the view state should be discarded when the view state exits to prevent back-tracking.

INVALIDATE

public static final History INVALIDATE

The history of the view state and all previous view state should be invalidated to completely restrict back tracking.

Method Detail

values

public static History[] 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 (History c : History.values())
    System.out.println(c);

Returns:

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

valueOf

public static History 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