org.apache.struts.chain.commands
Class AbstractAuthorizeAction

java.lang.Object
  org.apache.struts.chain.commands.ActionCommandBase
      org.apache.struts.chain.commands.AbstractAuthorizeAction

All Implemented Interfaces:

org.apache.commons.chain.Command, ActionCommand

Direct Known Subclasses:

AuthorizeAction

public abstract class AbstractAuthorizeAction
extends ActionCommandBase

Determine whether the requested action is authorized for the current user. If not, abort chain processing and perferably, return an error message of some kind.

Version:

$Rev: 481115 $ $Date: 2005-11-12 13:01:44 -0500 (Sat, 12 Nov 2005) $

Field Summary

Fields inherited from interface org.apache.commons.chain.Command

CONTINUE_PROCESSING, PROCESSING_COMPLETE

Constructor Summary

AbstractAuthorizeAction()

Method Summary

boolean	execute(ActionContext actionCtx) Determine whether the requested action is authorized for the current user.
protected abstract java.lang.String	getErrorMessage(ActionContext context, ActionConfig actionConfig) Retrieve error message from context.
protected boolean	isAuthorizationRequired(ActionConfig actionConfig) Must authorization rules be consulted? The base implementation returns true if the given ActionConfig has one or more roles defined.
protected abstract boolean	isAuthorized(ActionContext context, java.lang.String[] roles, ActionConfig actionConfig) Determine if the action is authorized for the given roles.

Methods inherited from class org.apache.struts.chain.commands.ActionCommandBase

execute

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractAuthorizeAction

public AbstractAuthorizeAction()

Method Detail

execute

public boolean execute(ActionContext actionCtx)
                throws java.lang.Exception

Determine whether the requested action is authorized for the current user. If not, abort chain processing and perferably, return an error message of some kind.

Specified by:

execute in interface ActionCommand

Specified by:

execute in class ActionCommandBase

Parameters:

actionCtx - The Context for the current request

Returns:

false if the user is authorized for the selected action, else true to abort processing.

Throws:

UnauthorizedActionException - if authorization fails or if an error is encountered in the course of performing the authorization.

java.lang.Exception - On any error

isAuthorizationRequired

protected boolean isAuthorizationRequired(ActionConfig actionConfig)

Must authorization rules be consulted? The base implementation returns true if the given ActionConfig has one or more roles defined.

Parameters:

actionConfig - the current ActionConfig object

Returns:

true if the isAuthorized method should be consulted.

isAuthorized

protected abstract boolean isAuthorized(ActionContext context,
                                        java.lang.String[] roles,
                                        ActionConfig actionConfig)
                                 throws java.lang.Exception

Determine if the action is authorized for the given roles.

Parameters:

context - The Context for the current request

roles - An array of valid roles for this request

actionConfig - The current action mapping

Returns:

true if the request is authorized, else false

Throws:

UnauthorizedActionException - If the logic determines that the request is not authorized but does not wish to rely upon the default mechanism reporting the error.

java.lang.Exception - If the action cannot be tested for authorization

getErrorMessage

protected abstract java.lang.String getErrorMessage(ActionContext context,
                                                    ActionConfig actionConfig)

Retrieve error message from context.

Parameters:

context - The Context for the current request

actionConfig - The current action mapping

Returns:

error message