org.springframework.security.access.prepost

Class PreInvocationAuthorizationAdviceVoter

java.lang.Object

org.springframework.security.access.prepost.PreInvocationAuthorizationAdviceVoter

All Implemented Interfaces:

AccessDecisionVoter<org.aopalliance.intercept.MethodInvocation>

public class PreInvocationAuthorizationAdviceVoter
extends Object
implements AccessDecisionVoter<org.aopalliance.intercept.MethodInvocation>

Voter which performs the actions using a PreInvocationAuthorizationAdvice implementation generated from @PreFilter and @PreAuthorize annotations.

In practice, if these annotations are being used, they will normally contain all the necessary access control logic, so a voter-based system is not really necessary and a single AccessDecisionManager which contained the same logic would suffice. However, this class fits in readily with the traditional voter-based AccessDecisionManager implementations used by Spring Security.

Since:

3.0

Author:

Luke Taylor

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.commons.logging.Log	logger

Fields inherited from interface org.springframework.security.access.AccessDecisionVoter

ACCESS_ABSTAIN, ACCESS_DENIED, ACCESS_GRANTED

Constructor Summary

Constructors

Constructor and Description
PreInvocationAuthorizationAdviceVoter(PreInvocationAuthorizationAdvice pre)

Method Summary

Modifier and Type	Method and Description
boolean	supports(Class<?> clazz) Indicates whether the AccessDecisionVoter implementation is able to provide access control votes for the indicated secured object type.
boolean	supports(ConfigAttribute attribute) Indicates whether this AccessDecisionVoter is able to vote on the passed ConfigAttribute.
int	vote(Authentication authentication, org.aopalliance.intercept.MethodInvocation method, Collection<ConfigAttribute> attributes) Indicates whether or not access is granted.

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected final org.apache.commons.logging.Log logger

Constructor Detail

PreInvocationAuthorizationAdviceVoter

public PreInvocationAuthorizationAdviceVoter(PreInvocationAuthorizationAdvice pre)

Method Detail

supports

public boolean supports(ConfigAttribute attribute)

Description copied from interface: AccessDecisionVoter

Indicates whether this AccessDecisionVoter is able to vote on the passed ConfigAttribute.

This allows the AbstractSecurityInterceptor to check every configuration attribute can be consumed by the configured AccessDecisionManager and/or RunAsManager and/or AfterInvocationManager.

Specified by:

supports in interface AccessDecisionVoter<org.aopalliance.intercept.MethodInvocation>

Parameters:

attribute - a configuration attribute that has been configured against the AbstractSecurityInterceptor

Returns:

true if this AccessDecisionVoter can support the passed configuration attribute

supports

public boolean supports(Class<?> clazz)

Description copied from interface: AccessDecisionVoter

Indicates whether the AccessDecisionVoter implementation is able to provide access control votes for the indicated secured object type.

Specified by:

supports in interface AccessDecisionVoter<org.aopalliance.intercept.MethodInvocation>

Parameters:

clazz - the class that is being queried

Returns:

true if the implementation can process the indicated class

vote

public int vote(Authentication authentication,
                org.aopalliance.intercept.MethodInvocation method,
                Collection<ConfigAttribute> attributes)

Description copied from interface: AccessDecisionVoter

Indicates whether or not access is granted.

The decision must be affirmative (ACCESS_GRANTED), negative ( ACCESS_DENIED) or the AccessDecisionVoter can abstain ( ACCESS_ABSTAIN) from voting. Under no circumstances should implementing classes return any other value. If a weighting of results is desired, this should be handled in a custom AccessDecisionManager instead.

Unless an AccessDecisionVoter is specifically intended to vote on an access control decision due to a passed method invocation or configuration attribute parameter, it must return ACCESS_ABSTAIN. This prevents the coordinating AccessDecisionManager from counting votes from those AccessDecisionVoters without a legitimate interest in the access control decision.

Whilst the secured object (such as a MethodInvocation) is passed as a parameter to maximise flexibility in making access control decisions, implementing classes should not modify it or cause the represented invocation to take place (for example, by calling MethodInvocation.proceed()).

Specified by:

vote in interface AccessDecisionVoter<org.aopalliance.intercept.MethodInvocation>

Parameters:

authentication - the caller making the invocation

method - the secured object being invoked

attributes - the configuration attributes associated with the secured object

Returns:

either AccessDecisionVoter.ACCESS_GRANTED, AccessDecisionVoter.ACCESS_ABSTAIN or AccessDecisionVoter.ACCESS_DENIED