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    <p>Spring Security 3 supports <code>@PreAuthorize</code> annotation that allows you to express authorization logic in <a href="http://static.springsource.org/spring/docs/3.0.0.M3/spring-framework-reference/html/ch07.html" rel="nofollow">Spring Expression Language</a>, like this:</p> <pre><code>public class BusinessService { @PreAuthorize("hasRole('ADMINISTRATOR') or " + "(#o.status != 'someStatus' and hasRole('USER') and #o.ownerName == principal.name)") public void updateBusinessObject(BusinessObject o) { ... } } </code></pre> <p>And you need <code>&lt;security:global-method-security pre-post-annotations="enabled"/&gt;</code> to apply security aspect.</p> <p>If the expression is too complex to represent in Spring Expression Language, you can move some logic to Java code by adding custom variables into expression's <a href="http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/expression/EvaluationContext.html" rel="nofollow"><code>EvaluationContext</code></a> (by customizing <a href="http://static.springsource.org/spring-security/site/docs/3.0.x/apidocs/org/springframework/security/access/expression/method/MethodSecurityExpressionHandler.html" rel="nofollow"><code>MethodSecurityExpressionHandler</code></a>).</p> <p>Note, however, that you need to have your code compiled in debug mode in order to use method arguments in the expression.</p> <p><strong>See also:</strong></p> <ul> <li><a href="http://static.springsource.org/spring-security/site/docs/3.0.x/reference/el-access.html#el-pre-post-annotations" rel="nofollow">15.3.1 @Pre and @Post Annotations</a></li> </ul>
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    1. POHow to use spring security3.0.3 to secure such business logic?
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    1. COThanks,that would be great.But I used this @PreAuthorize("hasRole('ROLE_ADMIN') or (#task.status < 3 and hasRole('ROLE_USER'))").It didn't work. I log in as owner of the task,the task's status==3,but I can still upate this task
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    2. CO@Tom: Make sure that security aspect is properly applied.
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    3. CO@Tom: Also note that since this approach uses Spring AOP, it works only for calls from outside of your class.
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