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2012-05-04T14:46:48.660
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2015-11-12T19:12:00.287
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2015-11-12T19:12:00.287
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I would like to supplement Ralph's response about creating custom SpEL expression. His explanations helped very much on my attempt to find the right way to do this, but i think that they need to be extended. Here is a way on how to create custom SpEL expression: 1) Create custom subclass of WebSecurityExpressionRoot class. In this subclass create a new method which you will use in expression. For example: <pre><code>public class CustomWebSecurityExpressionRoot extends WebSecurityExpressionRoot { public CustomWebSecurityExpressionRoot(Authentication a, FilterInvocation fi) { super(a, fi); } public boolean yourCustomMethod() { boolean calculatedValue = ...; return calculatedValue; } }</code></pre> 2) Create custom subclass of DefaultWebSecurityExpressionHandler class and override method createSecurityExpressionRoot(Authentication authentication, FilterInvocation fi) (not createEvaluationContext(...)) in it to return your CustomWebSecurityExpressionRoot instance. For example: <pre><code>@Component(value="customExpressionHandler") public class CustomWebSecurityExpressionHandler extends DefaultWebSecurityExpressionHandler { @Override protected SecurityExpressionRoot createSecurityExpressionRoot( Authentication authentication, FilterInvocation fi) { WebSecurityExpressionRoot expressionRoot = new CustomWebSecurityExpressionRoot(authentication, fi); return expressionRoot; }}</code></pre> 3) Define in your spring-security.xml the reference to your expression handler bean <pre><code><security:http access-denied-page="/error403.jsp" use-expressions="true" auto-config="false"> ... <security:expression-handler ref="customExpressionHandler"/> </security:http> </code></pre> After this, you can use your own custom expression instead of the standard one: <pre><code><security:authorize access="yourCustomMethod()"> </code></pre>
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1. POCreating New Roles and Permissions Dynamically in Spring Security 3
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