SEC-1723: Use standard SpEL syntax for accessing beans in the app context by name.

core/src/main/java/org/springframework/security/access/expression/AbstractSecurityExpressionHandler.java

@@ -2,6 +2,8 @@ package org.springframework.security.access.expression;
 
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
+import org.springframework.context.expression.BeanFactoryResolver;
+import org.springframework.expression.BeanResolver;
 import org.springframework.expression.EvaluationContext;
 import org.springframework.expression.ExpressionParser;
 import org.springframework.expression.spel.standard.SpelExpressionParser;
@@ -21,7 +23,7 @@ import org.springframework.security.core.Authentication;
 public abstract class AbstractSecurityExpressionHandler<T> implements SecurityExpressionHandler<T>, ApplicationContextAware {
     private final AuthenticationTrustResolver trustResolver = new AuthenticationTrustResolverImpl();
     private final ExpressionParser expressionParser = new SpelExpressionParser();
-    private ApplicationContextPropertyAccessor sxrpa = new ApplicationContextPropertyAccessor(null);
+    private BeanResolver br;
     private RoleHierarchy roleHierarchy;
 
     public final ExpressionParser getExpressionParser() {
@@ -42,7 +44,7 @@ public abstract class AbstractSecurityExpressionHandler<T> implements SecurityEx
         root.setTrustResolver(trustResolver);
         root.setRoleHierarchy(roleHierarchy);
         StandardEvaluationContext ctx = createEvaluationContextInternal(authentication, invocation);
-        ctx.addPropertyAccessor(sxrpa);
+        ctx.setBeanResolver(br);
         ctx.setRootObject(root);
 
         return ctx;
@@ -76,6 +78,6 @@ public abstract class AbstractSecurityExpressionHandler<T> implements SecurityEx
     }
 
     public void setApplicationContext(ApplicationContext applicationContext) {
-        sxrpa = new ApplicationContextPropertyAccessor(applicationContext);
+        br = new BeanFactoryResolver(applicationContext);
     }
 }

core/src/main/java/org/springframework/security/access/expression/ApplicationContextPropertyAccessor.java

@@ -1,42 +0,0 @@
-package org.springframework.security.access.expression;
-
-import org.springframework.context.ApplicationContext;
-import org.springframework.expression.AccessException;
-import org.springframework.expression.EvaluationContext;
-import org.springframework.expression.PropertyAccessor;
-import org.springframework.expression.TypedValue;
-
-/**
- * General property accessor which resolves properties as bean names within an {@code ApplicationContext}.
- */
-final class ApplicationContextPropertyAccessor implements PropertyAccessor {
-    private final ApplicationContext ctx;
-
-    ApplicationContextPropertyAccessor(ApplicationContext ctx) {
-        this.ctx = ctx;
-    }
-
-    public boolean canRead(EvaluationContext context, Object target, String name) throws AccessException {
-        if (ctx == null) {
-            return false;
-        }
-
-        return ctx.containsBean(name);
-    }
-
-    public TypedValue read(EvaluationContext context, Object target, String name) throws AccessException {
-        return new TypedValue(ctx.getBean(name));
-    }
-
-    public boolean canWrite(EvaluationContext context, Object target, String name) throws AccessException {
-        return false;
-    }
-
-    public void write(EvaluationContext context, Object target, String name, Object newValue) throws AccessException {
-    }
-
-    public Class[] getSpecificTargetClasses() {
-        return null;
-    }
-
-}

core/src/test/java/org/springframework/security/access/annotation/ExpressionProtectedBusinessServiceImpl.java

@@ -45,7 +45,7 @@ public class ExpressionProtectedBusinessServiceImpl implements BusinessService {
         return someArray;
     }
 
-    @PreAuthorize("#x == 'x' and number.intValue() == 1294 ")
+    @PreAuthorize("#x == 'x' and @number.intValue() == 1294 ")
     public void methodWithBeanNamePropertyAccessExpression(String x) {
 
     }

core/src/test/java/org/springframework/security/access/expression/AbstractSecurityExpressionHandlerTests.java

@@ -0,0 +1,53 @@
+package org.springframework.security.access.expression;
+
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.mock;
+
+import org.junit.*;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.expression.Expression;
+import org.springframework.security.core.Authentication;
+
+import java.util.*;
+
+/**
+ * @author Luke Taylor
+ */
+public class AbstractSecurityExpressionHandlerTests {
+    private AbstractSecurityExpressionHandler<Object> handler;
+
+    @Before
+    public void setUp() throws Exception {
+        handler = new AbstractSecurityExpressionHandler<Object>() {
+            @Override
+            protected SecurityExpressionRoot createSecurityExpressionRoot(Authentication authentication, Object o) {
+                return new SecurityExpressionRoot(authentication) {};
+            }
+        };
+    }
+
+    @Test
+    public void beanNamesAreCorrectlyResolved() throws Exception {
+        handler.setApplicationContext(new AnnotationConfigApplicationContext(TestConfiguration.class));
+
+        Expression expression = handler.getExpressionParser().parseExpression("@number10.compareTo(@number20) < 0");
+        assertTrue((Boolean) expression.getValue(handler.createEvaluationContext(mock(Authentication.class), new Object())));
+    }
+}
+
+@Configuration
+class TestConfiguration {
+
+    @Bean
+    Integer number10() {
+        return 10;
+    }
+
+    @Bean
+    Integer number20() {
+        return 20;
+    }
+}

core/src/test/java/org/springframework/security/access/expression/SecurityExpressionRootTests.java

@@ -20,7 +20,7 @@ import org.springframework.security.core.authority.AuthorityUtils;
  * @since 3.0
  */
 public class SecurityExpressionRootTests {
-    private final Authentication JOE = new TestingAuthenticationToken("joe", "pass", "A", "B");
+    final static Authentication JOE = new TestingAuthenticationToken("joe", "pass", "A", "B");
 
     @Test
     public void denyAllIsFalsePermitAllTrue() throws Exception {