Use computeIfAbsent in SpelCompiler and AdvisedSupport

See gh-26028

spring-aop/src/main/java/org/springframework/aop/framework/AdvisedSupport.java

@@ -479,14 +479,8 @@ public class AdvisedSupport extends ProxyConfig implements Advised {
 	 * @return a List of MethodInterceptors (may also include InterceptorAndDynamicMethodMatchers)
 	 */
 	public List<Object> getInterceptorsAndDynamicInterceptionAdvice(Method method, @Nullable Class<?> targetClass) {
-		MethodCacheKey cacheKey = new MethodCacheKey(method);
-		List<Object> cached = this.methodCache.get(cacheKey);
-		if (cached == null) {
-			cached = this.advisorChainFactory.getInterceptorsAndDynamicInterceptionAdvice(
-					this, method, targetClass);
-			this.methodCache.put(cacheKey, cached);
-		}
-		return cached;
+		return this.methodCache.computeIfAbsent(new MethodCacheKey(method), k ->
+				this.advisorChainFactory.getInterceptorsAndDynamicInterceptionAdvice(this, method, targetClass));
 	}
 
 	/**

spring-expression/src/main/java/org/springframework/expression/spel/standard/SpelCompiler.java

@@ -233,11 +233,7 @@ public final class SpelCompiler implements Opcodes {
 		if (compiler == null) {
 			// Full lock now since we're creating a child ClassLoader
 			synchronized (compilers) {
-				compiler = compilers.get(clToUse);
-				if (compiler == null) {
-					compiler = new SpelCompiler(clToUse);
-					compilers.put(clToUse, compiler);
-				}
+				return compilers.computeIfAbsent(clToUse, SpelCompiler::new);
 			}
 		}
 		return compiler;