Polish CodeBlock joining logic

Consistently use `CodeBlock.joining(", ")` when generating code.

Author: philwebb

spring-beans/src/main/java/org/springframework/beans/factory/aot/BeanDefinitionPropertiesCodeGenerator.java

@@ -140,22 +140,23 @@ CodeBlock generateCode(BeanDefinition beanDefinition) {
 
 	private void addInitDestroyMethods(Builder builder,
 			AbstractBeanDefinition beanDefinition, @Nullable String[] methodNames, String format) {
-
-		if (!ObjectUtils.isEmpty(methodNames)) {
-			Class<?> beanType = ClassUtils
-					.getUserClass(beanDefinition.getResolvableType().toClass());
-			List<String> filteredMethodNames = Arrays.stream(methodNames)
-					.filter(candidate -> !AbstractBeanDefinition.INFER_METHOD.equals(candidate))
-					.toList();
-			if (!ObjectUtils.isEmpty(filteredMethodNames)) {
-				filteredMethodNames.forEach(methodName -> addInitDestroyHint(beanType, methodName));
-				CodeBlock arguments = CodeBlock.join(filteredMethodNames.stream()
-						.map(name -> CodeBlock.of("$S", name)).toList(), ", ");
-				builder.addStatement(format, BEAN_DEFINITION_VARIABLE, arguments);
-			}
+		List<String> filteredMethodNames = (!ObjectUtils.isEmpty(methodNames))
+				? Arrays.stream(methodNames).filter(this::isNotInferredMethod).toList()
+				: Collections.emptyList();
+		if (!filteredMethodNames.isEmpty()) {
+			Class<?> beanType = ClassUtils.getUserClass(beanDefinition.getResolvableType().toClass());
+			filteredMethodNames.forEach(methodName -> addInitDestroyHint(beanType, methodName));
+			CodeBlock arguments = filteredMethodNames.stream()
+					.map(name -> CodeBlock.of("$S", name))
+					.collect(CodeBlock.joining(", "));
+			builder.addStatement(format, BEAN_DEFINITION_VARIABLE, arguments);
 		}
 	}
 
+	private boolean isNotInferredMethod(String candidate) {
+		return !AbstractBeanDefinition.INFER_METHOD.equals(candidate);
+	}
+
 	private void addInitDestroyHint(Class<?> beanUserClass, String methodName) {
 		Method method = ReflectionUtils.findMethod(beanUserClass, methodName);
 		if (method != null) {
@@ -264,12 +265,8 @@ private boolean hasRole(int defaultValue, int actualValue) {
 	}
 
 	private CodeBlock toStringVarArgs(String[] strings) {
-		CodeBlock.Builder builder = CodeBlock.builder();
-		for (int i = 0; i < strings.length; i++) {
-			builder.add((i != 0) ? ", " : "");
-			builder.add("$S", strings[i]);
-		}
-		return builder.build();
+		return Arrays.stream(strings).map(string -> CodeBlock.of("$S", string))
+				.collect(CodeBlock.joining(","));
 	}
 
 	private Object toRole(int value) {

spring-beans/src/main/java/org/springframework/beans/factory/aot/BeanDefinitionPropertyValueCodeGenerator.java

@@ -16,7 +16,7 @@
 
 package org.springframework.beans.factory.aot;
 
-import java.lang.reflect.Array;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Iterator;
@@ -28,6 +28,7 @@
 import java.util.Set;
 import java.util.TreeMap;
 import java.util.TreeSet;
+import java.util.stream.Stream;
 
 import org.springframework.aot.generate.GeneratedMethod;
 import org.springframework.aot.generate.GeneratedMethods;
@@ -43,6 +44,7 @@
 import org.springframework.javapoet.CodeBlock.Builder;
 import org.springframework.lang.Nullable;
 import org.springframework.util.ClassUtils;
+import org.springframework.util.ObjectUtils;
 
 /**
  * Internal code generator used to generate code for a single value contained in
@@ -247,17 +249,11 @@ private class ArrayDelegate implements Delegate {
 		public CodeBlock generateCode(@Nullable Object value, ResolvableType type) {
 			if (type.isArray()) {
 				ResolvableType componentType = type.getComponentType();
-				int length = Array.getLength(value);
+				Stream<CodeBlock> elements = Arrays.stream(ObjectUtils.toObjectArray(value)).map(component ->
+						BeanDefinitionPropertyValueCodeGenerator.this.generateCode(component, componentType));
 				CodeBlock.Builder builder = CodeBlock.builder();
 				builder.add("new $T {", type.toClass());
-				for (int i = 0; i < length; i++) {
-					Object component = Array.get(value, i);
-					if (i != 0) {
-						builder.add(", ");
-					}
-					builder.add("$L", BeanDefinitionPropertyValueCodeGenerator.this
-							.generateCode(component, componentType));
-				}
+				builder.add(elements.collect(CodeBlock.joining(", ")));
 				builder.add("}");
 				return builder.build();
 			}