Add a convenience method to create a ValueCodeGenerator

This commit makes BeanDefinitionPropertyValueCodeGeneratorDelegates
public and offer a convenience method to create a ValueCodeGenerator
that works will all core delegates.

Closes gh-34761

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

@@ -38,7 +38,6 @@ import org.jspecify.annotations.Nullable;
 import org.springframework.aot.generate.GeneratedMethods;
 import org.springframework.aot.generate.ValueCodeGenerator;
 import org.springframework.aot.generate.ValueCodeGenerator.Delegate;
-import org.springframework.aot.generate.ValueCodeGeneratorDelegates;
 import org.springframework.aot.hint.ExecutableMode;
 import org.springframework.aot.hint.MemberCategory;
 import org.springframework.aot.hint.RuntimeHints;
@@ -103,12 +102,12 @@ class BeanDefinitionPropertiesCodeGenerator {
 
 		this.hints = hints;
 		this.attributeFilter = attributeFilter;
-		List<Delegate> allDelegates = new ArrayList<>();
-		allDelegates.add((valueCodeGenerator, value) -> customValueCodeGenerator.apply(PropertyNamesStack.peek(), value));
-		allDelegates.addAll(additionalDelegates);
-		allDelegates.addAll(BeanDefinitionPropertyValueCodeGeneratorDelegates.INSTANCES);
-		allDelegates.addAll(ValueCodeGeneratorDelegates.INSTANCES);
-		this.valueCodeGenerator = ValueCodeGenerator.with(allDelegates).scoped(generatedMethods);
+		List<Delegate> customDelegates = new ArrayList<>();
+		customDelegates.add((valueCodeGenerator, value) ->
+				customValueCodeGenerator.apply(PropertyNamesStack.peek(), value));
+		customDelegates.addAll(additionalDelegates);
+		this.valueCodeGenerator = BeanDefinitionPropertyValueCodeGeneratorDelegates
+				.createValueCodeGenerator(generatedMethods, customDelegates);
 	}
 
 	@SuppressWarnings("NullAway") // https://github.com/uber/NullAway/issues/1128

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

@@ -16,6 +16,7 @@
 
 package org.springframework.beans.factory.aot;
 
+import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -46,7 +47,7 @@ import org.springframework.javapoet.CodeBlock;
  * @author Stephane Nicoll
  * @since 6.1.2
  */
-abstract class BeanDefinitionPropertyValueCodeGeneratorDelegates {
+public abstract class BeanDefinitionPropertyValueCodeGeneratorDelegates {
 
 	/**
 	 * A list of {@link Delegate} implementations for the following common bean
@@ -73,6 +74,26 @@ abstract class BeanDefinitionPropertyValueCodeGeneratorDelegates {
 	);
 
 
+	/**
+	 * Create a {@link ValueCodeGenerator} instance with both these
+	 * {@link #INSTANCES delegate} and the {@link ValueCodeGeneratorDelegates#INSTANCES
+	 * core delegates}.
+	 * @param generatedMethods the {@link GeneratedMethods} to use
+	 * @param customDelegates additional delegates that should be considered first
+	 * @return a configured value code generator
+	 * @since 7.0
+	 * @see ValueCodeGenerator#add(List)
+	 */
+	public static ValueCodeGenerator createValueCodeGenerator(
+			GeneratedMethods generatedMethods, List<Delegate> customDelegates) {
+		List<Delegate> allDelegates = new ArrayList<>();
+		allDelegates.addAll(customDelegates);
+		allDelegates.addAll(INSTANCES);
+		allDelegates.addAll(ValueCodeGeneratorDelegates.INSTANCES);
+		return ValueCodeGenerator.with(allDelegates).scoped(generatedMethods);
+	}
+
+
 	/**
 	 * {@link Delegate} for {@link ManagedList} types.
 	 */

spring-beans/src/test/java/org/springframework/beans/factory/aot/BeanDefinitionPropertyValueCodeGeneratorDelegatesTests.java

@@ -22,6 +22,7 @@ import java.lang.reflect.Method;
 import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
 import java.time.temporal.ChronoUnit;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
@@ -71,9 +72,8 @@ import static org.assertj.core.api.Assertions.assertThat;
 class BeanDefinitionPropertyValueCodeGeneratorDelegatesTests {
 
 	private static ValueCodeGenerator createValueCodeGenerator(GeneratedClass generatedClass) {
-		return ValueCodeGenerator.with(BeanDefinitionPropertyValueCodeGeneratorDelegates.INSTANCES)
-				.add(ValueCodeGeneratorDelegates.INSTANCES)
-				.scoped(generatedClass.getMethods());
+		return BeanDefinitionPropertyValueCodeGeneratorDelegates.createValueCodeGenerator(
+				generatedClass.getMethods(), Collections.emptyList());
 	}
 
 	private void compile(Object value, BiConsumer<Object, Compiled> result) {