Convenient forType methods for ParameterizedTypeReference

Issue: SPR-16054

spring-core/src/main/java/org/springframework/core/ParameterizedTypeReference.java

@@ -53,6 +53,10 @@ public abstract class ParameterizedTypeReference<T> {
 		this.type = parameterizedType.getActualTypeArguments()[0];
 	}
 
+	private ParameterizedTypeReference(Type type) {
+		this.type = type;
+	}
+
 
 	public Type getType() {
 		return this.type;
@@ -75,6 +79,19 @@ public abstract class ParameterizedTypeReference<T> {
 	}
 
 
+	/**
+	 * Build a {@code ParameterizedTypeReference} wrapping the given type.
+	 * @param type a generic type (possibly obtained via reflection,
+	 * e.g. from {@link java.lang.reflect.Method#getGenericReturnType()})
+	 * @return a corresponding reference which may be passed into
+	 * {@code ParameterizedTypeReference}-accepting methods
+	 * @since 4.3.12
+	 */
+	public static <T> ParameterizedTypeReference<T> forType(Type type) {
+		return new ParameterizedTypeReference<T>(type) {
+		};
+	}
+
 	private static Class<?> findParameterizedTypeReferenceSubclass(Class<?> child) {
 		Class<?> parent = child.getSuperclass();
 		if (Object.class == parent) {

spring-core/src/main/java/org/springframework/core/ResolvableType.java

@@ -1340,6 +1340,19 @@ public class ResolvableType implements Serializable {
 		return forType(type, variableResolver);
 	}
 
+
+	/**
+	 * Return a {@link ResolvableType} for the specified {@link ParameterizedTypeReference}.
+	 * Note: The resulting {@link ResolvableType} may not be {@link Serializable}.
+	 * @param typeReference the reference to obtain the source type from
+	 * @return a {@link ResolvableType} for the specified {@link ParameterizedTypeReference}
+	 * @since 4.3.12
+	 * @see #forType(Type)
+	 */
+	public static ResolvableType forType(ParameterizedTypeReference<?> typeReference) {
+		return forType(typeReference.getType(), null ,null);
+	}
+
 	/**
 	 * Return a {@link ResolvableType} for the specified {@link Type} backed by a given
 	 * {@link VariableResolver}.