Add convenience factory method for Managed[List|Set|Map]

Closes gh-28026

spring-beans/src/main/java/org/springframework/beans/factory/support/ManagedList.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@
 package org.springframework.beans.factory.support;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 import org.springframework.beans.BeanMetadataElement;
@@ -53,6 +54,20 @@ public class ManagedList<E> extends ArrayList<E> implements Mergeable, BeanMetad
 	}
 
 
+	/**
+	 * Return a new instance containing an arbitrary number of elements.
+	 * @param elements the elements to be contained in the list
+	 * @param <E> the {@code List}'s element type
+	 * @return a {@code List} containing the specified elements
+	 * @since 5.3.16
+	 */
+	@SuppressWarnings("unchecked")
+	public static <E> ManagedList<E> of(E... elements) {
+		ManagedList<E> list = new ManagedList<>();
+		list.addAll(Arrays.asList(elements));
+		return list;
+	}
+
 	/**
 	 * Set the configuration source {@code Object} for this metadata element.
 	 * <p>The exact type of the object will depend on the configuration mechanism used.

spring-beans/src/main/java/org/springframework/beans/factory/support/ManagedMap.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,6 +18,7 @@ package org.springframework.beans.factory.support;
 
 import java.util.LinkedHashMap;
 import java.util.Map;
+import java.util.Map.Entry;
 
 import org.springframework.beans.BeanMetadataElement;
 import org.springframework.beans.Mergeable;
@@ -56,6 +57,25 @@ public class ManagedMap<K, V> extends LinkedHashMap<K, V> implements Mergeable,
 	}
 
 
+	/**
+	 * Return a new instance containing keys and values extracted from the
+	 * given entries. The entries themselves are not stored in the map.
+	 * @param entries {@code Map.Entry}s containing the keys and values
+	 * from which the map is populated
+	 * @param <K> the {@code Map}'s key type
+	 * @param <V> the {@code Map}'s value type
+	 * @return a {@code Map} containing the specified mappings
+	 * @since 5.3.16
+	 */
+	@SuppressWarnings("unchecked")
+	public static <K,V> ManagedMap<K,V> ofEntries(Entry<? extends K, ? extends V>... entries) {
+		ManagedMap<K,V > map = new ManagedMap<>();
+		for (Entry<? extends K, ? extends V> entry : entries) {
+			map.put(entry.getKey(), entry.getValue());
+		}
+		return map;
+	}
+
 	/**
 	 * Set the configuration source {@code Object} for this metadata element.
 	 * <p>The exact type of the object will depend on the configuration mechanism used.

spring-beans/src/main/java/org/springframework/beans/factory/support/ManagedSet.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@
 
 package org.springframework.beans.factory.support;
 
+import java.util.Arrays;
 import java.util.LinkedHashSet;
 import java.util.Set;
 
@@ -52,6 +53,20 @@ public class ManagedSet<E> extends LinkedHashSet<E> implements Mergeable, BeanMe
 	}
 
 
+	/**
+	 * Return a new instance containing an arbitrary number of elements.
+	 * @param elements the elements to be contained in the set
+	 * @param <E> the {@code Set}'s element type
+	 * @return a {@code Set} containing the specified elements
+	 * @since 5.3.16
+	 */
+	@SuppressWarnings("unchecked")
+	public static <E> ManagedSet<E> of(E... elements) {
+		ManagedSet<E> set = new ManagedSet<>();
+		set.addAll(Arrays.asList(elements));
+		return set;
+	}
+
 	/**
 	 * Set the configuration source {@code Object} for this metadata element.
 	 * <p>The exact type of the object will depend on the configuration mechanism used.