Add mutate method to RSocketStrategies

Closes gh-22799

spring-messaging/src/main/java/org/springframework/messaging/rsocket/DefaultRSocketStrategies.java

@@ -94,6 +94,17 @@ final class DefaultRSocketStrategies implements RSocketStrategies {
 		private DataBufferFactory dataBufferFactory;
 
 
+		public DefaultRSocketStrategiesBuilder() {
+		}
+
+		public DefaultRSocketStrategiesBuilder(RSocketStrategies other) {
+			this.encoders.addAll(other.encoders());
+			this.decoders.addAll(other.decoders());
+			this.adapterRegistry = other.reactiveAdapterRegistry();
+			this.dataBufferFactory = other.dataBufferFactory();
+		}
+
+
 		@Override
 		public Builder encoder(Encoder<?>... encoders) {
 			this.encoders.addAll(Arrays.asList(encoders));

spring-messaging/src/main/java/org/springframework/messaging/rsocket/RSocketStrategies.java

@@ -105,6 +105,14 @@ public interface RSocketStrategies {
 		return new DefaultRSocketStrategies.DefaultRSocketStrategiesBuilder();
 	}
 
+	/**
+	 * Return a builder to create a new {@link RSocketStrategies} instance
+	 * replicated from the current instance.
+	 */
+	default Builder mutate() {
+		return new DefaultRSocketStrategies.DefaultRSocketStrategiesBuilder(this);
+	}
+
 
 	/**
 	 * The builder options for creating {@code RSocketStrategies}.
@@ -118,15 +126,15 @@ public interface RSocketStrategies {
 		Builder encoder(Encoder<?>... encoder);
 
 		/**
-		 * Add decoders for de-serializing Objects.
-		 * <p>By default this is empty.
+		 * Access and manipulate the list of configured {@link #encoder encoders}.
 		 */
-		Builder decoder(Decoder<?>... decoder);
+		Builder encoders(Consumer<List<Encoder<?>>> consumer);
 
 		/**
-		 * Access and manipulate the list of configured {@link #encoder encoders}.
+		 * Add decoders for de-serializing Objects.
+		 * <p>By default this is empty.
 		 */
-		Builder encoders(Consumer<List<Encoder<?>>> consumer);
+		Builder decoder(Decoder<?>... decoder);
 
 		/**
 		 * Access and manipulate the list of configured {@link #encoder decoders}.
@@ -137,7 +145,7 @@ public interface RSocketStrategies {
 		 * Configure the registry for reactive type support. This can be used to
 		 * to adapt to, and/or determine the semantics of a given
 		 * {@link org.reactivestreams.Publisher Publisher}.
-		 * <p>By default this {@link ReactiveAdapterRegistry#sharedInstance}.
+		 * <p>By default this {@link ReactiveAdapterRegistry#getSharedInstance()}.
 		 * @param registry the registry to use
 		 */
 		Builder reactiveAdapterStrategy(ReactiveAdapterRegistry registry);