Add Serializable functional interfaces, re #44

src/main/java/org/libj/util/function/SerializableConsumer.java

@@ -0,0 +1,33 @@
+/* Copyright (c) 2023 LibJ
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * You should have received a copy of The MIT License (MIT) along with this
+ * program. If not, see <http://opensource.org/licenses/MIT/>.
+ */
+
+package org.libj.util.function;
+
+import java.io.Serializable;
+import java.util.function.Consumer;
+
+/**
+ * Represents an operation that accepts a single input argument and returns no result. Unlike most other functional interfaces,
+ * {@link Consumer} is expected to operate via side-effects.
+ * <p>
+ * The {@link SerializableConsumer} distinguishes itself from {@link Consumer} by extending the {@link Serializable} interface, and
+ * restricting the input argument to {@link Serializable} subtypes.
+ *
+ * @param <T> The type of the input to the operation (subclass of {@link Serializable}).
+ */
+@FunctionalInterface
+public interface SerializableConsumer<T extends Serializable> extends Consumer<T>, Serializable {
+}