Add some Java love

Author: loverdos

src/main/scala/com/ckkloverdos/env/JEnvHelpers.java

@@ -0,0 +1,71 @@
+package com.ckkloverdos.env;
+
+import com.ckkloverdos.key.TypedKeyOnly;
+
+/**
+ * @author Christos KK Loverdos <loverdos@gmail.com>
+ */
+public final class JEnvHelpers {
+  private JEnvHelpers() {}
+
+  public static Env newEnv() {
+    return Env$.MODULE$.apply();
+  }
+
+  public static <A> Env add(Env env, TypedKeyOnly<A> key, A value) {
+    return env.$plus(key, value, key.keyType());
+  }
+
+  public static <A> Env remove(Env env, TypedKeyOnly<A> key) {
+    return env.$minus(key, key.keyType());
+  }
+
+  public static <A, B> Env add(
+      Env env,
+      TypedKeyOnly<A> keyA,
+      A valueA,
+      TypedKeyOnly<B> keyB,
+      B valueB
+  ) {
+
+    return env.
+      $plus(keyA, valueA, keyA.keyType()).
+      $plus(keyB, valueB, keyB.keyType());
+  }
+
+  public static <A, B, C> Env add(
+      Env env,
+      TypedKeyOnly<A> keyA,
+      A valueA,
+      TypedKeyOnly<B> keyB,
+      B valueB,
+      TypedKeyOnly<C> keyC,
+      C valueC
+  ) {
+
+    return env.
+      $plus(keyA, valueA, keyA.keyType()).
+      $plus(keyB, valueB, keyB.keyType()).
+      $plus(keyC, valueC, keyC.keyType());
+  }
+
+  public static <A, B, C, D> Env add(
+      Env env,
+      TypedKeyOnly<A> keyA,
+      A valueA,
+      TypedKeyOnly<B> keyB,
+      B valueB,
+      TypedKeyOnly<C> keyC,
+      C valueC,
+      TypedKeyOnly<D> keyD,
+      D valueD
+
+  ) {
+
+    return env.
+      $plus(keyA, valueA, keyA.keyType()).
+      $plus(keyB, valueB, keyB.keyType()).
+      $plus(keyC, valueC, keyC.keyType()).
+      $plus(keyD, valueD, keyD.keyType());
+  }
+}