vendor in jar

dub.sdl

@@ -8,7 +8,6 @@ dependency "witchcraft" version="~>0.1.9"
 dependency "colorize" version="~>1.0.5"
 dependency "typetips" version="~>0.1.4"
 dependency "minlog" version="~>2.0.0"
-dependency "jar" version="~>0.1.0"
 dependency "dray" version=">=5.0.0-r1 <5.1.0-0"
 dependency "optional" version="~>1.3.0"
 

dub.selections.json

@@ -6,7 +6,6 @@
 		"ddmp": "0.0.1-0.dev.3",
 		"dray": "5.0.0-r1",
 		"fluent-asserts": "0.13.3",
-		"jar": "0.1.0",
 		"libdparse": "0.14.0",
 		"minlog": "2.0.0",
 		"optional": "1.3.0",

source/re/core.d

@@ -18,7 +18,7 @@ import re.math;
 import re.util.logger;
 import re.util.tweens.tween_manager;
 import re.util.env;
-import jar;
+import re.util.jar;
 static import raylib;
 
 /**

source/re/util/jar.d

@@ -0,0 +1,61 @@
+module re.util.jar;
+
+import std.array;
+import std.typecons;
+
+/// a container for registered types
+class Jar {
+    private Object[][TypeInfo] _instance_registry;
+
+    /// register a type instance
+    public T register(T)(T instance) {
+        auto type = typeid(instance);
+        if (type !in _instance_registry) {
+            _instance_registry[type] = new Object[0];
+        }
+        _instance_registry[type] ~= instance;
+        return instance;
+    }
+
+    /// resolve all matching type instances
+    public T[] resolve_all(T)() {
+        auto type = typeid(T);
+        if (type in _instance_registry) {
+            Appender!(T[]) resolved;
+            foreach (item; _instance_registry[type]) {
+                resolved ~= cast(T) item;
+            }
+            return resolved.data;
+        }
+        return new T[0];
+    }
+
+    /// resolve first matching type instance
+    public Nullable!T resolve(T)() {
+        auto items = resolve_all!T();
+        if (items.length > 0) {
+            return Nullable!T(items[0]);
+        }
+        return Nullable!T.init;
+    }
+}
+
+unittest {
+    class Cookie {
+        bool delicious = true;
+    }
+
+    auto jar = new Jar();
+
+    auto c1 = new Cookie();
+    jar.register(c1);
+    auto r1 = jar.resolve!Cookie();
+    assert(!r1.isNull, "resolved item was null");
+    assert(r1.get() == c1, "resolved item did not match");
+
+    auto c2 = new Cookie();
+    jar.register(c2);
+
+    const auto cookies = jar.resolve_all!Cookie();
+    assert(cookies.length == 2, "mismatch in number of registered items");
+}