Moving to source sets

src/main/java/appeng/util/item/AEItemStackRegistry.java

@@ -0,0 +1,74 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 AlgorithmX2
+ *
+ * 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package appeng.util.item;
+
+import java.lang.ref.WeakReference;
+import java.util.WeakHashMap;
+
+import javax.annotation.Nonnull;
+
+import net.minecraft.item.ItemStack;
+
+import appeng.util.Platform;
+
+public final class AEItemStackRegistry {
+    private static final WeakHashMap<AESharedItemStack, WeakReference<AESharedItemStack>> SERVER_REGISTRY = new WeakHashMap<>();
+    private static final WeakHashMap<AESharedItemStack, WeakReference<AESharedItemStack>> CLIENT_REGISTRY = new WeakHashMap<>();
+
+    private AEItemStackRegistry() {
+    }
+
+    private static WeakHashMap<AESharedItemStack, WeakReference<AESharedItemStack>> registry() {
+        if (Platform.isClient()) {
+            return CLIENT_REGISTRY;
+        } else {
+            return SERVER_REGISTRY;
+        }
+    }
+
+    static synchronized AESharedItemStack getRegisteredStack(final @Nonnull ItemStack itemStack) {
+        if (itemStack.isEmpty()) {
+            throw new IllegalArgumentException("stack cannot be empty");
+        }
+
+        int oldStackSize = itemStack.getCount();
+        itemStack.setCount(1);
+
+        AESharedItemStack search = new AESharedItemStack(itemStack);
+        WeakReference<AESharedItemStack> weak = registry().get(search);
+        AESharedItemStack ret = null;
+
+        if (weak != null) {
+            ret = weak.get();
+        }
+
+        if (ret == null) {
+            ret = new AESharedItemStack(itemStack.copy());
+            registry().put(ret, new WeakReference<>(ret));
+        }
+        itemStack.setCount(oldStackSize);
+
+        return ret;
+    }
+}