Fixes #1474: Prevents crafting of disabled recipes and deletes invalid parts

src/api/java/appeng/api/definitions/IItemDefinition.java

@@ -1,11 +1,34 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013 - 2015 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.api.definitions;
 
 
+import com.google.common.base.Optional;
+
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
 
-import com.google.common.base.Optional;
-
 
 public interface IItemDefinition extends IComparableDefinition
 {
@@ -18,4 +41,9 @@ public interface IItemDefinition extends IComparableDefinition
 	 * @return an {@link ItemStack} with specified quantity of this item.
 	 */
 	Optional<ItemStack> maybeStack( int stackSize );
+
+	/**
+	 * @return <tt>true</tt> if definition is enabled
+	 */
+	boolean isEnabled();
 }

src/api/java/appeng/api/parts/IPartItem.java

@@ -1,7 +1,7 @@
 /*
  * The MIT License (MIT)
  *
- * Copyright (c) 2013 AlgorithmX2
+ * Copyright (c) 2013 - 2015 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
@@ -24,6 +24,8 @@
 package appeng.api.parts;
 
 
+import javax.annotation.Nullable;
+
 import net.minecraft.item.ItemStack;
 
 //@formatter:off
@@ -63,5 +65,6 @@ public interface IPartItem
 	 *
 	 * @return part from item
 	 */
+	@Nullable
 	IPart createPartFromItemStack( ItemStack is );
 }