From 0a9099c8dd67e438388e71791df562a5c6ad9490 Mon Sep 17 00:00:00 2001
From: Christian <cpw@weeksfamily.ca>
Date: Sat, 10 May 2014 13:36:24 -0400
Subject: [PATCH] Add a helper for casting some common collection types into
 generic form

---
 .../functions/CollectionWrapperFactory.java   | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 fml/src/main/java/cpw/mods/fml/common/functions/CollectionWrapperFactory.java

diff --git a/fml/src/main/java/cpw/mods/fml/common/functions/CollectionWrapperFactory.java b/fml/src/main/java/cpw/mods/fml/common/functions/CollectionWrapperFactory.java
new file mode 100644
index 0000000000..1211b7f306
--- /dev/null
+++ b/fml/src/main/java/cpw/mods/fml/common/functions/CollectionWrapperFactory.java
@@ -0,0 +1,32 @@
+package cpw.mods.fml.common.functions;
+
+import java.util.Collection;
+import java.util.List;
+import com.google.common.collect.Collections2;
+import com.google.common.collect.Lists;
+
+public class CollectionWrapperFactory {
+    /**
+     * Return a read only cast view of the supplied ungeneric collection, based on the element type given
+     * @param coll The collection to cast
+     * @param elementType the supertype contained in the collection
+     * @return a collection asserting that type relationship
+     */
+    public static <T> Collection<T> wrap(@SuppressWarnings("rawtypes") Collection coll, Class<T> elementType)
+    {
+        Collection<?> asGeneric = coll;
+        return Collections2.transform(asGeneric, new TypeCastFunction<T>(elementType));
+    }
+
+    /**
+     * Return a read only cast view of the supplied ungeneric list, based on the element type given
+     * @param list The list to cast
+     * @param elementType the supertype contained in the list
+     * @return a list asserting that type relationship
+     */
+    public static <T> List<T> wrap(@SuppressWarnings("rawtypes") List list, Class<T> elementType)
+    {
+        List<?> asGeneric = list;
+        return Lists.transform(asGeneric, new TypeCastFunction<T>(elementType));
+    }
+}