From b7e0010d6e8e5413fcd66eae158111db509eb27b Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sun, 28 Feb 2016 19:18:28 +0000
Subject: Split ConcreteType up into specialised type implementations

---
 src/main/java/org/zwobble/couscous/util/ExtraMaps.java | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/main/java/org/zwobble/couscous/util/ExtraMaps.java')

diff --git a/src/main/java/org/zwobble/couscous/util/ExtraMaps.java b/src/main/java/org/zwobble/couscous/util/ExtraMaps.java
index e5d21e9..09339e6 100644
--- a/src/main/java/org/zwobble/couscous/util/ExtraMaps.java
+++ b/src/main/java/org/zwobble/couscous/util/ExtraMaps.java
@@ -2,6 +2,7 @@ package org.zwobble.couscous.util;
 
 import com.google.common.collect.ImmutableMap;
 
+import java.util.AbstractMap;
 import java.util.Map;
 import java.util.function.Function;
 
@@ -31,4 +32,8 @@ public class ExtraMaps {
 
         return builder.build();
     }
+
+    public static <T, K> Map<K, T> toMapWithKeys(Iterable<T> iterable, Function<T, K> function) {
+        return toMap(iterable, value -> new AbstractMap.SimpleImmutableEntry<K, T>(function.apply(value), value));
+    }
 }
-- 
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