Move Mapping all the way up to samskivert.

git-svn-id: https://samskivert.googlecode.com/svn/trunk@2681 6335cc39-0255-0410-8fd6-9bcaacd3b74c

src/java/com/samskivert/util/Mapping.java

@@ -0,0 +1,83 @@
+// $Id$
+//
+// samskivert library - useful routines for java programs
+// Copyright (C) 2001-2010 Michael Bayne
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.samksivert.util;
+
+import java.util.HashMap;
+
+/**
+ * A utility class to succinctly construct a HashMap seeded with particular mappings.
+ */
+public class Mapping
+{
+    public static <K, V> HashMap<K, V> of (K k1, V val1)
+    {
+        return of(new Object[] { k1, val1 });
+    }
+
+    public static <K, V> HashMap<K, V> of (K k1, V v1, K k2, V v2)
+    {
+        return of(new Object[] { k1, v1, k2, v2 });
+    }
+
+    public static <K, V> HashMap<K, V> of (K k1, V v1, K k2, V v2, K k3, V v3)
+    {
+        return of(new Object[] { k1, v1, k2, v2, k3, v3 });
+    }
+
+    public static <K, V> HashMap<K, V> of (K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4)
+    {
+        return of(new Object[] { k1, v1, k2, v2, k3, v3, k4, v4 });
+    }
+
+    public static <K, V> HashMap<K, V> of (
+        K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5)
+    {
+        return of(new Object[] { k1, v1, k2, v2, k3, v3, k4, v4, k5, v5 });
+    }
+
+    public static <K, V> HashMap<K, V> of (
+        K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5, K k6, V v6)
+    {
+        return of(new Object[] { k1, v1, k2, v2, k3, v3, k4, v4, k5, v5, k6, v6 });
+    }
+
+    public static <K, V> HashMap<K, V> of (
+        K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5, K k6, V v6, K k7, V v7)
+    {
+        return of(new Object[] { k1, v1, k2, v2, k3, v3, k4, v4, k5, v5, k6, v6, k7, v7 });
+    }
+
+    protected static <K, V> HashMap<K, V> of (Object... pairs)
+    {
+        HashMap<K, V> map = new HashMap<K, V>();
+        for (int ii = 0; ii < pairs.length; ii += 2) {
+            @SuppressWarnings("unchecked")
+            K k = (K)pairs[ii];
+            @SuppressWarnings("unchecked")
+            V v = (V)pairs[ii + 1];
+            map.put(k, v);
+        }
+        return map;
+    }
+
+    private Mapping ()
+    {
+    }
+}