Added toArray() that accepts a runtime-type token class literal and creates

an array of the correct size.


git-svn-id: https://samskivert.googlecode.com/svn/trunk@2645 6335cc39-0255-0410-8fd6-9bcaacd3b74c

src/java/com/samskivert/util/CollectionUtil.java

@@ -20,6 +20,8 @@
 
 package com.samskivert.util;
 
+import java.lang.reflect.Array;
+
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Enumeration;
@@ -148,6 +150,17 @@ public class CollectionUtil
         return subset;
     }
 
+    /**
+     * Returns an Array, of the type specified by the runtime-type token <code>type</code>,
+     * containing the elements of the collection.
+     */
+    public static <T> T[] toArray (Collection<? extends T> col, Class<T> type)
+    {
+        @SuppressWarnings("unchecked")
+        T[] array = (T[]) Array.newInstance(type, col.size());
+        return col.toArray(array);
+    }
+
     /**
      * If a collection contains only <code>Integer</code> objects, it can be
      * passed to this function and converted into an int array.