--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/java.compiler/share/classes/javax/tools/FileManagerUtils.java	Tue Jan 06 14:51:10 2015 -0800
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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 General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package javax.tools;
+
+import java.io.File;
+import java.nio.file.Path;
+import java.util.Iterator;
+
+/**
+ * Package-private utility methods to convert between files and paths.
+ *
+ * @since 1.9
+ */
+class FileManagerUtils {
+    private FileManagerUtils() { }
+
+    static Iterable<Path> asPaths(final Iterable<? extends File> files) {
+        return () -> new Iterator<Path>() {
+            Iterator<? extends File> iter = files.iterator();
+
+            @Override
+            public boolean hasNext() {
+                return iter.hasNext();
+            }
+
+            @Override
+            public Path next() {
+                return iter.next().toPath();
+            }
+        };
+    }
+
+    static Iterable<File> asFiles(final Iterable<? extends Path> paths) {
+        return () -> new Iterator<File>() {
+            Iterator<? extends Path> iter = paths.iterator();
+
+            @Override
+            public boolean hasNext() {
+                return iter.hasNext();
+            }
+
+            @Override
+            public File next() {
+                Path p = iter.next();
+                try {
+                    return p.toFile();
+                } catch (UnsupportedOperationException e) {
+                    throw new IllegalArgumentException(p.toString(), e);
+                }
+            }
+        };
+    }
+}