diff -r 88b85470e72c -r f50545b5e2f1 src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/mimepull/FileData.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/mimepull/FileData.java	Tue Mar 06 16:09:35 2012 -0800
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 1997, 2010, 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 com.sun.xml.internal.org.jvnet.mimepull;
+
+import java.nio.ByteBuffer;
+
+/**
+ * Keeps the Part's partial content data in a file.
+ *
+ * @author Kohsuke Kawaguchi
+ * @author Jitendra Kotamraju
+ */
+final class FileData implements Data {
+    private final DataFile file;
+    private final long pointer;         // read position
+    private final int length;
+
+    FileData(DataFile file, ByteBuffer buf) {
+        this(file, file.writeTo(buf.array(), 0, buf.limit()), buf.limit());
+    }
+
+    FileData(DataFile file, long pointer, int length) {
+        this.file = file;
+        this.pointer = pointer;
+        this.length = length;
+    }
+
+    public byte[] read() {
+        byte[] buf = new byte[length];
+        file.read(pointer, buf, 0, length);
+        return buf;
+    }
+
+    /*
+     * This shouldn't be called
+     */
+    public long writeTo(DataFile file) {
+        throw new IllegalStateException();
+    }
+
+    public int size() {
+        return length;
+    }
+
+    /*
+     * Always create FileData
+     */
+    public Data createNext(DataHead dataHead, ByteBuffer buf) {
+        return new FileData(file, buf);
+    }
+}