--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/jdk.jdeps/share/classes/com/sun/tools/classfile/ClassReader.java	Wed May 27 13:25:18 2015 -0700
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2007, 2008, 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.tools.classfile;
+
+import java.io.BufferedInputStream;
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Objects;
+
+/**
+ *  <p><b>This is NOT part of any supported API.
+ *  If you write code that depends on this, you do so at your own risk.
+ *  This code and its internal interfaces are subject to change or
+ *  deletion without notice.</b>
+ */
+public class ClassReader {
+    ClassReader(ClassFile classFile, InputStream in, Attribute.Factory attributeFactory) throws IOException {
+        this.classFile = Objects.requireNonNull(classFile);
+        this.attributeFactory = Objects.requireNonNull(attributeFactory);
+        this.in = new DataInputStream(new BufferedInputStream(in));
+    }
+
+    ClassFile getClassFile() {
+        return classFile;
+    }
+
+    ConstantPool getConstantPool() {
+        return classFile.constant_pool;
+    }
+
+    public Attribute readAttribute() throws IOException {
+        int name_index = readUnsignedShort();
+        int length = readInt();
+        byte[] data = new byte[length];
+        readFully(data);
+
+        DataInputStream prev = in;
+        in = new DataInputStream(new ByteArrayInputStream(data));
+        try {
+            return attributeFactory.createAttribute(this, name_index, data);
+        } finally {
+            in = prev;
+        }
+    }
+
+    public void readFully(byte[] b) throws IOException {
+        in.readFully(b);
+    }
+
+    public int readUnsignedByte() throws IOException {
+        return in.readUnsignedByte();
+    }
+
+    public int readUnsignedShort() throws IOException {
+        return in.readUnsignedShort();
+    }
+
+    public int readInt() throws IOException {
+        return in.readInt();
+    }
+
+    public long readLong() throws IOException {
+        return in.readLong();
+    }
+
+    public float readFloat() throws IOException {
+        return in.readFloat();
+    }
+
+    public double readDouble() throws IOException {
+        return in.readDouble();
+    }
+
+    public String readUTF() throws IOException {
+        return in.readUTF();
+    }
+
+    private DataInputStream in;
+    private ClassFile classFile;
+    private Attribute.Factory attributeFactory;
+}