--- a/jdk/src/jdk.dev/share/classes/com/sun/tools/hat/internal/parser/MappedReadBuffer.java	Mon May 25 09:13:41 2015 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,114 +0,0 @@
-/*
- * Copyright (c) 1997, 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.
- */
-
-
-/*
- * The Original Code is HAT. The Initial Developer of the
- * Original Code is Bill Foote, with contributions from others
- * at JavaSoft/Sun.
- */
-
-package com.sun.tools.hat.internal.parser;
-
-import java.io.IOException;
-import java.io.RandomAccessFile;
-import java.nio.MappedByteBuffer;
-import java.nio.channels.FileChannel;
-
-/**
- * Implementation of ReadBuffer using mapped file buffer
- *
- * @author A. Sundararajan
- */
-class MappedReadBuffer implements ReadBuffer {
-    private MappedByteBuffer buf;
-
-    MappedReadBuffer(MappedByteBuffer buf) {
-        this.buf = buf;
-    }
-
-    // factory method to create correct ReadBuffer for a given file
-    static ReadBuffer create(RandomAccessFile file) throws IOException {
-        FileChannel ch = file.getChannel();
-        long size = ch.size();
-        // if file size is more than 2 GB and when file mapping is
-        // configured (default), use mapped file reader
-        if (canUseFileMap() && (size <= Integer.MAX_VALUE)) {
-            MappedByteBuffer buf;
-            try {
-                buf = ch.map(FileChannel.MapMode.READ_ONLY, 0, size);
-                ch.close();
-                return new MappedReadBuffer(buf);
-            } catch (IOException exp) {
-                exp.printStackTrace();
-                System.err.println("File mapping failed, will use direct read");
-                // fall through
-            }
-        } // else fall through
-        return new FileReadBuffer(file);
-    }
-
-    private static boolean canUseFileMap() {
-        // set jhat.disableFileMap to any value other than "false"
-        // to disable file mapping
-        String prop = System.getProperty("jhat.disableFileMap");
-        return prop == null || prop.equals("false");
-    }
-
-    private void seek(long pos) throws IOException {
-        assert pos <= Integer.MAX_VALUE :  "position overflow";
-        buf.position((int)pos);
-    }
-
-    public synchronized void get(long pos, byte[] res) throws IOException {
-        seek(pos);
-        buf.get(res);
-    }
-
-    public synchronized char getChar(long pos) throws IOException {
-        seek(pos);
-        return buf.getChar();
-    }
-
-    public synchronized byte getByte(long pos) throws IOException {
-        seek(pos);
-        return buf.get();
-    }
-
-    public synchronized short getShort(long pos) throws IOException {
-        seek(pos);
-        return buf.getShort();
-    }
-
-    public synchronized int getInt(long pos) throws IOException {
-        seek(pos);
-        return buf.getInt();
-    }
-
-    public synchronized long getLong(long pos) throws IOException {
-        seek(pos);
-        return buf.getLong();
-    }
-}