| /* |
| * Copyright (c) 1997, 2012, 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.io.*; |
| |
| /** |
| * Use {@link RandomAccessFile} for concurrent access of read |
| * and write partial part's content. |
| * |
| * @author Kohsuke Kawaguchi |
| * @author Jitendra Kotamraju |
| */ |
| final class DataFile { |
| private WeakDataFile weak; |
| private long writePointer; |
| |
| DataFile(File file) { |
| writePointer=0; |
| weak = new WeakDataFile(this, file); |
| } |
| |
| /** |
| * |
| */ |
| void close() { |
| weak.close(); |
| } |
| |
| /** |
| * Read data from the given file pointer position. |
| * |
| * @param pointer read position |
| * @param buf that needs to be filled |
| * @param offset the start offset of the data. |
| * @param length of data that needs to be read |
| */ |
| synchronized void read(long pointer, byte[] buf, int offset, int length ) { |
| weak.read(pointer, buf, offset, length); |
| } |
| |
| void renameTo(File f) { |
| weak.renameTo(f); |
| } |
| |
| /** |
| * Write data to the file |
| * |
| * @param data that needs to written to a file |
| * @param offset start offset in the data |
| * @param length no bytes to write |
| * @return file pointer before the write operation(or at which the |
| * data is written) |
| */ |
| synchronized long writeTo(byte[] data, int offset, int length) { |
| long temp = writePointer; |
| writePointer = weak.writeTo(writePointer, data, offset, length); |
| return temp; |
| } |
| |
| } |