Thu, 31 Aug 2017 15:18:52 +0800
merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. Oracle designates this |
aoqi@0 | 8 | * particular file as subject to the "Classpath" exception as provided |
aoqi@0 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
aoqi@0 | 10 | * |
aoqi@0 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 15 | * accompanied this code). |
aoqi@0 | 16 | * |
aoqi@0 | 17 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 20 | * |
aoqi@0 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 22 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 23 | * questions. |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | package com.sun.xml.internal.org.jvnet.mimepull; |
aoqi@0 | 27 | |
aoqi@0 | 28 | import java.io.*; |
aoqi@0 | 29 | |
aoqi@0 | 30 | /** |
aoqi@0 | 31 | * Use {@link RandomAccessFile} for concurrent access of read |
aoqi@0 | 32 | * and write partial part's content. |
aoqi@0 | 33 | * |
aoqi@0 | 34 | * @author Kohsuke Kawaguchi |
aoqi@0 | 35 | * @author Jitendra Kotamraju |
aoqi@0 | 36 | */ |
aoqi@0 | 37 | final class DataFile { |
aoqi@0 | 38 | private WeakDataFile weak; |
aoqi@0 | 39 | private long writePointer; |
aoqi@0 | 40 | |
aoqi@0 | 41 | DataFile(File file) { |
aoqi@0 | 42 | writePointer=0; |
aoqi@0 | 43 | weak = new WeakDataFile(this, file); |
aoqi@0 | 44 | } |
aoqi@0 | 45 | |
aoqi@0 | 46 | /** |
aoqi@0 | 47 | * |
aoqi@0 | 48 | */ |
aoqi@0 | 49 | void close() { |
aoqi@0 | 50 | weak.close(); |
aoqi@0 | 51 | } |
aoqi@0 | 52 | |
aoqi@0 | 53 | /** |
aoqi@0 | 54 | * Read data from the given file pointer position. |
aoqi@0 | 55 | * |
aoqi@0 | 56 | * @param pointer read position |
aoqi@0 | 57 | * @param buf that needs to be filled |
aoqi@0 | 58 | * @param offset the start offset of the data. |
aoqi@0 | 59 | * @param length of data that needs to be read |
aoqi@0 | 60 | */ |
aoqi@0 | 61 | synchronized void read(long pointer, byte[] buf, int offset, int length ) { |
aoqi@0 | 62 | weak.read(pointer, buf, offset, length); |
aoqi@0 | 63 | } |
aoqi@0 | 64 | |
aoqi@0 | 65 | void renameTo(File f) { |
aoqi@0 | 66 | weak.renameTo(f); |
aoqi@0 | 67 | } |
aoqi@0 | 68 | |
aoqi@0 | 69 | /** |
aoqi@0 | 70 | * Write data to the file |
aoqi@0 | 71 | * |
aoqi@0 | 72 | * @param data that needs to written to a file |
aoqi@0 | 73 | * @param offset start offset in the data |
aoqi@0 | 74 | * @param length no bytes to write |
aoqi@0 | 75 | * @return file pointer before the write operation(or at which the |
aoqi@0 | 76 | * data is written) |
aoqi@0 | 77 | */ |
aoqi@0 | 78 | synchronized long writeTo(byte[] data, int offset, int length) { |
aoqi@0 | 79 | long temp = writePointer; |
aoqi@0 | 80 | writePointer = weak.writeTo(writePointer, data, offset, length); |
aoqi@0 | 81 | return temp; |
aoqi@0 | 82 | } |
aoqi@0 | 83 | |
aoqi@0 | 84 | } |