1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 package jdk.jfr.internal.consumer;

    25 

    26 import java.io.File;

    27 import java.io.IOException;

    28 import java.io.RandomAccessFile;

    29 import java.nio.file.DirectoryStream;

    30 import java.nio.file.Files;

    31 import java.nio.file.Path;

    32 

    33 // Protected by modular boundaries.

    34 public abstract class FileAccess {

    35     public final static FileAccess UNPRIVILIGED = new UnPriviliged();

    36 

    37     public abstract RandomAccessFile openRAF(File f, String mode) throws IOException;

    38 

    39     public abstract DirectoryStream<Path> newDirectoryStream(Path repository) throws IOException;

    40 

    41     public abstract String getAbsolutePath(File f) throws IOException;

    42 

    43     public abstract long length(File f) throws IOException;

    44 

    45     public abstract long fileSize(Path p) throws IOException;

    46 

    47     private static class UnPriviliged extends FileAccess {

    48         @Override

    49         public RandomAccessFile openRAF(File f, String mode) throws IOException {

    50             return new RandomAccessFile(f, mode);

    51         }

    52 

    53         @Override

    54         public DirectoryStream<Path> newDirectoryStream(Path dir) throws IOException {

    55             return Files.newDirectoryStream(dir);

    56         }

    57 

    58         @Override

    59         public String getAbsolutePath(File f) throws IOException {

    60             return f.getAbsolutePath();

    61         }

    62 

    63         @Override

    64         public long length(File f) throws IOException {

    65             return f.length();

    66         }

    67 

    68         @Override

    69         public long fileSize(Path p) throws IOException {

    70             return Files.size(p);

    71         }

    72     }

    73 }