1 /*
 2  * Copyright (c) 1996, 2020, 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 package org.openjdk.asmtools.jdis;
24 
25 import java.io.IOException;
26 import java.nio.charset.StandardCharsets;
27 import java.nio.file.Files;
28 import java.nio.file.Path;
29 import java.nio.file.Paths;
30 import java.util.List;
31 
32 /**
33  * A container for the java sources tied to an jasm output when -sl in on
34  */
35 public class TextLines {
36 
37     final Path file;
38     List<String> lines;
39 
40     public TextLines(Path directory, String sourceFileName) {
41         file = directory == null ? Paths.get(sourceFileName) : directory.resolve(sourceFileName);
42         try {
43             lines = Files.readAllLines(file, StandardCharsets.UTF_8);
44         } catch (IOException ignore) {}
45     }
46 
47     public String getLine(int index) {
48         if( lines != null ) {
49             if (index < 1 || index >= lines.size()) {
50                 return String.format("Line number %d is out of range in \"%s\"", index, file);
51             }
52             return lines.get(index - 1);
53         }
54         return String.format("\"%s\" not found", file);
55     }
56 }