1 /*
2  * Copyright (c) 2017, 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.tools.jaotc.collect;
25 
26 import java.nio.file.FileSystem;
27 import java.nio.file.Path;
28 import java.nio.file.Paths;
29 import java.util.ArrayList;
30 import java.util.List;
31 
32 public class SearchPath {
33     private final List<Path> searchPaths = new ArrayList<>();
34     private final FileSupport fileSupport;
35 
SearchPath()36     public SearchPath() {
37         this(new FileSupport());
38     }
39 
SearchPath(FileSupport fileSupport)40     public SearchPath(FileSupport fileSupport) {
41         this.fileSupport = fileSupport;
42     }
43 
find(FileSystem fileSystem, Path entry, String... defaults)44     public Path find(FileSystem fileSystem, Path entry, String... defaults) {
45         if (isAbsolute(entry)) {
46             if (exists(entry)) {
47                 return entry;
48             }
49             return null;
50         }
51 
52         if (exists(entry)) {
53             return entry;
54         }
55 
56         for (String searchPath : defaults) {
57             Path newPath = fileSystem.getPath(searchPath, entry.toString());
58             if (exists(newPath)) {
59                 return newPath;
60             }
61         }
62 
63         for (Path searchPath : searchPaths) {
64             Path newPath = fileSystem.getPath(searchPath.toString(), entry.toString());
65             if (exists(newPath)) {
66                 return newPath;
67             }
68         }
69 
70         return null;
71     }
72 
isAbsolute(Path entry)73     private boolean isAbsolute(Path entry) {
74         return fileSupport.isAbsolute(entry);
75     }
76 
exists(Path entry)77     private boolean exists(Path entry) {
78         return fileSupport.exists(entry);
79     }
80 
add(String... paths)81     public void add(String... paths) {
82         for (String name : paths) {
83             Path path = Paths.get(name);
84             searchPaths.add(path);
85         }
86     }
87 }
88