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 */
23package jdk.tools.jaotc.collect;
24
25import java.nio.file.FileSystem;
26import java.nio.file.Path;
27import java.nio.file.Paths;
28import java.util.ArrayList;
29import java.util.List;
30
31public class SearchPath {
32    private final List<Path> searchPaths = new ArrayList<>();
33    private final FileSupport fileSupport;
34
35    public SearchPath() {
36        this(new FileSupport());
37    }
38
39    public SearchPath(FileSupport fileSupport) {
40        this.fileSupport = fileSupport;
41    }
42
43    public Path find(FileSystem fileSystem, Path entry, String... defaults) {
44        if (isAbsolute(entry)) {
45            if (exists(entry)) {
46                return entry;
47            }
48            return null;
49        }
50
51        if (exists(entry)) {
52            return entry;
53        }
54
55        for (String searchPath : defaults) {
56            Path newPath = fileSystem.getPath(searchPath, entry.toString());
57            if (exists(newPath)) {
58                return newPath;
59            }
60        }
61
62        for (Path searchPath : searchPaths) {
63            Path newPath = fileSystem.getPath(searchPath.toString(), entry.toString());
64            if (exists(newPath)) {
65                return newPath;
66            }
67        }
68
69        return null;
70    }
71
72    private boolean isAbsolute(Path entry) {
73        return fileSupport.isAbsolute(entry);
74    }
75
76    private boolean exists(Path entry) {
77        return fileSupport.exists(entry);
78    }
79
80    public void add(String... paths) {
81        for (String name : paths) {
82            Path path = Paths.get(name);
83            searchPaths.add(path);
84        }
85    }
86}
87
88