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 package jdk.tools.jaotc.collect;
  24 
  25 import java.nio.file.FileSystem;
  26 import java.nio.file.Path;
  27 import java.nio.file.Paths;
  28 import java.util.ArrayList;
  29 import java.util.List;
  30 
  31 public 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