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 
  36     public SearchPath() {
  37         this(new FileSupport());
  38     }
  39 
  40     public SearchPath(FileSupport fileSupport) {
  41         this.fileSupport = fileSupport;
  42     }
  43 
  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 
  73     private boolean isAbsolute(Path entry) {
  74         return fileSupport.isAbsolute(entry);
  75     }
  76 
  77     private boolean exists(Path entry) {
  78         return fileSupport.exists(entry);
  79     }
  80 
  81     public void add(String... paths) {
  82         for (String name : paths) {
  83             Path path = Paths.get(name);
  84             searchPaths.add(path);
  85         }
  86     }
  87 }