1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef AAPT_IO_FILESYSTEM_H
18 #define AAPT_IO_FILESYSTEM_H
19 
20 #include <map>
21 
22 #include "io/File.h"
23 
24 namespace aapt {
25 namespace io {
26 
27 /**
28  * A regular file from the file system. Uses mmap to open the data.
29  */
30 class RegularFile : public IFile {
31  public:
32   explicit RegularFile(const Source& source);
33 
34   std::unique_ptr<IData> OpenAsData() override;
35   const Source& GetSource() const override;
36 
37  private:
38   Source source_;
39 };
40 
41 class FileCollection;
42 
43 class FileCollectionIterator : public IFileCollectionIterator {
44  public:
45   explicit FileCollectionIterator(FileCollection* collection);
46 
47   bool HasNext() override;
48   io::IFile* Next() override;
49 
50  private:
51   std::map<std::string, std::unique_ptr<IFile>>::const_iterator current_, end_;
52 };
53 
54 /**
55  * An IFileCollection representing the file system.
56  */
57 class FileCollection : public IFileCollection {
58  public:
59   /**
60    * Adds a file located at path. Returns the IFile representation of that file.
61    */
62   IFile* InsertFile(const android::StringPiece& path);
63   IFile* FindFile(const android::StringPiece& path) override;
64   std::unique_ptr<IFileCollectionIterator> Iterator() override;
65 
66  private:
67   friend class FileCollectionIterator;
68   std::map<std::string, std::unique_ptr<IFile>> files_;
69 };
70 
71 }  // namespace io
72 }  // namespace aapt
73 
74 #endif  // AAPT_IO_FILESYSTEM_H
75