1 /* 2 * Copyright (C) 2006 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 // 18 // Access a chunk of the asset hierarchy as if it were a single directory. 19 // 20 #ifndef __LIBS_ASSETDIR_H 21 #define __LIBS_ASSETDIR_H 22 23 #include <androidfw/misc.h> 24 #include <utils/String8.h> 25 #include <utils/Vector.h> 26 #include <utils/SortedVector.h> 27 #include <sys/types.h> 28 29 namespace android { 30 31 /* 32 * This provides vector-style access to a directory. We do this rather 33 * than modeling opendir/readdir access because it's simpler and the 34 * nature of the operation requires us to have all data on hand anyway. 35 * 36 * The list of files will be sorted in ascending order by ASCII value. 37 * 38 * The contents are populated by our friend, the AssetManager. 39 */ 40 class AssetDir { 41 public: AssetDir(void)42 AssetDir(void) 43 : mFileInfo(NULL) 44 {} ~AssetDir(void)45 virtual ~AssetDir(void) { 46 delete mFileInfo; 47 } 48 49 /* 50 * Vector-style access. 51 */ getFileCount(void)52 size_t getFileCount(void) { return mFileInfo->size(); } getFileName(int idx)53 const String8& getFileName(int idx) { 54 return mFileInfo->itemAt(idx).getFileName(); 55 } getSourceName(int idx)56 const String8& getSourceName(int idx) { 57 return mFileInfo->itemAt(idx).getSourceName(); 58 } 59 60 /* 61 * Get the type of a file (usually regular or directory). 62 */ getFileType(int idx)63 FileType getFileType(int idx) { 64 return mFileInfo->itemAt(idx).getFileType(); 65 } 66 67 private: 68 /* these operations are not implemented */ 69 AssetDir(const AssetDir& src); 70 const AssetDir& operator=(const AssetDir& src); 71 72 friend class AssetManager; 73 friend class AssetManager2; 74 75 /* 76 * This holds information about files in the asset hierarchy. 77 */ 78 class FileInfo { 79 public: FileInfo(void)80 FileInfo(void) {} FileInfo(const String8 & path)81 FileInfo(const String8& path) // useful for e.g. svect.indexOf 82 : mFileName(path), mFileType(kFileTypeUnknown) 83 {} ~FileInfo(void)84 ~FileInfo(void) {} FileInfo(const FileInfo & src)85 FileInfo(const FileInfo& src) { 86 copyMembers(src); 87 } 88 const FileInfo& operator= (const FileInfo& src) { 89 if (this != &src) 90 copyMembers(src); 91 return *this; 92 } 93 copyMembers(const FileInfo & src)94 void copyMembers(const FileInfo& src) { 95 mFileName = src.mFileName; 96 mFileType = src.mFileType; 97 mSourceName = src.mSourceName; 98 } 99 100 /* need this for SortedVector; must compare only on file name */ 101 bool operator< (const FileInfo& rhs) const { 102 return mFileName < rhs.mFileName; 103 } 104 105 /* used by AssetManager */ 106 bool operator== (const FileInfo& rhs) const { 107 return mFileName == rhs.mFileName; 108 } 109 set(const String8 & path,FileType type)110 void set(const String8& path, FileType type) { 111 mFileName = path; 112 mFileType = type; 113 } 114 getFileName(void)115 const String8& getFileName(void) const { return mFileName; } setFileName(const String8 & path)116 void setFileName(const String8& path) { mFileName = path; } 117 getFileType(void)118 FileType getFileType(void) const { return mFileType; } setFileType(FileType type)119 void setFileType(FileType type) { mFileType = type; } 120 getSourceName(void)121 const String8& getSourceName(void) const { return mSourceName; } setSourceName(const String8 & path)122 void setSourceName(const String8& path) { mSourceName = path; } 123 124 /* 125 * Handy utility for finding an entry in a sorted vector of FileInfo. 126 * Returns the index of the matching entry, or -1 if none found. 127 */ 128 static int findEntry(const SortedVector<FileInfo>* pVector, 129 const String8& fileName); 130 131 private: 132 String8 mFileName; // filename only 133 FileType mFileType; // regular, directory, etc 134 135 String8 mSourceName; // currently debug-only 136 }; 137 138 /* AssetManager uses this to initialize us */ setFileList(SortedVector<FileInfo> * list)139 void setFileList(SortedVector<FileInfo>* list) { mFileInfo = list; } 140 141 SortedVector<FileInfo>* mFileInfo; 142 }; 143 144 }; // namespace android 145 146 #endif // __LIBS_ASSETDIR_H 147