1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_BROWSER_PARSERS_METADATA_PARSER_H_ 6 #define CHROME_BROWSER_PARSERS_METADATA_PARSER_H_ 7 #pragma once 8 9 #include <string> 10 11 class FilePath; 12 13 // Allows for Iteration on the Properties of a given file. 14 class MetadataPropertyIterator { 15 public: MetadataPropertyIterator()16 MetadataPropertyIterator() {} ~MetadataPropertyIterator()17 virtual ~MetadataPropertyIterator() {} 18 19 20 // Gets the next Property in the iterator. Returns false if at the end 21 // of the list. 22 virtual bool GetNext(std::string* key, std::string* value) = 0; 23 24 // Gets the number of Properties in this iterator. 25 virtual int Length() = 0; 26 27 // Checks to see if we're at the end of the list. 28 virtual bool IsEnd() = 0; 29 }; 30 31 // Represents a single instance of parsing on a particular file. 32 class MetadataParser { 33 public: MetadataParser(const FilePath & path)34 explicit MetadataParser(const FilePath& path) {} ~MetadataParser()35 virtual ~MetadataParser() {} 36 37 38 static const char* kPropertyType; 39 static const char* kPropertyFilesize; 40 static const char* kPropertyTitle; 41 42 // Does all the heavy work of parsing out the file. Blocking until complete. 43 virtual bool Parse() = 0; 44 45 // Gets a particular property found in a parse call. 46 virtual bool GetProperty(const std::string& key, std::string* value) = 0; 47 48 // Gets an interator allowing you to iterate over all the properties found 49 // in a parse call. 50 virtual MetadataPropertyIterator* GetPropertyIterator() = 0; 51 }; 52 53 #endif // CHROME_BROWSER_PARSERS_METADATA_PARSER_H_ 54