1 // Copyright 2013 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_PROFILE_RESETTER_JTL_INTERPRETER_H_ 6 #define CHROME_BROWSER_PROFILE_RESETTER_JTL_INTERPRETER_H_ 7 8 #include <string> 9 10 #include "base/basictypes.h" 11 #include "base/values.h" 12 13 // Executes a JTL program on a given dictionary. 14 // 15 // JTL (Json Traversal Language) programs are defined in jtl_foundation.h 16 class JtlInterpreter { 17 public: 18 enum Result { 19 OK, 20 PARSE_ERROR, 21 RUNTIME_ERROR, 22 RESULT_MAX, 23 }; 24 25 // |hasher_seed| is a value used in jtl_foundation::Hasher. All node names, 26 // strings, integers and doubles are hashed before being compared to hash 27 // values listed in |program|. 28 // |program| is a byte array containing a JTL program. 29 // |input| is a dictionary on which the program is evaluated. 30 JtlInterpreter(const std::string& hasher_seed, 31 const std::string& program, 32 const DictionaryValue* input); 33 ~JtlInterpreter(); 34 35 void Execute(); 36 result()37 Result result() const { return result_; } working_memory()38 const DictionaryValue* working_memory() const { 39 return working_memory_.get(); 40 } 41 bool GetOutputBoolean(const std::string& unhashed_key, bool* output) const; 42 bool GetOutputString(const std::string& unhashed_key, 43 std::string* output) const; 44 45 private: 46 // Input. 47 std::string hasher_seed_; 48 std::string program_; 49 const DictionaryValue* input_; 50 // Output. 51 scoped_ptr<DictionaryValue> working_memory_; 52 Result result_; 53 54 DISALLOW_COPY_AND_ASSIGN(JtlInterpreter); 55 }; 56 57 #endif // CHROME_BROWSER_PROFILE_RESETTER_JTL_INTERPRETER_H_ 58