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      1 // Copyright (c) 2012 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 COMPONENTS_WEBDATA_COMMON_WEB_DATA_RESULTS_H_
      6 #define COMPONENTS_WEBDATA_COMMON_WEB_DATA_RESULTS_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/callback.h"
     10 #include "components/webdata/common/webdata_export.h"
     11 
     12 class WDTypedResult;
     13 
     14 //
     15 // Result types for WebDataService.
     16 //
     17 typedef enum {
     18   BOOL_RESULT = 1,             // WDResult<bool>
     19   KEYWORDS_RESULT,             // WDResult<WDKeywordsResult>
     20   INT64_RESULT,                // WDResult<int64>
     21 #if defined(OS_WIN)
     22   PASSWORD_IE7_RESULT,         // WDResult<IE7PasswordInfo>
     23 #endif
     24   WEB_APP_IMAGES,              // WDResult<WDAppImagesResult>
     25   TOKEN_RESULT,                // WDResult<std::vector<std::string>>
     26   AUTOFILL_VALUE_RESULT,       // WDResult<std::vector<base::string16>>
     27   AUTOFILL_CHANGES,            // WDResult<std::vector<AutofillChange>>
     28   AUTOFILL_PROFILE_RESULT,     // WDResult<AutofillProfile>
     29   AUTOFILL_PROFILES_RESULT,    // WDResult<std::vector<AutofillProfile*>>
     30   AUTOFILL_CREDITCARD_RESULT,  // WDResult<CreditCard>
     31   AUTOFILL_CREDITCARDS_RESULT, // WDResult<std::vector<CreditCard*>>
     32   WEB_INTENTS_RESULT,          // WDResult<std::vector<WebIntentServiceData>>
     33   WEB_INTENTS_DEFAULTS_RESULT, // WDResult<std::vector<DefaultWebIntentService>>
     34 } WDResultType;
     35 
     36 
     37 typedef base::Callback<void(const WDTypedResult*)> DestroyCallback;
     38 
     39 //
     40 // The top level class for a result.
     41 //
     42 class WEBDATA_EXPORT WDTypedResult {
     43  public:
     44   virtual ~WDTypedResult() {
     45   }
     46 
     47   // Return the result type.
     48   WDResultType GetType() const {
     49     return type_;
     50   }
     51 
     52   virtual void Destroy() {
     53   }
     54 
     55  protected:
     56   explicit WDTypedResult(WDResultType type)
     57     : type_(type) {
     58   }
     59 
     60  private:
     61   WDResultType type_;
     62   DISALLOW_COPY_AND_ASSIGN(WDTypedResult);
     63 };
     64 
     65 // A result containing one specific pointer or literal value.
     66 template <class T> class WDResult : public WDTypedResult {
     67  public:
     68   WDResult(WDResultType type, const T& v)
     69       : WDTypedResult(type), value_(v) {
     70   }
     71 
     72   virtual ~WDResult() {
     73   }
     74 
     75   // Return a single value result.
     76   T GetValue() const {
     77     return value_;
     78   }
     79 
     80  private:
     81   T value_;
     82 
     83   DISALLOW_COPY_AND_ASSIGN(WDResult);
     84 };
     85 
     86 template <class T> class WDDestroyableResult : public WDTypedResult {
     87  public:
     88   WDDestroyableResult(
     89       WDResultType type,
     90       const T& v,
     91       const DestroyCallback& callback)
     92       : WDTypedResult(type),
     93         value_(v),
     94         callback_(callback) {
     95   }
     96 
     97   virtual ~WDDestroyableResult() {
     98   }
     99 
    100 
    101   virtual void Destroy()  OVERRIDE {
    102     if (!callback_.is_null()) {
    103       callback_.Run(this);
    104     }
    105   }
    106 
    107   // Return a single value result.
    108   T GetValue() const {
    109     return value_;
    110   }
    111 
    112  private:
    113   T value_;
    114   DestroyCallback callback_;
    115 
    116   DISALLOW_COPY_AND_ASSIGN(WDDestroyableResult);
    117 };
    118 
    119 template <class T> class WDObjectResult : public WDTypedResult {
    120  public:
    121   explicit WDObjectResult(WDResultType type)
    122     : WDTypedResult(type) {
    123   }
    124 
    125   T* GetValue() const {
    126     return &value_;
    127   }
    128 
    129  private:
    130   // mutable to keep GetValue() const.
    131   mutable T value_;
    132   DISALLOW_COPY_AND_ASSIGN(WDObjectResult);
    133 };
    134 
    135 #endif  // COMPONENTS_WEBDATA_COMMON_WEB_DATA_RESULTS_H_
    136