components/webdata/common/web_data_results.h

   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_