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 } WDResultType;
  33
  34
  35 typedef base::Callback<void(const WDTypedResult*)> DestroyCallback;
  36
  37 //
  38 // The top level class for a result.
  39 //
  40 class WEBDATA_EXPORT WDTypedResult {
  41  public:
  42   virtual ~WDTypedResult() {
  43   }
  44
  45   // Return the result type.
  46   WDResultType GetType() const {
  47     return type_;
  48   }
  49
  50   virtual void Destroy() {
  51   }
  52
  53  protected:
  54   explicit WDTypedResult(WDResultType type)
  55     : type_(type) {
  56   }
  57
  58  private:
  59   WDResultType type_;
  60   DISALLOW_COPY_AND_ASSIGN(WDTypedResult);
  61 };
  62
  63 // A result containing one specific pointer or literal value.
  64 template <class T> class WDResult : public WDTypedResult {
  65  public:
  66   WDResult(WDResultType type, const T& v)
  67       : WDTypedResult(type), value_(v) {
  68   }
  69
  70   virtual ~WDResult() {
  71   }
  72
  73   // Return a single value result.
  74   T GetValue() const {
  75     return value_;
  76   }
  77
  78  private:
  79   T value_;
  80
  81   DISALLOW_COPY_AND_ASSIGN(WDResult);
  82 };
  83
  84 template <class T> class WDDestroyableResult : public WDTypedResult {
  85  public:
  86   WDDestroyableResult(
  87       WDResultType type,
  88       const T& v,
  89       const DestroyCallback& callback)
  90       : WDTypedResult(type),
  91         value_(v),
  92         callback_(callback) {
  93   }
  94
  95   virtual ~WDDestroyableResult() {
  96   }
  97
  98
  99   virtual void Destroy()  override {
 100     if (!callback_.is_null()) {
 101       callback_.Run(this);
 102     }
 103   }
 104
 105   // Return a single value result.
 106   T GetValue() const {
 107     return value_;
 108   }
 109
 110  private:
 111   T value_;
 112   DestroyCallback callback_;
 113
 114   DISALLOW_COPY_AND_ASSIGN(WDDestroyableResult);
 115 };
 116
 117 template <class T> class WDObjectResult : public WDTypedResult {
 118  public:
 119   explicit WDObjectResult(WDResultType type)
 120     : WDTypedResult(type) {
 121   }
 122
 123   T* GetValue() const {
 124     return &value_;
 125   }
 126
 127  private:
 128   // mutable to keep GetValue() const.
 129   mutable T value_;
 130   DISALLOW_COPY_AND_ASSIGN(WDObjectResult);
 131 };
 132
 133 #endif  // COMPONENTS_WEBDATA_COMMON_WEB_DATA_RESULTS_H_