content/common/indexed_db/indexed_db_key.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 CONTENT_COMMON_INDEXED_DB_INDEXED_DB_KEY_H_
   6 #define CONTENT_COMMON_INDEXED_DB_INDEXED_DB_KEY_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/logging.h"
  13 #include "base/strings/string16.h"
  14 #include "content/common/content_export.h"
  15 #include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBTypes.h"
  16
  17 namespace blink {
  18 class WebIDBKey;
  19 }
  20
  21 namespace content {
  22
  23 class CONTENT_EXPORT IndexedDBKey {
  24  public:
  25   typedef std::vector<IndexedDBKey> KeyArray;
  26
  27   IndexedDBKey();  // Defaults to blink::WebIDBKeyTypeInvalid.
  28   explicit IndexedDBKey(blink::WebIDBKeyType);  // must be Null or Invalid
  29   explicit IndexedDBKey(const KeyArray& array);
  30   explicit IndexedDBKey(const std::string& binary);
  31   explicit IndexedDBKey(const base::string16& string);
  32   IndexedDBKey(double number,
  33                blink::WebIDBKeyType type);  // must be date or number
  34   IndexedDBKey(const IndexedDBKey& other);
  35   ~IndexedDBKey();
  36   IndexedDBKey& operator=(const IndexedDBKey& other);
  37
  38   bool IsValid() const;
  39
  40   bool IsLessThan(const IndexedDBKey& other) const;
  41   bool Equals(const IndexedDBKey& other) const;
  42
  43   blink::WebIDBKeyType type() const { return type_; }
  44   const std::vector<IndexedDBKey>& array() const {
  45     DCHECK_EQ(type_, blink::WebIDBKeyTypeArray);
  46     return array_;
  47   }
  48   const std::string& binary() const {
  49     DCHECK_EQ(type_, blink::WebIDBKeyTypeBinary);
  50     return binary_;
  51   }
  52   const base::string16& string() const {
  53     DCHECK_EQ(type_, blink::WebIDBKeyTypeString);
  54     return string_;
  55   }
  56   double date() const {
  57     DCHECK_EQ(type_, blink::WebIDBKeyTypeDate);
  58     return number_;
  59   }
  60   double number() const {
  61     DCHECK_EQ(type_, blink::WebIDBKeyTypeNumber);
  62     return number_;
  63   }
  64
  65   size_t size_estimate() const { return size_estimate_; }
  66
  67  private:
  68   int CompareTo(const IndexedDBKey& other) const;
  69
  70   blink::WebIDBKeyType type_;
  71   std::vector<IndexedDBKey> array_;
  72   std::string binary_;
  73   base::string16 string_;
  74   double number_ = 0;
  75
  76   size_t size_estimate_;
  77 };
  78
  79 }  // namespace content
  80
  81 #endif  // CONTENT_COMMON_INDEXED_DB_INDEXED_DB_KEY_H_