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