text: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef CONTENT_COMMON_INDEXED_DB_INDEXED_DB_KEY_H_
  #define CONTENT_COMMON_INDEXED_DB_INDEXED_DB_KEY_H_
  
  #include <vector>
  
  #include "base/basictypes.h"
  #include "base/memory/scoped_vector.h"
  #include "base/strings/string16.h"
  #include "content/common/content_export.h"
  #include "third_party/WebKit/public/platform/WebIDBTypes.h"
  
  namespace blink {
  class WebIDBKey;
  }
  
  namespace content {
  
  class CONTENT_EXPORT IndexedDBKey {
   public:
    typedef std::vector<IndexedDBKey> KeyArray;
  
    IndexedDBKey();  // Defaults to blink::WebIDBKeyTypeInvalid.
    explicit IndexedDBKey(blink::WebIDBKeyType);  // must be Null or Invalid
    explicit IndexedDBKey(const KeyArray& array);
    explicit IndexedDBKey(const std::string& binary);
    explicit IndexedDBKey(const base::string16& string);
    IndexedDBKey(double number,
                 blink::WebIDBKeyType type);  // must be date or number
    ~IndexedDBKey();
  
    IndexedDBKey(const IndexedDBKey& other);
    IndexedDBKey& operator=(const IndexedDBKey& other);
  
    bool IsValid() const;
  
    bool IsLessThan(const IndexedDBKey& other) const;
    bool Equals(const IndexedDBKey& other) const;
  
    blink::WebIDBKeyType type() const { return type_; }
    const std::vector<IndexedDBKey>& array() const { return array_; }
    const std::string& binary() const { return binary_; }
    const base::string16& string() const { return string_; }
    double date() const { return date_; }
    double number() const { return number_; }
  
    size_t size_estimate() const { return size_estimate_; }
  
   private:
    int CompareTo(const IndexedDBKey& other) const;
  
    blink::WebIDBKeyType type_;
    std::vector<IndexedDBKey> array_;
    std::string binary_;
    base::string16 string_;
    double date_;
    double number_;
  
    size_t size_estimate_;
  };
  
  }  // namespace content
  
  #endif  // CONTENT_COMMON_INDEXED_DB_INDEXED_DB_KEY_H_
  