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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef IDBKey_h
#define IDBKey_h
#if ENABLE(INDEXED_DATABASE)
#include "IndexedDB.h"
#include <wtf/Forward.h>
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>
#include <wtf/text/WTFString.h>
using WebCore::IndexedDB::KeyType;
namespace WebCore {
class IDBKey : public RefCounted<IDBKey> {
public:
static Ref<IDBKey> createInvalid()
{
return adoptRef(*new IDBKey());
}
static Ref<IDBKey> createNumber(double number)
{
return adoptRef(*new IDBKey(KeyType::Number, number));
}
static Ref<IDBKey> createString(const String& string)
{
return adoptRef(*new IDBKey(string));
}
static Ref<IDBKey> createDate(double date)
{
return adoptRef(*new IDBKey(KeyType::Date, date));
}
static PassRefPtr<IDBKey> createMultiEntryArray(const Vector<RefPtr<IDBKey>>& array)
{
Vector<RefPtr<IDBKey>> result;
size_t sizeEstimate = 0;
for (auto& key : array) {
if (!key->isValid())
continue;
bool skip = false;
for (auto& resultKey : result) {
if (key->isEqual(resultKey.get())) {
skip = true;
break;
}
}
if (!skip) {
result.append(key);
sizeEstimate += key->m_sizeEstimate;
}
}
RefPtr<IDBKey> idbKey = adoptRef(new IDBKey(result, sizeEstimate));
ASSERT(idbKey->isValid());
return idbKey.release();
}
static Ref<IDBKey> createArray(const Vector<RefPtr<IDBKey>>& array)
{
size_t sizeEstimate = 0;
for (auto& key : array)
sizeEstimate += key->m_sizeEstimate;
return adoptRef(*new IDBKey(array, sizeEstimate));
}
WEBCORE_EXPORT ~IDBKey();
KeyType type() const { return m_type; }
WEBCORE_EXPORT bool isValid() const;
const Vector<RefPtr<IDBKey>>& array() const
{
ASSERT(m_type == KeyType::Array);
return m_array;
}
const String& string() const
{
ASSERT(m_type == KeyType::String);
return m_string;
}
double date() const
{
ASSERT(m_type == KeyType::Date);
return m_number;
}
double number() const
{
ASSERT(m_type == KeyType::Number);
return m_number;
}
int compare(const IDBKey* other) const;
bool isLessThan(const IDBKey* other) const;
bool isEqual(const IDBKey* other) const;
size_t sizeEstimate() const { return m_sizeEstimate; }
static int compareTypes(KeyType a, KeyType b)
{
return b - a;
}
using RefCounted<IDBKey>::ref;
using RefCounted<IDBKey>::deref;
#ifndef NDEBUG
String loggingString() const;
#endif
private:
IDBKey() : m_type(KeyType::Invalid), m_number(0), m_sizeEstimate(OverheadSize) { }
IDBKey(KeyType type, double number) : m_type(type), m_number(number), m_sizeEstimate(OverheadSize + sizeof(double)) { }
explicit IDBKey(const String& value) : m_type(KeyType::String), m_string(value), m_number(0), m_sizeEstimate(OverheadSize + value.length() * sizeof(UChar)) { }
IDBKey(const Vector<RefPtr<IDBKey>>& keyArray, size_t arraySize) : m_type(KeyType::Array), m_array(keyArray), m_number(0), m_sizeEstimate(OverheadSize + arraySize) { }
const KeyType m_type;
const Vector<RefPtr<IDBKey>> m_array;
const String m_string;
const double m_number;
const size_t m_sizeEstimate;
// Very rough estimate of minimum key size overhead.
enum { OverheadSize = 16 };
};
}
#endif // ENABLE(INDEXED_DATABASE)
#endif // IDBKey_h
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