gecko/dom/indexedDB/IDBKeyRange.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
2012-05-21 04:12:37 -07:00
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_indexeddb_idbkeyrange_h__
#define mozilla_dom_indexeddb_idbkeyrange_h__
#include "mozilla/dom/indexedDB/IndexedDatabase.h"
#include "mozilla/dom/indexedDB/Key.h"
#include "nsIIDBKeyRange.h"
#include "nsCycleCollectionParticipant.h"
class mozIStorageStatement;
BEGIN_INDEXEDDB_NAMESPACE
namespace ipc {
class KeyRange;
} // namespace ipc
class IDBKeyRange MOZ_FINAL : public nsIIDBKeyRange
{
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_NSIIDBKEYRANGE
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(IDBKeyRange)
static bool DefineConstructors(JSContext* aCx,
JSObject* aObject);
static nsresult FromJSVal(JSContext* aCx,
const jsval& aVal,
IDBKeyRange** aKeyRange);
template <class T>
static already_AddRefed<IDBKeyRange>
FromSerializedKeyRange(const T& aKeyRange);
IDBKeyRange(bool aLowerOpen,
bool aUpperOpen,
bool aIsOnly)
: mCachedLowerVal(JSVAL_VOID), mCachedUpperVal(JSVAL_VOID),
mLowerOpen(aLowerOpen), mUpperOpen(aUpperOpen), mIsOnly(aIsOnly),
mHaveCachedLowerVal(false), mHaveCachedUpperVal(false), mRooted(false)
{ }
const Key& Lower() const
{
return mLower;
}
Key& Lower()
{
return mLower;
}
const Key& Upper() const
{
return mIsOnly ? mLower : mUpper;
}
Key& Upper()
{
return mIsOnly ? mLower : mUpper;
}
bool IsLowerOpen() const
{
return mLowerOpen;
}
bool IsUpperOpen() const
{
return mUpperOpen;
}
bool IsOnly() const
{
return mIsOnly;
}
void GetBindingClause(const nsACString& aKeyColumnName,
nsACString& _retval) const
{
NS_NAMED_LITERAL_CSTRING(andStr, " AND ");
NS_NAMED_LITERAL_CSTRING(spacecolon, " :");
NS_NAMED_LITERAL_CSTRING(lowerKey, "lower_key");
if (IsOnly()) {
// Both keys are set and they're equal.
_retval = andStr + aKeyColumnName + NS_LITERAL_CSTRING(" =") +
spacecolon + lowerKey;
}
else {
nsAutoCString clause;
if (!Lower().IsUnset()) {
// Lower key is set.
clause.Append(andStr + aKeyColumnName);
clause.AppendLiteral(" >");
if (!IsLowerOpen()) {
clause.AppendLiteral("=");
}
clause.Append(spacecolon + lowerKey);
}
if (!Upper().IsUnset()) {
// Upper key is set.
clause.Append(andStr + aKeyColumnName);
clause.AppendLiteral(" <");
if (!IsUpperOpen()) {
clause.AppendLiteral("=");
}
clause.Append(spacecolon + NS_LITERAL_CSTRING("upper_key"));
}
_retval = clause;
}
}
nsresult BindToStatement(mozIStorageStatement* aStatement) const
{
NS_NAMED_LITERAL_CSTRING(lowerKey, "lower_key");
if (IsOnly()) {
return Lower().BindToStatement(aStatement, lowerKey);
}
nsresult rv;
if (!Lower().IsUnset()) {
rv = Lower().BindToStatement(aStatement, lowerKey);
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
}
if (!Upper().IsUnset()) {
rv = Upper().BindToStatement(aStatement, NS_LITERAL_CSTRING("upper_key"));
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
}
return NS_OK;
}
template <class T>
void ToSerializedKeyRange(T& aKeyRange);
void DropJSObjects();
private:
~IDBKeyRange();
Key mLower;
Key mUpper;
JS::Heap<JS::Value> mCachedLowerVal;
JS::Heap<JS::Value> mCachedUpperVal;
bool mLowerOpen;
bool mUpperOpen;
bool mIsOnly;
bool mHaveCachedLowerVal;
bool mHaveCachedUpperVal;
bool mRooted;
};
END_INDEXEDDB_NAMESPACE
#endif // mozilla_dom_indexeddb_idbkeyrange_h__