gecko-dev/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: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Indexed Database.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Ben Turner <bent.mozilla@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#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
class IDBKeyRange : public nsIIDBKeyRange
{
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_NSIIDBKEYRANGE
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(IDBKeyRange)
static JSBool DefineConstructors(JSContext* aCx,
JSObject* aObject);
static
nsresult FromJSVal(JSContext* aCx,
const jsval& aVal,
IDBKeyRange** 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 {
nsCAutoString 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;
}
protected:
~IDBKeyRange() { }
Key mLower;
Key mUpper;
jsval mCachedLowerVal;
jsval mCachedUpperVal;
bool mLowerOpen;
bool mUpperOpen;
bool mIsOnly;
bool mHaveCachedLowerVal;
bool mHaveCachedUpperVal;
bool mRooted;
};
END_INDEXEDDB_NAMESPACE
#endif // mozilla_dom_indexeddb_idbkeyrange_h__