pjs/dom/indexedDB/Key.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_key_h__
#define mozilla_dom_indexeddb_key_h__
#include "mozilla/dom/indexedDB/IndexedDatabase.h"
#include "mozIStorageStatement.h"
#include "xpcprivate.h"
#include "XPCQuickStubs.h"
BEGIN_INDEXEDDB_NAMESPACE
class Key
{
public:
Key()
{
Unset();
}
Key& operator=(const nsAString& aString)
{
SetFromString(aString);
return *this;
}
Key& operator=(PRInt64 aInt)
{
SetFromInteger(aInt);
return *this;
}
bool operator==(const Key& aOther) const
{
NS_ASSERTION(mType != KEYTYPE_VOID && aOther.mType != KEYTYPE_VOID,
"Don't compare unset keys!");
if (mType == aOther.mType) {
switch (mType) {
case KEYTYPE_STRING:
return ToString() == aOther.ToString();
case KEYTYPE_INTEGER:
return ToInteger() == aOther.ToInteger();
default:
NS_NOTREACHED("Unknown type!");
}
}
return false;
}
bool operator!=(const Key& aOther) const
{
return !(*this == aOther);
}
bool operator<(const Key& aOther) const
{
NS_ASSERTION(mType != KEYTYPE_VOID && aOther.mType != KEYTYPE_VOID,
"Don't compare unset keys!");
switch (mType) {
case KEYTYPE_STRING: {
if (aOther.mType == KEYTYPE_INTEGER) {
return false;
}
NS_ASSERTION(aOther.mType == KEYTYPE_STRING, "Unknown type!");
return ToString() < aOther.ToString();
}
case KEYTYPE_INTEGER:
if (aOther.mType == KEYTYPE_STRING) {
return true;
}
NS_ASSERTION(aOther.mType == KEYTYPE_INTEGER, "Unknown type!");
return ToInteger() < aOther.ToInteger();
default:
NS_NOTREACHED("Unknown type!");
}
return false;
}
bool operator>(const Key& aOther) const
{
return !(*this == aOther || *this < aOther);
}
bool operator<=(const Key& aOther) const
{
return (*this == aOther || *this < aOther);
}
bool operator>=(const Key& aOther) const
{
return (*this == aOther || !(*this < aOther));
}
void
Unset()
{
mType = KEYTYPE_VOID;
mStringKey.SetIsVoid(true);
mIntKey = 0;
}
bool IsUnset() const { return mType == KEYTYPE_VOID; }
bool IsString() const { return mType == KEYTYPE_STRING; }
bool IsInteger() const { return mType == KEYTYPE_INTEGER; }
nsresult SetFromString(const nsAString& aString)
{
mType = KEYTYPE_STRING;
mStringKey = aString;
mIntKey = 0;
return NS_OK;
}
nsresult SetFromInteger(PRInt64 aInt)
{
mType = KEYTYPE_INTEGER;
mStringKey.SetIsVoid(true);
mIntKey = aInt;
return NS_OK;
}
nsresult SetFromJSVal(JSContext* aCx,
jsval aVal)
{
if (JSVAL_IS_STRING(aVal)) {
jsval tempRoot = JSVAL_VOID;
SetFromString(xpc_qsAString(aCx, aVal, &tempRoot));
return NS_OK;
}
if (JSVAL_IS_INT(aVal)) {
SetFromInteger(JSVAL_TO_INT(aVal));
return NS_OK;
}
if (JSVAL_IS_DOUBLE(aVal)) {
jsdouble doubleActual = JSVAL_TO_DOUBLE(aVal);
int64 doubleAsInt = static_cast<int64>(doubleActual);
if (doubleActual == doubleAsInt) {
SetFromInteger(doubleAsInt);
return NS_OK;
}
}
if (JSVAL_IS_NULL(aVal) || JSVAL_IS_VOID(aVal)) {
Unset();
return NS_OK;
}
return NS_ERROR_DOM_INDEXEDDB_DATA_ERR;
}
nsresult ToJSVal(JSContext* aCx,
jsval* aVal) const
{
if (IsString()) {
nsString key = ToString();
if (!xpc_qsStringToJsval(aCx, key, aVal)) {
return NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR;
}
}
else if (IsInteger()) {
if (!JS_NewNumberValue(aCx, static_cast<jsdouble>(ToInteger()), aVal)) {
return NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR;
}
}
else if (IsUnset()) {
*aVal = JSVAL_VOID;
}
else {
NS_NOTREACHED("Unknown key type!");
}
return NS_OK;
}
PRInt64 ToInteger() const
{
NS_ASSERTION(IsInteger(), "Don't call me!");
return mIntKey;
}
const nsString& ToString() const
{
NS_ASSERTION(IsString(), "Don't call me!");
return mStringKey;
}
nsresult BindToStatement(mozIStorageStatement* aStatement,
const nsACString& aParamName) const
{
nsresult rv;
if (IsString()) {
rv = aStatement->BindStringByName(aParamName, ToString());
}
else if (IsInteger()) {
rv = aStatement->BindInt64ByName(aParamName, ToInteger());
}
else {
NS_NOTREACHED("Bad key!");
}
return NS_SUCCEEDED(rv) ? NS_OK : NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR;
}
nsresult SetFromStatement(mozIStorageStatement* aStatement,
PRUint32 aIndex)
{
PRInt32 columnType;
nsresult rv = aStatement->GetTypeOfIndex(aIndex, &columnType);
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
NS_ASSERTION(columnType == mozIStorageStatement::VALUE_TYPE_INTEGER ||
columnType == mozIStorageStatement::VALUE_TYPE_TEXT,
"Unsupported column type!");
return SetFromStatement(aStatement, aIndex, columnType);
}
nsresult SetFromStatement(mozIStorageStatement* aStatement,
PRUint32 aIndex,
PRInt32 aColumnType)
{
if (aColumnType == mozIStorageStatement::VALUE_TYPE_INTEGER) {
return SetFromInteger(aStatement->AsInt64(aIndex));
}
if (aColumnType == mozIStorageStatement::VALUE_TYPE_TEXT) {
nsString keyString;
nsresult rv = aStatement->GetString(aIndex, keyString);
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
return SetFromString(keyString);
}
NS_NOTREACHED("Unsupported column type!");
return NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR;
}
static
bool CanBeConstructedFromJSVal(jsval aVal)
{
return JSVAL_IS_INT(aVal) || JSVAL_IS_DOUBLE(aVal) || JSVAL_IS_STRING(aVal);
}
private:
// Wish we could use JSType here but we will end up supporting types like Date
// which JSType can't really identify. Rolling our own for now.
enum Type {
KEYTYPE_VOID,
KEYTYPE_STRING,
KEYTYPE_INTEGER
};
// Type of value in mJSVal.
Type mType;
// The string if mType is KEYTYPE_STRING, otherwise a void string.
nsString mStringKey;
// The integer value if mType is KEYTYPE_INTEGER, otherwise 0.
int64 mIntKey;
};
END_INDEXEDDB_NAMESPACE
#endif /* mozilla_dom_indexeddb_key_h__ */