storage/src/mozStorageStatementRow.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
   3  * ***** BEGIN LICENSE BLOCK *****
   4  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version
   7  * 1.1 (the "License"); you may not use this file except in compliance with
   8  * the License. You may obtain a copy of the License at
   9  * http://www.mozilla.org/MPL/
  10  *
  11  * Software distributed under the License is distributed on an "AS IS" basis,
  12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  13  * for the specific language governing rights and limitations under the
  14  * License.
  15  *
  16  * The Original Code is Oracle Corporation code.
  17  *
  18  * The Initial Developer of the Original Code is
  19  *  Oracle Corporation
  20  * Portions created by the Initial Developer are Copyright (C) 2004
  21  * the Initial Developer. All Rights Reserved.
  22  *
  23  * Contributor(s):
  24  *   Vladimir Vukicevic <vladimir.vukicevic@oracle.com>
  25  *   Shawn Wilsher <me@shawnwilsher.com>
  26  *
  27  * Alternatively, the contents of this file may be used under the terms of
  28  * either the GNU General Public License Version 2 or later (the "GPL"), or
  29  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  30  * in which case the provisions of the GPL or the LGPL are applicable instead
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  33  * use your version of this file under the terms of the MPL, indicate your
  34  * decision by deleting the provisions above and replace them with the notice
  35  * and other provisions required by the GPL or the LGPL. If you do not delete
  36  * the provisions above, a recipient may use your version of this file under
  37  * the terms of any one of the MPL, the GPL or the LGPL.
  38  *
  39  * ***** END LICENSE BLOCK ***** */
  40
  41 #include "nsMemory.h"
  42 #include "nsString.h"
  43
  44 #include "mozStorageStatementRow.h"
  45 #include "mozStorageStatement.h"
  46
  47 #include "jsapi.h"
  48 #include "jsdate.h"
  49
  50 namespace mozilla {
  51 namespace storage {
  52
  53 ////////////////////////////////////////////////////////////////////////////////
  54 //// StatementRow
  55
  56 StatementRow::StatementRow(Statement *aStatement)
  57 : mStatement(aStatement)
  58 {
  59 }
  60
  61 NS_IMPL_ISUPPORTS2(
  62   StatementRow,
  63   mozIStorageStatementRow,
  64   nsIXPCScriptable
  65 )
  66
  67 ////////////////////////////////////////////////////////////////////////////////
  68 //// nsIXPCScriptable
  69
  70 #define XPC_MAP_CLASSNAME StatementRow
  71 #define XPC_MAP_QUOTED_CLASSNAME "StatementRow"
  72 #define XPC_MAP_WANT_GETPROPERTY
  73 #define XPC_MAP_WANT_NEWRESOLVE
  74 #define XPC_MAP_FLAGS nsIXPCScriptable::ALLOW_PROP_MODS_DURING_RESOLVE
  75 #include "xpc_map_end.h"
  76
  77 NS_IMETHODIMP
  78 StatementRow::GetProperty(nsIXPConnectWrappedNative *aWrapper,
  79                           JSContext *aCtx,
  80                           JSObject *aScopeObj,
  81                           jsid aId,
  82                           jsval *_vp,
  83                           PRBool *_retval)
  84 {
  85   NS_ENSURE_TRUE(mStatement, NS_ERROR_NOT_INITIALIZED);
  86
  87   if (JSID_IS_STRING(aId)) {
  88     ::JSAutoByteString idBytes(aCtx, JSID_TO_STRING(aId));
  89     NS_ENSURE_TRUE(!!idBytes, NS_ERROR_OUT_OF_MEMORY);
  90     nsDependentCString jsid(idBytes.ptr());
  91
  92     PRUint32 idx;
  93     nsresult rv = mStatement->GetColumnIndex(jsid, &idx);
  94     NS_ENSURE_SUCCESS(rv, rv);
  95     PRInt32 type;
  96     rv = mStatement->GetTypeOfIndex(idx, &type);
  97     NS_ENSURE_SUCCESS(rv, rv);
  98
  99     if (type == mozIStorageValueArray::VALUE_TYPE_INTEGER ||
 100         type == mozIStorageValueArray::VALUE_TYPE_FLOAT) {
 101       double dval;
 102       rv = mStatement->GetDouble(idx, &dval);
 103       NS_ENSURE_SUCCESS(rv, rv);
 104       if (!::JS_NewNumberValue(aCtx, dval, _vp)) {
 105         *_retval = PR_FALSE;
 106         return NS_OK;
 107       }
 108     }
 109     else if (type == mozIStorageValueArray::VALUE_TYPE_TEXT) {
 110       PRUint32 bytes;
 111       const jschar *sval = reinterpret_cast<const jschar *>(
 112         static_cast<mozIStorageStatement *>(mStatement)->
 113           AsSharedWString(idx, &bytes)
 114       );
 115       JSString *str = ::JS_NewUCStringCopyN(aCtx, sval, bytes / 2);
 116       if (!str) {
 117         *_retval = PR_FALSE;
 118         return NS_OK;
 119       }
 120       *_vp = STRING_TO_JSVAL(str);
 121     }
 122     else if (type == mozIStorageValueArray::VALUE_TYPE_BLOB) {
 123       PRUint32 length;
 124       const PRUint8 *blob = static_cast<mozIStorageStatement *>(mStatement)->
 125         AsSharedBlob(idx, &length);
 126       JSObject *obj = ::JS_NewArrayObject(aCtx, length, nsnull);
 127       if (!obj) {
 128         *_retval = PR_FALSE;
 129         return NS_OK;
 130       }
 131       *_vp = OBJECT_TO_JSVAL(obj);
 132
 133       // Copy the blob over to the JS array.
 134       for (PRUint32 i = 0; i < length; i++) {
 135         jsval val = INT_TO_JSVAL(blob[i]);
 136         if (!::JS_SetElement(aCtx, aScopeObj, i, &val)) {
 137           *_retval = PR_FALSE;
 138           return NS_OK;
 139         }
 140       }
 141     }
 142     else if (type == mozIStorageValueArray::VALUE_TYPE_NULL) {
 143       *_vp = JSVAL_NULL;
 144     }
 145     else {
 146       NS_ERROR("unknown column type returned, what's going on?");
 147     }
 148   }
 149
 150   return NS_OK;
 151 }
 152
 153 NS_IMETHODIMP
 154 StatementRow::NewResolve(nsIXPConnectWrappedNative *aWrapper,
 155                          JSContext *aCtx,
 156                          JSObject *aScopeObj,
 157                          jsid aId,
 158                          PRUint32 aFlags,
 159                          JSObject **_objp,
 160                          PRBool *_retval)
 161 {
 162   NS_ENSURE_TRUE(mStatement, NS_ERROR_NOT_INITIALIZED);
 163   // We do not throw at any point after this because we want to allow the
 164   // prototype chain to be checked for the property.
 165
 166   if (JSID_IS_STRING(aId)) {
 167     ::JSAutoByteString idBytes(aCtx, JSID_TO_STRING(aId));
 168     NS_ENSURE_TRUE(!!idBytes, NS_ERROR_OUT_OF_MEMORY);
 169     nsDependentCString name(idBytes.ptr());
 170
 171     PRUint32 idx;
 172     nsresult rv = mStatement->GetColumnIndex(name, &idx);
 173     if (NS_FAILED(rv)) {
 174       // It's highly likely that the name doesn't exist, so let the JS engine
 175       // check the prototype chain and throw if that doesn't have the property
 176       // either.
 177       *_objp = NULL;
 178       return NS_OK;
 179     }
 180
 181     *_retval = ::JS_DefinePropertyById(aCtx, aScopeObj, aId, JSVAL_VOID,
 182                                      nsnull, nsnull, 0);
 183     *_objp = aScopeObj;
 184     return NS_OK;
 185   }
 186
 187   return NS_OK;
 188 }
 189
 190 } // namespace storage
 191 } // namescape mozilla