gecko/storage/src/mozStorageRow.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
 * ***** 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 mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Corporation
 * Portions created by the Initial Developer are Copyright (C) 2008
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Shawn Wilsher <me@shawnwilsher.com> (Original Author)
 *
 * 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
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 * decision by deleting the provisions above and replace them with the notice
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 * the provisions above, a recipient may use your version of this file under
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 *
 * ***** END LICENSE BLOCK ***** */

#include "nsString.h"

#include "sqlite3.h"
#include "mozStoragePrivateHelpers.h"
#include "Variant.h"
#include "mozStorageRow.h"

namespace mozilla {
namespace storage {

////////////////////////////////////////////////////////////////////////////////
//// Row

nsresult
Row::initialize(sqlite3_stmt *aStatement)
{
  // Initialize the hash table
  NS_ENSURE_TRUE(mNameHashtable.Init(), NS_ERROR_OUT_OF_MEMORY);

  // Get the number of results
  mNumCols = ::sqlite3_column_count(aStatement);

  // Start copying over values
  for (PRUint32 i = 0; i < mNumCols; i++) {
    // Store the value
    nsIVariant *variant = nsnull;
    int type = ::sqlite3_column_type(aStatement, i);
    switch (type) {
      case SQLITE_INTEGER:
        variant = new IntegerVariant(::sqlite3_column_int64(aStatement, i));
        break;
      case SQLITE_FLOAT:
        variant = new FloatVariant(::sqlite3_column_double(aStatement, i));
        break;
      case SQLITE_TEXT:
      {
        nsDependentString str(
          static_cast<const PRUnichar *>(::sqlite3_column_text16(aStatement, i))
        );
        variant = new TextVariant(str);
        break;
      }
      case SQLITE_NULL:
        variant = new NullVariant();
        break;
      case SQLITE_BLOB:
      {
        int size = ::sqlite3_column_bytes(aStatement, i);
        const void *data = ::sqlite3_column_blob(aStatement, i);
        variant = new BlobVariant(std::pair<const void *, int>(data, size));
        break;
      }
      default:
        return NS_ERROR_UNEXPECTED;
    }
    NS_ENSURE_TRUE(variant, NS_ERROR_OUT_OF_MEMORY);

    // Insert into our storage array
    NS_ENSURE_TRUE(mData.InsertObjectAt(variant, i), NS_ERROR_OUT_OF_MEMORY);

    // Associate the name (if any) with the index
    const char *name = ::sqlite3_column_name(aStatement, i);
    if (!name) break;
    nsCAutoString colName(name);
    mNameHashtable.Put(colName, i);
  }

  return NS_OK;
}

/**
 * Note:  This object is only ever accessed on one thread at a time.  It it not
 *        threadsafe, but it does need threadsafe AddRef and Release.
 */
NS_IMPL_THREADSAFE_ISUPPORTS2(
  Row,
  mozIStorageRow,
  mozIStorageValueArray
)

////////////////////////////////////////////////////////////////////////////////
//// mozIStorageRow

NS_IMETHODIMP
Row::GetResultByIndex(PRUint32 aIndex,
                      nsIVariant **_result)
{
  ENSURE_INDEX_VALUE(aIndex, mNumCols);
  NS_ADDREF(*_result = mData.ObjectAt(aIndex));
  return NS_OK;
}

NS_IMETHODIMP
Row::GetResultByName(const nsACString &aName,
                     nsIVariant **_result)
{
  PRUint32 index;
  NS_ENSURE_TRUE(mNameHashtable.Get(aName, &index), NS_ERROR_NOT_AVAILABLE);
  return GetResultByIndex(index, _result);
}

////////////////////////////////////////////////////////////////////////////////
//// mozIStorageValueArray

NS_IMETHODIMP
Row::GetNumEntries(PRUint32 *_entries)
{
  *_entries = mNumCols;
  return NS_OK;
}

NS_IMETHODIMP
Row::GetTypeOfIndex(PRUint32 aIndex,
                    PRInt32 *_type)
{
  ENSURE_INDEX_VALUE(aIndex, mNumCols);

  PRUint16 type;
  (void)mData.ObjectAt(aIndex)->GetDataType(&type);
  switch (type) {
    case nsIDataType::VTYPE_INT32:
    case nsIDataType::VTYPE_INT64:
      *_type = mozIStorageValueArray::VALUE_TYPE_INTEGER;
      break;
    case nsIDataType::VTYPE_DOUBLE:
      *_type = mozIStorageValueArray::VALUE_TYPE_FLOAT;
      break;
    case nsIDataType::VTYPE_ASTRING:
      *_type = mozIStorageValueArray::VALUE_TYPE_TEXT;
      break;
    case nsIDataType::VTYPE_ARRAY:
      *_type = mozIStorageValueArray::VALUE_TYPE_BLOB;
      break;
    default:
      *_type = mozIStorageValueArray::VALUE_TYPE_NULL;
      break;
  }
  return NS_OK;
}

NS_IMETHODIMP
Row::GetInt32(PRUint32 aIndex,
              PRInt32 *_value)
{
  ENSURE_INDEX_VALUE(aIndex, mNumCols);
  return mData.ObjectAt(aIndex)->GetAsInt32(_value);
}

NS_IMETHODIMP
Row::GetInt64(PRUint32 aIndex,
              PRInt64 *_value)
{
  ENSURE_INDEX_VALUE(aIndex, mNumCols);
  return mData.ObjectAt(aIndex)->GetAsInt64(_value);
}

NS_IMETHODIMP
Row::GetDouble(PRUint32 aIndex,
               double *_value)
{
  ENSURE_INDEX_VALUE(aIndex, mNumCols);
  return mData.ObjectAt(aIndex)->GetAsDouble(_value);
}

NS_IMETHODIMP
Row::GetUTF8String(PRUint32 aIndex,
                   nsACString &_value)
{
  ENSURE_INDEX_VALUE(aIndex, mNumCols);
  return mData.ObjectAt(aIndex)->GetAsAUTF8String(_value);
}

NS_IMETHODIMP
Row::GetString(PRUint32 aIndex,
               nsAString &_value)
{
  ENSURE_INDEX_VALUE(aIndex, mNumCols);
  return mData.ObjectAt(aIndex)->GetAsAString(_value);
}

NS_IMETHODIMP
Row::GetBlob(PRUint32 aIndex,
             PRUint32 *_size,
             PRUint8 **_blob)
{
  ENSURE_INDEX_VALUE(aIndex, mNumCols);

  PRUint16 type;
  nsIID interfaceIID;
  return mData.ObjectAt(aIndex)->GetAsArray(&type, &interfaceIID, _size,
                                            reinterpret_cast<void **>(_blob));
}

NS_IMETHODIMP
Row::GetIsNull(PRUint32 aIndex,
               PRBool *_isNull)
{
  ENSURE_INDEX_VALUE(aIndex, mNumCols);
  NS_ENSURE_ARG_POINTER(_isNull);

  PRUint16 type;
  (void)mData.ObjectAt(aIndex)->GetDataType(&type);
  *_isNull = type == nsIDataType::VTYPE_EMPTY;
  return NS_OK;
}

NS_IMETHODIMP
Row::GetSharedUTF8String(PRUint32,
                         PRUint32 *,
                         char const **)
{
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
Row::GetSharedString(PRUint32,
                     PRUint32 *,
                     const PRUnichar **)
{
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
Row::GetSharedBlob(PRUint32,
                   PRUint32 *,
                   const PRUint8 **)
{
  return NS_ERROR_NOT_IMPLEMENTED;
}

} // namespace storage
} // namespace mozilla