/// <summary>
/// Method compares the downloaded data file to the existing data
/// file to check if the update is required. This will prevent file
/// switching if the data file was downloaded but is not newer than
/// the existing data file.
/// </summary>
/// <remarks>
/// The following conditions must be met for the data file to be
/// considered newer than the current master data file:
/// 1. Current master data file does not exist.
/// 2. If the published dates are not the same.
/// 3. If the number of properties is not the same.
/// </remarks>
/// <param name="binaryFile">
/// Current file to compare against.
/// </param>
/// <param name="decompressedTempFile">
/// Path to the decompressed downloaded file.
/// </param>
/// <returns>The current state of the update process.</returns>
private static AutoUpdateStatus ValidateDownloadedFile(
FileInfo binaryFile, FileInfo decompressedTempFile)
{
AutoUpdateStatus status = AutoUpdateStatus.AUTO_UPDATE_IN_PROGRESS;
if (decompressedTempFile.Exists)
{
// This will throw an exception if the downloaded data file
// can't be used to get the required attributes. The exception
// is a key part of the validation process.
DataSetAttributes tempAttrs = new DataSetAttributes(
decompressedTempFile);
// If the current binary file exists then compare the two for
// the same published date and same properties. If either value
// is different then the data file should be accepted. If
// they're the same then the update is not needed.
if (binaryFile.Exists)
{
DataSetAttributes binaryAttrs = new DataSetAttributes(
binaryFile);
if (binaryAttrs.Published != tempAttrs.Published ||
binaryAttrs.PropertyCount != tempAttrs.PropertyCount)
{
status = AutoUpdateStatus.AUTO_UPDATE_IN_PROGRESS;
}
else
{
status = AutoUpdateStatus.AUTO_UPDATE_NOT_NEEDED;
}
}
}
return(status);
}
/// <summary>
/// Method compares the downloaded data file to the existing data
/// file to check if the update is required. This will prevent file
/// switching if the data file was downloaded but is not newer than
/// the existing data file.
/// </summary>
/// <remarks>
/// The following conditions must be met for the data file to be
/// considered newer than the current master data file:
/// 1. Current master data file does not exist.
/// 2. If the published dates are not the same.
/// 3. If the number of properties is not the same.
/// </remarks>
/// <param name="binaryFile">
/// Current file to compare against.
/// </param>
/// <param name="decompressedTempFile">
/// Path to the decompressed downloaded file.
/// </param>
/// <returns>The current state of the update process.</returns>
private static AutoUpdateStatus ValidateDownloadedFile(
FileInfo binaryFile, FileInfo decompressedTempFile)
{
AutoUpdateStatus status = AutoUpdateStatus.AUTO_UPDATE_IN_PROGRESS;
if (decompressedTempFile.Exists)
{
// This will throw an exception if the downloaded data file
// can't be used to get the required attributes. The exception
// is a key part of the validation process.
DataSetAttributes tempAttrs = new DataSetAttributes(
decompressedTempFile);
// If the current binary file exists then compare the two for
// the same published date and same properties. If either value
// is different then the data file should be accepted. If
// they're the same then the update is not needed.
if (binaryFile.Exists)
{
DataSetAttributes binaryAttrs = new DataSetAttributes(
binaryFile);
if (binaryAttrs.Published != tempAttrs.Published ||
binaryAttrs.PropertyCount != tempAttrs.PropertyCount)
{
status = AutoUpdateStatus.AUTO_UPDATE_IN_PROGRESS;
}
else
{
status = AutoUpdateStatus.AUTO_UPDATE_NOT_NEEDED;
}
}
}
return status;
}
