public void CanEditAlreadyExistingFile()
{
// Arrange
var filePath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
var famosFileHeader = new FamosFileHeader();
var components = new List <FamosFileComponent>()
{
new FamosFileAnalogComponent("C1", FamosFileDataType.Float64, 5)
};
famosFileHeader.Fields.Add(new FamosFileField(FamosFileFieldType.MultipleYToSingleEquidistantTime, components));
famosFileHeader.Channels.Add(components.First().Channels.First());
famosFileHeader.Save(filePath, writer => famosFileHeader.WriteSingle(writer, components.First(), new double[] { 0, 0, 0, 0, 0 }));
// Act
/* write data */
var expected = new double[] { 1, 2, 3, 4, 5 };
using (var famosFile = FamosFile.OpenEditable(filePath))
{
var component = famosFile.Fields.First().Components.First();
famosFile.Edit(writer => famosFile.WriteSingle(writer, component, expected));
}
/* read data */
using var famosFile2 = FamosFile.Open(filePath);
var channelData = famosFile2.ReadSingle(famosFile2.Channels.First());
var actual = ((FamosFileComponentData <double>)channelData.ComponentsData.First()).Data.ToArray();
// Assert
Assert.Equal(expected, actual);
}
private void OpenFile(string dataFilePath, DateTime startDateTime, List <ChannelContextGroup> channelContextGroupSet)
{
if (File.Exists(dataFilePath))
{
throw new Exception($"The file {dataFilePath} already exists. Extending an already existing file with additional channels is not supported.");
}
var famosFile = new FamosFileHeader();
// file
var metadataGroup = new FamosFileGroup("Metadata");
metadataGroup.PropertyInfo = new FamosFilePropertyInfo(new List <FamosFileProperty>()
{
new FamosFileProperty("format_version", this.FormatVersion),
new FamosFileProperty("system_name", this.DataWriterContext.SystemName),
new FamosFileProperty("date_time", startDateTime),
});
foreach (var customMetadataEntry in this.DataWriterContext.CustomMetadataEntrySet.Where(customMetadataEntry => customMetadataEntry.CustomMetadataEntryLevel == CustomMetadataEntryLevel.File))
{
metadataGroup.PropertyInfo.Properties.Add(new FamosFileProperty(customMetadataEntry.Key, customMetadataEntry.Value));
}
famosFile.Groups.Add(metadataGroup);
// file -> project
var projectGroup = new FamosFileGroup($"{this.DataWriterContext.ProjectDescription.PrimaryGroupName} / {this.DataWriterContext.ProjectDescription.SecondaryGroupName} / {this.DataWriterContext.ProjectDescription.ProjectName}");
projectGroup.PropertyInfo = new FamosFilePropertyInfo(new List <FamosFileProperty>()
{
new FamosFileProperty("project_version", this.DataWriterContext.ProjectDescription.Version)
});
foreach (var customMetadataEntry in this.DataWriterContext.CustomMetadataEntrySet.Where(customMetadataEntry => customMetadataEntry.CustomMetadataEntryLevel == CustomMetadataEntryLevel.Project))
{
projectGroup.PropertyInfo.Properties.Add(new FamosFileProperty(customMetadataEntry.Key, customMetadataEntry.Value));
}
famosFile.Groups.Add(projectGroup);
// for each context group
foreach (var contextGroup in channelContextGroupSet)
{
var totalSeconds = (int)Math.Round(_settings.FilePeriod.TotalSeconds, MidpointRounding.AwayFromZero);
var totalLength = (int)(totalSeconds * contextGroup.SampleRate.SamplesPerSecond);
if (totalLength * (double)NexusUtilities.SizeOf(NexusDataType.FLOAT64) > 2 * Math.Pow(10, 9))
{
throw new Exception(ErrorMessage.FamosWriter_DataSizeExceedsLimit);
}
// file -> project -> channels
var field = new FamosFileField(FamosFileFieldType.MultipleYToSingleEquidistantTime);
foreach (ChannelContext channelContext in contextGroup.ChannelContextSet)
{
var dx = contextGroup.SampleRate.Period.TotalSeconds;
var channel = this.PrepareChannel(field, channelContext.ChannelDescription, (int)totalLength, startDateTime, dx);
projectGroup.Channels.Add(channel);
}
famosFile.Fields.Add(field);
_spdToFieldIndexMap[contextGroup.SampleRate.SamplesPerDay] = famosFile.Fields.Count - 1;
}
//
famosFile.Save(dataFilePath, _ => { });
_famosFile = FamosFile.OpenEditable(dataFilePath);
}