/// <summary>
/// Updates the metadata for a tag.
/// </summary>
private bool UpdateTagMetadata(
UnderlyingSystemTag tag,
Opc.Ua.Test.DataGenerator generator)
{
switch (tag.TagType)
{
case UnderlyingSystemTagType.Analog:
{
if (tag.EuRange != null)
{
double[] range = new double[tag.EuRange.Length];
for (int ii = 0; ii < tag.EuRange.Length; ii++)
{
range[ii] = tag.EuRange[ii] + 1;
}
tag.EuRange = range;
}
break;
}
case UnderlyingSystemTagType.Digital:
case UnderlyingSystemTagType.Enumerated:
{
if (tag.Labels != null)
{
string[] labels = new string[tag.Labels.Length];
for (int ii = 0; ii < tag.Labels.Length; ii++)
{
labels[ii] = generator.GetRandomString();
}
tag.Labels = labels;
}
break;
}
default:
{
return(false);
}
}
return(true);
}
/// <summary>
/// Updates the value of an tag.
/// </summary>
private bool UpdateTagValue(
UnderlyingSystemTag tag,
Opc.Ua.Test.DataGenerator generator)
{
// don't update writeable tags.
if (tag.IsWriteable)
{
return(false);
}
// check if a range applies to the value.
var high = 0;
var low = 0;
switch (tag.TagType)
{
case UnderlyingSystemTagType.Analog: {
if (tag.EuRange != null && tag.EuRange.Length >= 2)
{
high = (int)tag.EuRange[0];
low = (int)tag.EuRange[1];
}
break;
}
case UnderlyingSystemTagType.Digital: {
high = 1;
low = 0;
break;
}
case UnderlyingSystemTagType.Enumerated: {
if (tag.Labels != null && tag.Labels.Length > 0)
{
high = tag.Labels.Length - 1;
low = 0;
}
break;
}
}
// select a value in the range.
var value = -1;
if (high > low)
{
value = (generator.GetRandomUInt16() % (high - low + 1)) + low;
}
// cast value to correct type or generate a random value.
switch (tag.DataType)
{
case UnderlyingSystemDataType.Integer1: {
if (value == -1)
{
tag.Value = generator.GetRandomSByte();
}
else
{
tag.Value = (sbyte)value;
}
break;
}
case UnderlyingSystemDataType.Integer2: {
if (value == -1)
{
tag.Value = generator.GetRandomInt16();
}
else
{
tag.Value = (short)value;
}
break;
}
case UnderlyingSystemDataType.Integer4: {
if (value == -1)
{
tag.Value = generator.GetRandomInt32();
}
else
{
tag.Value = value;
}
break;
}
case UnderlyingSystemDataType.Real4: {
if (value == -1)
{
tag.Value = generator.GetRandomFloat();
}
else
{
tag.Value = (float)value;
}
break;
}
case UnderlyingSystemDataType.String: {
tag.Value = generator.GetRandomString();
break;
}
}
tag.Timestamp = DateTime.UtcNow;
return(true);
}