| private ApplyRange ( object &value ) : Opc.Ua.StatusCode | ||
| value | object | |
| return | Opc.Ua.StatusCode | |
/// <summary>
/// Returns the value of the attribute for the specified child.
/// </summary>
/// <param name="context">The context to use when evaluating the operand.</param>
/// <param name="typeDefinitionId">The type of the instance.</param>
/// <param name="relativePath">The path from the instance to the node which defines the attribute.</param>
/// <param name="attributeId">The attribute to return.</param>
/// <param name="indexRange">The sub-set of an array value to return.</param>
/// <returns>
/// The attribute value. Returns null if the attribute does not exist.
/// </returns>
public object GetAttributeValue(
FilterContext context,
NodeId typeDefinitionId,
IList <QualifiedName> relativePath,
uint attributeId,
NumericRange indexRange)
{
if (!NodeId.IsNull(typeDefinitionId))
{
if (!context.TypeTree.IsTypeOf(m_typeDefinitionId, typeDefinitionId))
{
return(null);
}
}
object value = GetAttributeValue(
m_snapshot,
relativePath,
0,
attributeId);
if (indexRange != NumericRange.Empty)
{
StatusCode error = indexRange.ApplyRange(ref value);
if (StatusCode.IsBad(error))
{
value = null;
}
}
return(value);
}
/// <summary cref="IFilterTarget.GetAttributeValue" />
public virtual object GetAttributeValue(
FilterContext context,
NodeId typeDefinitionId,
IList <QualifiedName> relativePath,
uint attributeId,
NumericRange indexRange)
{
// check the type definition.
if (!NodeId.IsNull(typeDefinitionId) && typeDefinitionId != ObjectTypes.BaseEventType)
{
if (!context.TypeTree.IsTypeOf(TypeDefinitionId, typeDefinitionId))
{
return(null);
}
}
// read the child attribute.
DataValue dataValue = new DataValue();
ServiceResult result = ReadChildAttribute(
null,
relativePath,
0,
attributeId,
dataValue);
if (ServiceResult.IsBad(result))
{
return(null);
}
// apply any index range.
object value = dataValue.Value;
if (value != null)
{
result = indexRange.ApplyRange(ref value);
if (ServiceResult.IsBad(result))
{
return(null);
}
}
// return the result.
return(value);
}
/// <summary cref="IFilterTarget.GetAttributeValue" />
public virtual object GetAttributeValue(
FilterContext context,
NodeId typeDefinitionId,
IList<QualifiedName> relativePath,
uint attributeId,
NumericRange indexRange)
{
// check the type definition.
if (!NodeId.IsNull(typeDefinitionId) && typeDefinitionId != ObjectTypes.BaseEventType)
{
if (!context.TypeTree.IsTypeOf(TypeDefinitionId, typeDefinitionId))
{
return null;
}
}
// read the child attribute.
DataValue dataValue = new DataValue();
ServiceResult result = ReadChildAttribute(
null,
relativePath,
0,
attributeId,
dataValue);
if (ServiceResult.IsBad(result))
{
return null;
}
// apply any index range.
object value = dataValue.Value;
if (value != null)
{
result = indexRange.ApplyRange(ref value);
if (ServiceResult.IsBad(result))
{
return null;
}
}
// return the result.
return value;
}
/// <summary>
/// Adds a DataValue to a list of values to return.
/// </summary>
private void AddValue(
TimestampsToReturn timestampsToReturn,
NumericRange indexRange,
QualifiedName dataEncoding,
DataValueCollection values,
DataValue value)
{
// ignore invalid case.
if (value == null)
{
return;
}
// save the last timestamp returned.
m_lastTime = value.ServerTimestamp;
// check if the index range or data encoding can be applied.
if (StatusCode.IsGood(value.StatusCode))
{
object valueToReturn = value.Value;
// apply the index range.
if (indexRange != NumericRange.Empty)
{
StatusCode error = indexRange.ApplyRange(ref valueToReturn);
if (StatusCode.IsBad(error))
{
value.Value = null;
value.StatusCode = error;
}
else
{
value.Value = valueToReturn;
}
}
// apply the data encoding.
if (!QualifiedName.IsNull(dataEncoding))
{
value.Value = null;
value.StatusCode = StatusCodes.BadDataEncodingUnsupported;
}
}
// apply the timestamps filter.
if (timestampsToReturn == TimestampsToReturn.Neither || timestampsToReturn == TimestampsToReturn.Server)
{
value.SourceTimestamp = DateTime.MinValue;
}
if (timestampsToReturn == TimestampsToReturn.Neither || timestampsToReturn == TimestampsToReturn.Source)
{
value.ServerTimestamp = DateTime.MinValue;
}
// add result.
values.Add(value);
}
/// <summary>
/// Returns the value of the attribute for the specified child.
/// </summary>
/// <param name="context">The context to use when evaluating the operand.</param>
/// <param name="typeDefinitionId">The type of the instance.</param>
/// <param name="relativePath">The path from the instance to the node which defines the attribute.</param>
/// <param name="attributeId">The attribute to return.</param>
/// <param name="indexRange">The sub-set of an array value to return.</param>
/// <returns>
/// The attribute value. Returns null if the attribute does not exist.
/// </returns>
public object GetAttributeValue(
FilterContext context,
NodeId typeDefinitionId,
IList<QualifiedName> relativePath,
uint attributeId,
NumericRange indexRange)
{
if (!NodeId.IsNull(typeDefinitionId))
{
if (!context.TypeTree.IsTypeOf(m_typeDefinitionId, typeDefinitionId))
{
return null;
}
}
object value = GetAttributeValue(
m_snapshot,
relativePath,
0,
attributeId);
if (indexRange != NumericRange.Empty)
{
StatusCode error = indexRange.ApplyRange(ref value);
if (StatusCode.IsBad(error))
{
value = null;
}
}
return value;
}