DataHub APIs for C++, Java, and .NET : Version 6.4
	Chapter 5. The DataHubPoint Class

Chapter 5. The `DataHubPoint` Class

Table of Contents

5.1. Overview
5.2. Categorized List of Methods

The DataHubPoint class represents a DataHub point object.

5.1. Overview

Syntax

For C++:

class CDataHubPoint

For Java:

public class DataHubPoint

For C#:

public class DataHubPoint

Remarks

DataHub point objects are the fundamental objects used to write, receive and manipulate data in the DataHub, via the DataHubConnector class. The DataHubPoint class provides a rich set of facilities to create, modify and inspect these objects.

DataHub points possess the following properties:

value: A value whose type is one of PT_TYPE_STRING, PT_TYPE_REAL (a double) or PT_TYPE_INT32 (an int). The value is stored in a corresponding format, and can be converted by the various utilities to access the value.
quality: Indicates whether the DataHub has been updated with actual data or if a point is uninitialized. This is typically either PT_QUALITY_GOOD or PT_QUALITY_BAD. Connection status can also affect the point quality.
confidence: A user defined value, typically in the range of 0-100%. This can be used to model 'aging' of a point, and support 'fuzzy math' algorithms.
timestamp: Tags the real-time origin of the point as it is distributed. Typically this is set by the software module originating the value of a point. It is modelled as seconds and nanoseconds, providing a resolution that is limited only by the OS.
userdata: Allows the user to associate with a specific point whatever object may be useful to the application. This is primarily used by the point cache cability provided by the DataHubConnector class (see initializePointCache).
locked: Controls access to the point.
security: Controls access to the point.
flags: For internal use.

Requirement Statements

For C++:

#include <CDataHubPoint.h>

For Java:

import cogent.DataHubPoint;

For C#:

using Cogent.DataHubAPI;


4.3. Making Callbacks		5.2. Categorized List of Methods

Chapter 5. The DataHubPoint Class

5.1. Overview

Syntax

For C++:

For Java:

For C#:

Remarks

Requirement Statements

For C++:

For Java:

For C#:

See also

Chapter 5. The `DataHubPoint` Class