HistoricalTagValue

All Superinterfaces:

HistoricalData, java.io.Serializable

All Known Implementing Classes:

BasicHistoricalTagValue, PackedHistoricalQualifiedValue, PackedHistoricalTagValue
```
public interface HistoricalTagValue
extends HistoricalData
```
This interface defines a piece of history coming from a tag, and is used by the history storage system. It is a QualifiedValue, and adds on some information about the source and settings.

NOTE: The tag history system does not expect multiple values for a given path for a given time. It relies on implementors of this interface to implement .equals() correctly in order to ensure this.

Field Summary

Fields
Modifier and Type Field Description

static java.lang.String TAG_DATA_SIGNITURE
All SQLTags history data shares the same signature.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`InterpolationMode`	`getInterpolationMode()`
`DataQuality`	`getQuality()`
`TagPath`	`getSource()`
`java.util.Date`	`getTimestamp()`
`TimestampSource`	`getTimestampSource()`
`DataTypeClass`	`getTypeClass()`
`java.lang.Object`	`getValue()`

Methods inherited from interface com.inductiveautomation.ignition.gateway.history.HistoricalData
getDataCount, getFlavor, getLoggerName, getSignature

Field Detail
- TAG_DATA_SIGNITURE
```
static final java.lang.String TAG_DATA_SIGNITURE
```
  All SQLTags history data shares the same signature.
  
  See Also:
  
  Constant Field Values

Method Detail

getSource
```
TagPath getSource()
```

getTypeClass
```
DataTypeClass getTypeClass()
```

getInterpolationMode

InterpolationMode getInterpolationMode()

getTimestampSource
```
TimestampSource getTimestampSource()
```

getValue
```
java.lang.Object getValue()
```

getQuality
```
DataQuality getQuality()
```

getTimestamp
```
java.util.Date getTimestamp()
```