HistoricalValue

All Superinterfaces:

java.lang.Comparable<HistoricalValue>

All Known Subinterfaces:

HistoricalValueGroup<V>, IdentifiedHistoricalValue<I>

All Known Implementing Classes:

BasicHistoricalValue, DatasourceQueryExecutor.PreprocessedHistoryGroup, RawTagValue
```
public interface HistoricalValue
extends java.lang.Comparable<HistoricalValue>
```
The basic value unit for the historical querying system. Implements comparable, which should sort values based on timestamp. Besides that, provides the date already converted to a long, and also provides the data type class of the value.

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`FLAG_DIRECT_AVG`	Note: this is a little unfortunate, how avg works.
`static int`	`FLAG_ENTRY`
`static int`	`FLAG_EXIT`
`static int`	`FLAG_FIRST_VAL`
`static int`	`FLAG_MAX`
`static int`	`FLAG_MIN`

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`DataTypeClass`	`getDataType()`
`int`	`getFlags()`	Flags are implementation dependent markers for the value.
`QualityCode`	`getQuality()`
`long`	`getTimestamp()`
`java.lang.Object`	`getValue()`

Methods inherited from interface java.lang.Comparable
compareTo

- Field Detail
  - FLAG_DIRECT_AVG
```
static final int FLAG_DIRECT_AVG
```
    Note: this is a little unfortunate, how avg works. By being originally defined as 0, that means that if we want to make sure it's the "average", we need to make sure the value is exactly 0. This means we can't allow average to be collapsed with entry/exit.
    This value type can also mean the only value in a window (the "direct" value).
    
    See Also:
    
    Constant Field Values
  - FLAG_MIN
```
static final int FLAG_MIN
```
    See Also:
    
    Constant Field Values
  - FLAG_MAX
```
static final int FLAG_MAX
```
    See Also:
    
    Constant Field Values
  - FLAG_EXIT
```
static final int FLAG_EXIT
```
    See Also:
    
    Constant Field Values
  - FLAG_FIRST_VAL
```
static final int FLAG_FIRST_VAL
```
    See Also:
    
    Constant Field Values
  - FLAG_ENTRY
```
static final int FLAG_ENTRY
```
    See Also:
    
    Constant Field Values
- Method Detail
  - getValue
```
java.lang.Object getValue()
```
  - getQuality
```
QualityCode getQuality()
```
  - getTimestamp
```
long getTimestamp()
```
  - getDataType
```
DataTypeClass getDataType()
```
  - getFlags
```
int getFlags()
```
    Flags are implementation dependent markers for the value.