InstanceHistories (AristaFlow Business Process Platform API)

```
public interface InstanceHistories
```
The InstanceHistories interface provides getters for various histories as XML document.

Author:

Kevin Goeser

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Document`	`getChangeHistoryXML()`	Returns the the change history as XML document (DOM object).
`Document`	`getDataHistoryXML(int dataElementID)`	Returns the history of the data element accesses and values as XML document.
`Document`	`getExecutionHistoryXML()`	Returns the execution history of the instance as XML document.
`UUID`	`getInstanceID()`	The ID of the instance, the histories belong to.

- Method Detail
  - getInstanceID
```
UUID getInstanceID()
```
    The ID of the instance, the histories belong to.
    
    Returns:
    
    The ID of the instance.
  - getChangeHistoryXML
```
Document getChangeHistoryXML()
```
    Returns the the change history as XML document (DOM object). This method returns null in case there is no history available.
    
    Returns:
    
    An XML representation of the change history.
  - getDataHistoryXML
```
Document getDataHistoryXML(int dataElementID)
```
    Returns the history of the data element accesses and values as XML document. This method returns null in case there is no history available.
    
    Parameters:
    
    dataElementID - The ID of the dataElement which history is requested.
    
    Returns:
    
    The data flow history of the data element.
  - getExecutionHistoryXML
```
Document getExecutionHistoryXML()
```
    Returns the execution history of the instance as XML document. This method returns null in case there is no history available.
    
    Returns:
    
    The execution history as XML document.