All Known Subinterfaces:

NESTSequentialWorkflowValidator, NESTWorkflowValidator

All Known Implementing Classes:

NESTGraphValidatorImpl, NESTSequentialWorkflowValidatorImpl, NESTWorkflowValidatorImpl
```
public interface NESTGraphValidator
```
To check if a NESTGraphObject is a valid graph, this class can be used. The validator provides methods, that verify that there are no redundancies in a generic nest graph.

Author:

Alexander Schultheis

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`String`	`getErrorMessage()`	This method outputs the collected error messages from previous methods as a String.
`NESTGraphObject`	`getGraph()`	This method returns the graph object for which the validator was created.
`boolean`	`hasFullyConnectedAndNoDuplicateEdges()`	This method checks that all edges have connections and that no edge is duplicated.
`boolean`	`hasUniqueEdgeIDs()`	This method checks if all edges in the graph have unique Ids.
`boolean`	`hasUniqueNodeIDs()`	This method checks if all nodes in the graph have unique Ids.
`boolean`	`hasValidSemanticDescriptors()`
`boolean`	`isValidGraph()`	This method checks whether the graph is a valid nest graph.
`void`	`reset()`	The method resets all values stored in the validator.

- Method Detail
  - reset
```
void reset()
```
    The method resets all values stored in the validator. This method is to be used when changes have been made to the graph object after validation by the validator.
  - isValidGraph
```
boolean isValidGraph()
```
    This method checks whether the graph is a valid nest graph. This is true if the graph has unique ids for nodes and edges and all edges are unique and connected. See methods hasUniqueEdgeIDs(), hasUniqueNodeIDs() and hasFullyConnectedAndNoDuplicateEdges().
    
    Returns:
    
    True, if graph is valid.
  - hasUniqueEdgeIDs
```
boolean hasUniqueEdgeIDs()
```
    This method checks if all edges in the graph have unique Ids.
    
    Returns:
    
    True, if all edge ids are unique.
  - hasUniqueNodeIDs
```
boolean hasUniqueNodeIDs()
```
    This method checks if all nodes in the graph have unique Ids.
    
    Returns:
    
    True, if all node ids are unique.
  - hasFullyConnectedAndNoDuplicateEdges
```
boolean hasFullyConnectedAndNoDuplicateEdges()
```
    This method checks that all edges have connections and that no edge is duplicated.
    
    Returns:
    
    True, if all edges are valid.
  - hasValidSemanticDescriptors
```
boolean hasValidSemanticDescriptors()
```
  - getErrorMessage
```
String getErrorMessage()
```
    This method outputs the collected error messages from previous methods as a String.
    
    Returns:
    
    A string containing all error messages. If the string is null, the graph was valid for all previous checks.
  - getGraph
```
NESTGraphObject getGraph()
```
    This method returns the graph object for which the validator was created.
    
    Returns:
    
    The graph object for which the validator was created.

Interface NESTGraphValidator

Method Summary

Method Detail

reset

isValidGraph

hasUniqueEdgeIDs

hasUniqueNodeIDs

hasFullyConnectedAndNoDuplicateEdges

hasValidSemanticDescriptors

getErrorMessage

getGraph