CostModel (Crawljax core 5.2.2 API)

Type Parameters:

D - type of node data on which the cost model is defined.

All Known Implementing Classes:

PerEditOperationStringNodeDataCostModel, StringUnitCostModel
```
public interface CostModel<D>
```
This interface specifies the methods to implement for a custom cost model. The methods represent the costs of edit operations (delete, insert, rename).
If the cost function is a metric, the tree edit distance is a metric too.
However, the cost function does not have to be a metric - the costs of deletion, insertion and rename can be arbitrary.
IMPORTANT: Mind the float type use for costs.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`float`	`del(AptedNode<D> n)`	Calculates the cost of deleting a node.
`float`	`ins(AptedNode<D> n)`	Calculates the cost of inserting a node.
`float`	`ren(AptedNode<D> n1, AptedNode<D> n2)`	Calculates the cost of renaming (mapping) two nodes.

- Method Detail
  - del
```
float del(AptedNode<D> n)
```
    Calculates the cost of deleting a node.
    
    Parameters:
    
    n - the node considered to be deleted.
    
    Returns:
    
    the cost of deleting node n.
  - ins
```
float ins(AptedNode<D> n)
```
    Calculates the cost of inserting a node.
    
    Parameters:
    
    n - the node considered to be inserted.
    
    Returns:
    
    the cost of inserting node n.
  - ren
```
float ren(AptedNode<D> n1,
          AptedNode<D> n2)
```
    Calculates the cost of renaming (mapping) two nodes.
    
    Parameters:
    
    n1 - the source node of rename.
    
    n2 - the destination node of rename.
    
    Returns:
    
    the cost of renaming (mapping) node n1 to n2.