IDifferenceViewer (epsilon 2.2.0-SNAPSHOT API)

All Known Implementing Classes:

EMFDifferenceViewer, FilesystemTreeDifferenceViewer, StringBasedDifferenceViewer
```
public interface IDifferenceViewer
```
Interface for showing the differences between the expected value and the actual value.

Author:

Antonio Garcia-Dominguez

Field Summary

Fields
Modifier and Type Field Description

static java.lang.String EXTENSION_POINT_ID

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`canCompare(java.lang.Object expected, java.lang.Object actual, java.lang.Object delta)`	Returns `true` if this viewer can show the differences between the expected and the actual results.
`void`	`compare(java.lang.Object expected, java.lang.Object actual, java.lang.Object delta)`	Shows the differences between the expected and actual values, which might have been precomputed or not.

- Field Detail
  - EXTENSION_POINT_ID
```
static final java.lang.String EXTENSION_POINT_ID
```
    See Also:
    
    Constant Field Values
- Method Detail
  - canCompare
```
boolean canCompare(java.lang.Object expected,
                   java.lang.Object actual,
                   java.lang.Object delta)
```
    Returns true if this viewer can show the differences between the expected and the actual results. This method will be called from the SWT thread.
    Parameters:
    
    expected - Expected value.
    
    actual - Actual value.
    
    delta - Precomputed differences, if available. Otherwise, null.
    
    Returns:
    
    true if this instance can either:
    
    compute and show the differences between expected and actual
    
    , or b) show the precomputed differences in delta.
    
    Otherwise, returns false.
  - compare
```
void compare(java.lang.Object expected,
             java.lang.Object actual,
             java.lang.Object delta)
```
    Shows the differences between the expected and actual values, which might have been precomputed or not. This method will be called from the SWT thread. This method should only be called if canCompare(java.lang.Object, java.lang.Object, java.lang.Object) returned true with the same parameters.
    
    Parameters:
    
    expected - Expected value.
    
    actual - Actual value.
    
    delta - Precomputed difference, if available. Otherwise, null.