ModifiedTrait (Smithy API 1.5.1)

java.lang.Object
- software.amazon.smithy.diff.evaluators.AbstractDiffEvaluator
- - software.amazon.smithy.diff.evaluators.ModifiedTrait

All Implemented Interfaces:

DiffEvaluator
```
public final class ModifiedTrait
extends AbstractDiffEvaluator
```
Finds breaking changes related to when a trait is added, removed, or updated.
This evaluator looks for trait definitions with specific tags. When traits that use these tags are added, removed, or updated, a validation event is emitted for the change. This evaluator honors the following tags:
- diff.error.add: It is an error to add a trait to an existing shape.
- diff.error.remove: It is an error to remove this trait from a shape.
- diff.error.update: It is an error to change the value of this shape.
- diff.error.const: It is an error to add, remove, or change a trait.

Field Summary

Fields
Modifier and Type	Field	Description
`static java.lang.String`	`DIFF_ERROR_ADD`	Tags that indicates a breaking change if a trait is added.
`static java.lang.String`	`DIFF_ERROR_CONST`	Tags that indicates a breaking change if a trait is added, removed, or changed.
`static java.lang.String`	`DIFF_ERROR_REMOVE`	Tags that indicates a breaking change if a trait is removed.
`static java.lang.String`	`DIFF_ERROR_UPDATE`	Tags that indicates a breaking change if a trait is updated.

Constructor Summary

Constructors
Constructor Description

ModifiedTrait()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.util.List<ValidationEvent>`	`evaluate(Differences differences)`	Returns validation events given two models and the detected differences between them.

Methods inherited from class software.amazon.smithy.diff.evaluators.AbstractDiffEvaluator
danger, danger, error, error, getEventId, note, note, warning, warning

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - DIFF_ERROR_ADD
```
public static final java.lang.String DIFF_ERROR_ADD
```
    Tags that indicates a breaking change if a trait is added.
    
    See Also:
    
    Constant Field Values
  - DIFF_ERROR_REMOVE
```
public static final java.lang.String DIFF_ERROR_REMOVE
```
    Tags that indicates a breaking change if a trait is removed.
    
    See Also:
    
    Constant Field Values
  - DIFF_ERROR_UPDATE
```
public static final java.lang.String DIFF_ERROR_UPDATE
```
    Tags that indicates a breaking change if a trait is updated.
    
    See Also:
    
    Constant Field Values
  - DIFF_ERROR_CONST
```
public static final java.lang.String DIFF_ERROR_CONST
```
    Tags that indicates a breaking change if a trait is added, removed, or changed.
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - ModifiedTrait
```
public ModifiedTrait()
```
- Method Detail
  - evaluate
```
public java.util.List<ValidationEvent> evaluate(Differences differences)
```
    Description copied from interface: DiffEvaluator
    
    Returns validation events given two models and the detected differences between them.
    
    Parameters:
    
    differences - Detected differences.
    
    Returns:
    
    Returns validation events that are relative to the new model.