Constraint (OptaPlanner Javadoc 8.22.1.Final API)

```
public interface Constraint
```
This represents a single constraint in the ConstraintStream API that impacts the Score. It is defined in ConstraintProvider.defineConstraints(ConstraintFactory) by calling ConstraintFactory.forEach(Class).

Method Summary

All Methods Instance Methods Abstract Methods Default Methods Deprecated Methods
Modifier and Type	Method	Description
`ConstraintFactory`	`getConstraintFactory()`	Deprecated, for removal: This API element is subject to removal in a future version. for removal as it is not necessary on the public API.
`default String`	`getConstraintId()`	The constraint id is `the constraint package` concatenated with "/" and `the constraint name`.
`String`	`getConstraintName()`	The constraint name.
`String`	`getConstraintPackage()`	The constraint package is the namespace of the constraint.

- Method Detail
  - getConstraintFactory
```
@Deprecated(forRemoval=true)
ConstraintFactory getConstraintFactory()
```
    Deprecated, for removal: This API element is subject to removal in a future version.
    for removal as it is not necessary on the public API.
    
    The ConstraintFactory that build this.
    
    Returns:
    
    never null
  - getConstraintPackage
```
String getConstraintPackage()
```
    The constraint package is the namespace of the constraint.
    When using a ConstraintConfiguration, it is equal to the ConstraintWeight.constraintPackage().
    
    Returns:
    
    never null
  - getConstraintName
```
String getConstraintName()
```
    The constraint name. It might not be unique, but getConstraintId() is unique.
    When using a ConstraintConfiguration, it is equal to the ConstraintWeight.value().
    
    Returns:
    
    never null
  - getConstraintId
```
default String getConstraintId()
```
    The constraint id is the constraint package concatenated with "/" and the constraint name. It is unique.
    
    Returns:
    
    never null