NotNullConstraint (Nuxeo 2021.53.3 API Documentation)

java.lang.Object
- org.nuxeo.ecm.core.schema.types.constraints.AbstractConstraint
- - org.nuxeo.ecm.core.schema.types.constraints.NotNullConstraint

All Implemented Interfaces:

Serializable, Constraint
```
public class NotNullConstraint
extends AbstractConstraint
```
This constraint ensure some object is not null.
This class is a singleton. Use get() to get the singleton.

Since:

7.1

Author:

Nicolas Chapurlat

See Also:

Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from interface org.nuxeo.ecm.core.schema.types.constraints.Constraint
  Constraint.Description

Field Summary
- Fields inherited from interface org.nuxeo.ecm.core.schema.types.constraints.Constraint
  MESSAGES_BUNDLE, MESSAGES_DEFAULT_LANG, MESSAGES_KEY

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(Object obj)`
`static NotNullConstraint`	`get()`
`Constraint.Description`	`getDescription()`	Here, value is : name = "NotNullConstraint".
`int`	`hashCode()`
`boolean`	`validate(Object object)`	Validates the given object against this constraint.

Methods inherited from class org.nuxeo.ecm.core.schema.types.constraints.AbstractConstraint
getErrorMessage, getMessageKey, getMessageString, toString

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

- Method Detail
  - get
```
public static NotNullConstraint get()
```
  - validate
```
public boolean validate(Object object)
```
    Description copied from interface: Constraint
    
    Validates the given object against this constraint.
    If some object is null. Constraint should return true while validating unless the constraint deals with nullable state.
    
    Parameters:
    
    object - the object to validate
    
    Returns:
    
    true if the object was successfully validated, false otherwise
  - getDescription
```
public Constraint.Description getDescription()
```
    Here, value is :
    name = "NotNullConstraint".
    parameters is empty
    
    Returns:
    
    The constraint description.
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - equals
```
public boolean equals(Object obj)
```
    Overrides:
    
    equals in class Object