IsPropertyNullCondition (Logback-Parent 1.5.34 API)

java.lang.Object
- ch.qos.logback.core.spi.ContextAwareBase
- - ch.qos.logback.core.boolex.PropertyConditionBase
  - - ch.qos.logback.core.boolex.IsPropertyNullCondition

All Implemented Interfaces:

PropertyCondition, Condition, ContextAware, LifeCycle
```
public class IsPropertyNullCondition
extends PropertyConditionBase
```

Field Summary
- Fields inherited from class ch.qos.logback.core.spi.ContextAwareBase
  context

Constructor Summary

Constructors
Constructor Description

IsPropertyNullCondition()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`evaluate()`	Evaluate the condition.
`String`	`getKey()`
`void`	`setKey(String key)`
`void`	`start()`	Starts this evaluator.

Methods inherited from class ch.qos.logback.core.boolex.PropertyConditionBase
getLocalPropertyContainer, isDefined, isNull, isStarted, p, property, propertyContains, propertyEquals, setLocalPropertyContainer, stop

Methods inherited from class ch.qos.logback.core.spi.ContextAwareBase
addError, addError, addInfo, addInfo, addStatus, addWarn, addWarn, getContext, getDeclaredOrigin, getStatusManager, setContext

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

Methods inherited from interface ch.qos.logback.core.spi.ContextAware
addError, addError, addInfo, addInfo, addStatus, addWarn, addWarn, getContext, setContext

- Constructor Detail
  - IsPropertyNullCondition
```
public IsPropertyNullCondition()
```
- Method Detail
  - start
```
public void start()
```
    Description copied from class: PropertyConditionBase
    
    Starts this evaluator.
    
    Specified by:
    
    start in interface LifeCycle
    
    Overrides:
    
    start in class PropertyConditionBase
  - getKey
```
public String getKey()
```
  - setKey
```
public void setKey(String key)
```
  - evaluate
```
public boolean evaluate()
```
    Description copied from interface: Condition
    
    Evaluate the condition.
    
    Returns:
    
    true if the condition is satisfied and the associated conditional block should be activated; false otherwise