EmptyVariableContext (Camunda Platform Javadocs 7.20.0-SNAPSHOT)

java.lang.Object
- org.camunda.bpm.engine.variable.impl.context.EmptyVariableContext

All Implemented Interfaces:

VariableContext
```
public class EmptyVariableContext
extends Object
implements VariableContext
```
An empty variable context implementation which does not allow to resolve any variables.

Author:

Daniel Meyer

Field Summary

Fields
Modifier and Type Field Description

static EmptyVariableContext INSTANCE

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`containsVariable(String variableName)`	Checks whether a variable with the given name is resolve through this context.
`Set<String>`	`keySet()`
`TypedValue`	`resolve(String variableName)`	Resolve a value in this context.

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

- Field Detail
  - INSTANCE
```
public static final EmptyVariableContext INSTANCE
```
- Method Detail
  - resolve
```
public TypedValue resolve(String variableName)
```
    Description copied from interface: VariableContext
    
    Resolve a value in this context.
    
    Specified by:
    
    resolve in interface VariableContext
    
    Parameters:
    
    variableName - the name of the variable to resolve.
    
    Returns:
    
    the value of the variable or null in case the variable does not exist.
  - containsVariable
```
public boolean containsVariable(String variableName)
```
    Description copied from interface: VariableContext
    
    Checks whether a variable with the given name is resolve through this context.
    
    Specified by:
    
    containsVariable in interface VariableContext
    
    Parameters:
    
    variableName - the name of the variable to check
    
    Returns:
    
    true if the variable is resolve.
  - keySet
```
public Set<String> keySet()
```
    Specified by:
    
    keySet in interface VariableContext
    
    Returns:
    
    a set of all variable names resolvable through this Context.