Package org.camunda.bpm.engine.variable.impl.context

Class EmptyVariableContext

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 final EmptyVariableContext	INSTANCE

Method Summary

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 Details

INSTANCE

public static final EmptyVariableContext INSTANCE

Method Details

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.