Package org.apache.nifi.attribute.expression.language

Class ParametersDisabledEvaluationContext

java.lang.Object

org.apache.nifi.attribute.expression.language.ParametersDisabledEvaluationContext

All Implemented Interfaces:

EvaluationContext

public class ParametersDisabledEvaluationContext
extends Object
implements EvaluationContext

Delegating implementation of Evaluation Context that blocks access to Parameter Values

Field Summary

Fields

Modifier and Type	Field	Description
private final EvaluationContext	evaluationContext

Constructor Summary

Constructors

Constructor	Description
ParametersDisabledEvaluationContext(EvaluationContext evaluationContext)

Method Summary

Modifier and Type	Method	Description
EvaluatorState	getEvaluatorState()
Set<String>	getExpressionKeys()	Returns the names of all attributes, variables, etc.
String	getExpressionValue(String name)	Returns the name of an attribute, variable, environment variable, or system variable that can be referenced in the Expression Language
Parameter	getParameter(String parameterName)	Get Parameter returns null in all cases to block access to Parameter Values
String	getState(String key)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

evaluationContext

private final EvaluationContext evaluationContext

Constructor Details

ParametersDisabledEvaluationContext

public ParametersDisabledEvaluationContext(EvaluationContext evaluationContext)

Method Details

getExpressionValue

public String getExpressionValue(String name)

Description copied from interface: EvaluationContext

Returns the name of an attribute, variable, environment variable, or system variable that can be referenced in the Expression Language

Specified by:

getExpressionValue in interface EvaluationContext

Parameters:

name - the name of the attribute, variable, etc.

Returns:

the value assigned to the attribute, variable, etc. or null if no such value exists

getExpressionKeys

public Set<String> getExpressionKeys()

Description copied from interface: EvaluationContext

Returns the names of all attributes, variables, etc. that can be used in Expression Language

Specified by:

getExpressionKeys in interface EvaluationContext

Returns:

the names of all keys that can be used in Expression Language

getState

public String getState(String key)

Specified by:

getState in interface EvaluationContext

getEvaluatorState

public EvaluatorState getEvaluatorState()

Specified by:

getEvaluatorState in interface EvaluationContext

getParameter

public Parameter getParameter(String parameterName)

Get Parameter returns null in all cases to block access to Parameter Values

Specified by:

getParameter in interface EvaluationContext

Parameters:

parameterName - Parameter Name

Returns:

Null Parameter