Package org.apache.nifi.expression

Enum Class ExpressionLanguageScope

java.lang.Object

java.lang.Enum<ExpressionLanguageScope>

org.apache.nifi.expression.ExpressionLanguageScope

All Implemented Interfaces:

Serializable, Comparable<ExpressionLanguageScope>, Constable

public enum ExpressionLanguageScope
extends Enum<ExpressionLanguageScope>

Indicates the scope of expression language on a property descriptor. Scope of the expression language is hierarchical. NONE -> ENVIRONMENT -> FLOWFILE_ATTRIBUTES When scope is set to FlowFiles attributes, variables are evaluated against attributes of each incoming flow file. If no matching attribute is found, env/syst properties will be checked. NONE - expression language is not supported ENVIRONMENT - Environment variables defined at JVM level and system properties. FLOWFILE_ATTRIBUTES - will check attributes of each individual flow file

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
ENVIRONMENT	Expression language is evaluated against variables in registry
FLOWFILE_ATTRIBUTES	Expression language is evaluated per flow file using attributes
NONE	Expression language is disabled

Field Summary

Fields

Modifier and Type	Field	Description
private String	description

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ExpressionLanguageScope(String description)

Method Summary

Modifier and Type	Method	Description
String	getDescription()
static ExpressionLanguageScope	valueOf(String name)	Returns the enum constant of this class with the specified name.
static ExpressionLanguageScope[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

NONE

public static final ExpressionLanguageScope NONE

Expression language is disabled

ENVIRONMENT

public static final ExpressionLanguageScope ENVIRONMENT

Expression language is evaluated against variables in registry

FLOWFILE_ATTRIBUTES

public static final ExpressionLanguageScope FLOWFILE_ATTRIBUTES

Expression language is evaluated per flow file using attributes

Field Details

description

private String description

Constructor Details

ExpressionLanguageScope

private ExpressionLanguageScope(String description)

Method Details

values

public static ExpressionLanguageScope[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static ExpressionLanguageScope valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

getDescription

public String getDescription()