Package dev.cel.runtime

Class CelAttribute

java.lang.Object

dev.cel.runtime.CelAttribute

@Immutable
public abstract class CelAttribute
extends java.lang.Object

CelAttribute represents the select path from the root (.) to a single leaf value that may be derived from the activation (e.g. .com.google.Attribute['index'])

This includes fully qualified identifiers and the selection path to a member field or element.

CelAttributes are represented as a list of qualifiers (select/index operations) from the root, e.g. identifier[2].field is represented as string:identifier, int:2, string:field.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	CelAttribute.Qualifier	Representation of a single select qualifier or index.

Field Summary

Fields

Modifier and Type	Field	Description
static CelAttribute	EMPTY	Empty attribute.

Constructor Summary

Constructors

Constructor	Description
CelAttribute()

Method Summary

Modifier and Type	Method	Description
static CelAttribute	create(com.google.common.collect.ImmutableList<CelAttribute.Qualifier> qualifiers)	Creates a CelAttribute.
static CelAttribute	create(java.lang.String rootIdentifier)	Creates a CelAttribute from a single root identifier.
static CelAttribute	fromQualifiedIdentifier(java.lang.String qualifiedIdentifier)	Attempts to parse a dot qualified identifier into a CEL attribute.
abstract com.google.common.collect.ImmutableList<CelAttribute.Qualifier>	qualifiers()	The list of qualifiers representing the select path for this attribute.
CelAttribute	qualify(CelAttribute.Qualifier qualifier)	Creates a new attribute that is more qualified (has an additional select or index operation) than the receiver.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY

public static final CelAttribute EMPTY

Empty attribute. Represents a value that doesn't have a corresponding attribute (e.g. the result of a function).

Constructor Detail

CelAttribute

public CelAttribute()

Method Detail

create

public static CelAttribute create(com.google.common.collect.ImmutableList<CelAttribute.Qualifier> qualifiers)

Creates a CelAttribute.

create

public static CelAttribute create(java.lang.String rootIdentifier)

Creates a CelAttribute from a single root identifier.

fromQualifiedIdentifier

public static CelAttribute fromQualifiedIdentifier(java.lang.String qualifiedIdentifier)

Attempts to parse a dot qualified identifier into a CEL attribute.

Throws:

java.lang.IllegalArgumentException - if qualifiedIdentifier isn't a legal qualified identifier. Note: this is intended for use with reference names in a checked CEL expression -- it does not check for some edge cases (e.g. reserved words).

qualifiers

public abstract com.google.common.collect.ImmutableList<CelAttribute.Qualifier> qualifiers()

The list of qualifiers representing the select path for this attribute.

qualify

public CelAttribute qualify(CelAttribute.Qualifier qualifier)

Creates a new attribute that is more qualified (has an additional select or index operation) than the receiver.

toString

public final java.lang.String toString()

Overrides:

toString in class java.lang.Object