Package dev.cel.runtime

Class DefaultInterpreter

java.lang.Object

dev.cel.runtime.DefaultInterpreter

All Implemented Interfaces:

Interpreter

@ThreadSafe
@Internal
public final class DefaultInterpreter
extends java.lang.Object
implements Interpreter

Default implementation of the CEL interpreter.

Use as in:

   MessageFactory messageFactory = new LinkedMessageFactory();
   RuntimeTypeProvider typeProvider = new DescriptorMessageProvider(messageFactory);
   Dispatcher dispatcher = DefaultDispatcher.create();
   Interpreter interpreter = new DefaultInterpreter(typeProvider, dispatcher);
   Interpretable interpretable = interpreter.createInterpretable(checkedExpr);
   Object result = interpretable.eval(Activation.of("name", value));
 

Extensions functions can be added in addition to standard functions to the dispatcher as needed.

Note: {MessageFactory} instances may be combined using the MessageFactory.CombinedMessageFactory.

Note: On Android, the DescriptorMessageProvider is not supported as proto lite does not support descriptors. Instead, implement the MessageProvider interface directly.

CEL Library Internals. Do Not Use.

Constructor Summary

Constructors

Constructor	Description
DefaultInterpreter(RuntimeTypeProvider typeProvider, Dispatcher dispatcher)
DefaultInterpreter(RuntimeTypeProvider typeProvider, Dispatcher dispatcher, CelOptions celOptions)	Creates a new interpreter

Method Summary

Modifier and Type	Method	Description
Interpretable	createInterpretable(CelAbstractSyntaxTree ast)	Creates an interpretable for the given expression.
Interpretable	createInterpretable(CheckedExpr checkedExpr)	Deprecated.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultInterpreter

public DefaultInterpreter(RuntimeTypeProvider typeProvider,
                          Dispatcher dispatcher)

DefaultInterpreter

public DefaultInterpreter(RuntimeTypeProvider typeProvider,
                          Dispatcher dispatcher,
                          CelOptions celOptions)

Creates a new interpreter

Parameters:

typeProvider - object which allows to construct and inspect messages.

dispatcher - a method dispatcher.

celOptions - the configurable flags for adjusting evaluation behavior.

Method Detail

createInterpretable

@Deprecated
public Interpretable createInterpretable(CheckedExpr checkedExpr)

Deprecated.

Description copied from interface: Interpreter

Creates an interpretable for the given expression.

This method may run pre-processing and partial evaluation of the expression it gets passed.

Specified by:

createInterpretable in interface Interpreter

createInterpretable

public Interpretable createInterpretable(CelAbstractSyntaxTree ast)

Description copied from interface: Interpreter

Creates an interpretable for the given expression.

This method may run pre-processing and partial evaluation of the expression it gets passed.

Specified by:

createInterpretable in interface Interpreter