Class StopIterationException

java.lang.Object

java.lang.Throwable

java.lang.Exception

com.oracle.truffle.api.interop.InteropException

com.oracle.truffle.api.interop.StopIterationException

All Implemented Interfaces:

Serializable

public final class StopIterationException
extends InteropException

An exception thrown if an iterator is finished.

This exception is thrown by the getIteratorNextElement when the iterator has no more elements to return.

Interop exceptions are supposed to be caught and converted into a guest language error by the caller.

Since:

21.1

See Also:

• InteropLibrary
• Serialized Form

Method Summary

Modifier and Type	Method	Description
static StopIterationException	create()	Creates an StopIterationException to indicate that iteration was stopped.
static StopIterationException	create(Throwable cause)	Creates an StopIterationException to indicate that iteration was stopped.
String	getMessage()

Methods inherited from class InteropException

fillInStackTrace, getCause, initCause

Methods inherited from class Throwable

addSuppressed, getLocalizedMessage, getStackTrace, getSuppressed, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class Object

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

Method Details

getMessage

public String getMessage()

Overrides:

getMessage in class Throwable

Since:

21.1

create

public static StopIterationException create()

Creates an StopIterationException to indicate that iteration was stopped.

This method is designed to be used in compiled code paths.

Since:

21.1

create

public static StopIterationException create(Throwable cause)

Creates an StopIterationException to indicate that iteration was stopped.

In addition a cause may be provided. The cause should only be set if the guest language code caused this problem. An example for this is a language specific proxy mechanism that invokes guest language code to describe an object. If the guest language code fails to execute and this interop exception is a valid interpretation of the error, then the error should be provided as cause. The cause can then be used by the source language as new exception cause if the InteropException is translated to a source language error. If the InteropException is discarded, then the cause will most likely get discarded by the source language as well. Note that the cause must be of type AbstractTruffleException otherwise an IllegalArgumentException is thrown.

This method is designed to be used in compiled code paths.

Parameters:

cause - the guest language exception that caused the error.

Since:

21.1