Class UnknownKeyException

java.lang.Object

java.lang.Throwable

java.lang.Exception

com.oracle.truffle.api.interop.InteropException

com.oracle.truffle.api.interop.UnknownKeyException

All Implemented Interfaces:

Serializable

public final class UnknownKeyException
extends InteropException

An exception thrown if an object does not contain a hash entry with such a key. Interop exceptions are supposed to be caught and converted into a guest language error by the caller.

Since:

21.1.0

See Also:

• getUnknownKey()
• InteropLibrary
• Serialized Form

Method Summary

Modifier and Type	Method	Description
static UnknownKeyException	create(Object unknownKey)	Creates an UnknownKeyException to indicate that a key is missing in the hash object.
static UnknownKeyException	create(Object unknownKey, Throwable cause)	Creates an UnknownKeyException to indicate that a key is missing in the hash object.
String	getMessage()
Object	getUnknownKey()	Returns the hash key that could not be accessed.

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:

21.1.0

getUnknownKey

public Object getUnknownKey()

Returns the hash key that could not be accessed.

Since:

21.1.0

create

public static UnknownKeyException create(Object unknownKey)

Creates an UnknownKeyException to indicate that a key is missing in the hash object.

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

Parameters:

unknownKey - the key that could not be accessed

Since:

21.1.0

create

public static UnknownKeyException create(Object unknownKey,
 Throwable cause)

Creates an UnknownKeyException to indicate that a key is missing in the hash object.

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:

unknownKey - the key that could not be accessed

cause - the guest language exception that caused the error

Since:

21.1.0