com.oracle.truffle.api.interop.StopIterationException Maven / Gradle / Ivy
Show all versions of truffle-api Show documentation
/*
* Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* The Universal Permissive License (UPL), Version 1.0
*
* Subject to the condition set forth below, permission is hereby granted to any
* person obtaining a copy of this software, associated documentation and/or
* data (collectively the "Software"), free of charge and under any and all
* copyright rights in the Software, and any and all patent rights owned or
* freely licensable by each licensor hereunder covering either (i) the
* unmodified Software as contributed to or provided by such licensor, or (ii)
* the Larger Works (as defined below), to deal in both
*
* (a) the Software, and
*
* (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
* one is included with the Software each a "Larger Work" to which the Software
* is contributed by such licensors),
*
* without restriction, including without limitation the rights to copy, create
* derivative works of, display, perform, and distribute the Software and make,
* use, sell, offer for sale, import, export, have made, and have sold the
* Software and the Larger Work(s), and to sublicense the foregoing rights on
* either these or other terms.
*
* This license is subject to the following condition:
*
* The above copyright notice and either this complete permission notice or at a
* minimum a reference to the UPL must be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.oracle.truffle.api.interop;
import com.oracle.truffle.api.CompilerDirectives;
/**
* An exception thrown if an iterator is finished.
*
* This exception is thrown by the {@link InteropLibrary#getIteratorNextElement
* 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.
*
* @see InteropLibrary
* @since 21.1
*/
public final class StopIterationException extends InteropException {
private static final long serialVersionUID = 1857745390734085182L;
private static final StopIterationException INSTANCE = new StopIterationException();
private StopIterationException() {
super(null);
}
private StopIterationException(Throwable cause) {
super(null, cause);
}
/**
* {@inheritDoc}
*
* @since 21.1
*/
@Override
public String getMessage() {
return "Iteration was stopped.";
}
/**
* Creates an {@link StopIterationException} to indicate that iteration was stopped.
*
* This method is designed to be used in {@link CompilerDirectives#inCompiledCode() compiled}
* code paths.
*
* @since 21.1
*/
public static StopIterationException create() {
return INSTANCE;
}
/**
* Creates an {@link 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 {@link InteropException} is translated to a source language error. If the
* {@link 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
* {@link com.oracle.truffle.api.exception.AbstractTruffleException} otherwise an
* {@link IllegalArgumentException} is thrown.
*
* This method is designed to be used in {@link CompilerDirectives#inCompiledCode() compiled}
* code paths.
*
* @param cause the guest language exception that caused the error.
* @since 21.1
*/
public static StopIterationException create(Throwable cause) {
return new StopIterationException(cause);
}
}